Browsing by Author "Raghvendra Singh"

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A new species of Parapyricularia from India and a key to all species
(2013) Raghvendra Singh; Shambhu Kumar; Archana Singh; Kalawati Shukla
Parapyricularia indica, sp. nov., on living leaves of Gongronema hemsleyanum (Asclepiadaceae) in subtropical forests of Uttar Pradesh, India, is described, illustrated and compared with other species of Parapyricularia. A key to species of Parapyricularia is provided. Description and nomenclatural details were deposited in MvcoBank.
A new species of Podosphaera sect. Sphaerotheca subsect. Magnicellulatae from India and a key to all species reported on Fabaceae
(Magnolia Press, 2020) Sanjay Yadav; Sanjeet Kumar Verma; Raghvendra Singh; Vinay Kumar Singh; Prakash Kushwaha
Podosphaera thermopsidicola, a new sexual morph form of powdery mildew was discovered on living leaves of Thermopsis barbata Benth. (Fabaceae). It is described, illustrated and compared with other Podosphaera species reported on Fabaceae. The phylogeny of this species has been inferred from partial nuclear ribosomal 28S large subunit (LSU) and internal transcribed spacer (ITS) rDNA sequence data. On the basis of LSU, P. thermopsidicola represents characteristic feature of Podosphaera s. str. Phylogenetically, P. thermopsidicola is closer to P. erigerontis-canadensis but differs in having larger chasmothecia, longer appendages, thick-walled asci, smaller oculi and smaller ascospores. © 2020 Magnolia Press
A new species of Podosphaera sect. Sphaerotheca subsect. Sphaerotheca from India—first report of powdery mildew causing wilting and ultimately death of leaves of Filipendula vestita
(Magnolia Press, 2021) Sanjay Yadav; Sanjeet Kumar Verma; Raghvendra Singh
Podosphaera filipendulensis, a new teleomorph of powdery mildew was discovered on living leaves of Filipendula vestita (Rosaceae). It is the first species of powdery mildew that causes wilting and ultimately death of apical infected leaves of F. vestita. It is described, illustrated and compared with other Podosphaera species reported on Rosaceae and a key to all species reported on Rosaceae is provided. The phylogeny of this species has been inferred from internal transcribed spacer (ITS) rDNA sequence data. Phylogenetically, P. filipendulensis is close to P. ferruginea var. ferruginea and P. macularis but differs in having larger chasmothecia, smaller peridium cells, shorter, narrower and aseptate appendages, 8-spored asci and smaller ascospores. Copyright © 2021 Magnolia Press
A new species of Pseudocercosporella on Andrographis paniculata from Central India
(Verlag Ferdinand Berger und Sohne GmbH, 2016) Neha Awasthi; Raghvendra Singh; Shambhu Kumar
Pseudocercosporella andrographidis, a new foliicolous mucedinaceous hyphomycetous fungus (Mycosphaerellaceae) discovered on living leaves of Andrographis paniculata (Acanthaceae), is described and illustrated. The new species, which is the first Pseudocercosporella species on a host of the Acanthaceae, is compared with other species of the Mycosphaerellaceae described on Andrographis spp.
A new species of Zasmidium (Mycosphaerellaceae) from India
(Verlag Ferdinand Berger und Sohne GmbH, 2014) Archana Singh; Ravindra N. Kharwar; Raghvendra Singh; Shambhu Kumar
A new species ot Zasmidium smilacis-proliferae on living leaves ot Smilax prolifera (Smilacaceae), from the Chawk forest in the Tarai Region of Uttar Pradesh, India is described, illustrated and compared with other Zasmidium species on Smilax.
Addition of three new lineages in Mycosphaerellaceae: Neoacervuloseptoria gen. nov., Neocercosporella gen. nov. and Neoramulariopsis gen. nov.
(Springer Science and Business Media Deutschland GmbH, 2023) Sanjay Yadav; Raghvendra Singh; Sanjeet Kumar Verma; Gargee Singh; Prakash Kushwaha
A colourless hyphomycetous fungus was found on living leaves of Peristrophe bicalyculata in India. Molecular phylogenetic analyses of several loci (LSU-RPB2-ITS) indicated a relationship with cercosporoid fungi (Mycosphaerellaceae). Since there is no other known lineage with similar morphology or DNA sequences, the new genus Neocercosporella is proposed with N. peristrophes comb. nov., based on Cercosporella peristrophes as type species. Pseudocercosporella andrographidis is recognized as new synonym. Similar ultrastructure of conidiogenous loci and hila confirm that N. peristrophes and P. andrographidis are conspecific. The conidiogenous loci are conical and have a small rim-like depression on the top encircling a small flat protuberant structure, which differs from other closely related members of the ramularioid complex. Neocercosporella and Cercosporella s. str. are paraphyletic as are several other genera in the Mycosphaerellaceae. Accordingly, we propose three new genera and four new combinations. The new genera are Neoacervuloseptoria gen. nov., Neocercosporella gen. nov. and Neoramulariopsis gen. nov. The new combinations are Neoacervuloseptoria fraxini comb. nov., Neocercosporella peristrophes comb. nov., Neoramulariopsis catenulata comb. nov. and Neoramulariopsis unguis-cati comb. nov. © 2023, German Mycological Society and Springer-Verlag GmbH Germany, part of Springer Nature.
Addition of two new genera—Marcstadlera gen. nov. and Neoclypeosphaerella gen. nov. (Mycosphaerellaceae)—based on polyphasic evidence
(Frontiers Media SA, 2025) Gargee Singh; Soumyadeep Rajwar; Sahana Khatoon; S. Yadav; Pooja Kumari; Raghvendra Singh; Kamalesh Kumar; Smriti Mall; Paras Nath Singh; S. Saran Kumar; Uwe Braun
During a survey of foliicolous fungi in India, two interesting anamorphic hyphomycetous fungal specimens were collected from infected leaves of Calotropis spp. and Mallotus philippensis. Calotropis spp. produce fascicles of conidiophores from stromata, accompanied by secondary superficial hyphae bearing solitary conidiophores. The specimen on Mallotus philippensis resembled Mycovellosiella, characterized by secondary superficial hyphae bearing micronematous to semi-macronematous, mononematous, unbranched, and aseptate conidiophores. A polyphasic approach—including morphological, cultural, and multilocus phylogenetic analyses (LSU-Rpb2-ITS), coupled with genealogical concordance phylogenetic species recognition—identified its relationship with cercosporoid fungi within the family Mycosphaerellaceae. The analysis confirmed that these fungal specimens represent distinct lineages without known morphological or DNA sequence counterparts. Consequently, two new genera are proposed: Marcstadlera and Neoclypeosphaerella, with M. malloti comb. nov. and N. calotropidis comb. nov. as their respective type species. Additionally, Clypeosphaerella calotropidis, Clypeosphaerella quasiparkii, and Pseudocercospora malloti are recognized as new synonyms. Several genera in the Mycosphaerellaceae, including Marcstadlera and Neoclypeosphaerella, are monophyletic. The ultrastructure of the conidiogenous loci and hila differs between these two genera. In Marcstadlera, the loci are cylindrical or peg-like, truncate at the apex, while the conidial base is narrowly obconically truncate. In Neoclypeosphaerella, the loci are slightly protuberant and surrounded by a circular rim-like structure, forming a truncated apex with a centrally positioned small apical depression. The conidial base is obconically truncated and also surrounded by a circular rim-like structure. © © 2025 Singh, Rajwar, Khatoon, Yadav, Kumari, Singh, Kumar, Mall, Singh, Kumar and Braun.
Additions to Ochroconis from India
(Magnolia Press, 2019) Archana Singh; Nikhil Kumar Singh; Paras Nath Singh; Raghvendra Singh; Nawal Kishore Dubey
Ochroconis helicteris, a novel species of the oligotrophic genus Ochroconis (Sympoventuriaceae, Venturiales), has been described and illustrated. Morphologically, this species has characters similar to allied species in the genus Ochroconis, but differs in conidial dimensions and shape. Phylogenetic analyses using nuclear ribosomal DNA gene ITS and protein coding gene BT2 revealed it clustering as monophyletic clade which was separated from known Ochroconis species. New species was isolated from leaf surface of medicinal plant Helicteris isora L. Copyright © 2019 Magnolia Press
Cercosporella bundelkhandae comb. nov. From India
(Mycotaxon Ltd, 2020) Raghvendra Singh; Sanjeet Kumar Verma; Sanjay Yadav; Shambhu Kumar
The new combination Cercosporella bundelkhandae ( Pseudocercosporella bundelkhandae) is proposed, based on critical morphological re-examination of the holotype specimen and fresh topotypic material and comparison with closely related species of cercosporoid hyphomycetes. The species was originally collected on living leaves of Tinospora sinensis from Jhansi, Utttar Pradesh, India. © 2020 Mycotaxon Ltd. All rights reserved.
Corynespora titarpaniensis sp. nov., on Lepidagathis from Central India
(Mycotaxon Ltd, 2017) Prakash Kushwaha; Raghvendra Singh; Shambhu Kumar
A new asexual fungus Corynespora titarpaniensis, discovered on Lepidagathis sp. (Acanthaceae) from Madhya Pradesh, India, is described, illustrated, and compared with closely similar species.
Distocercospora curvulata sp. nov. from northern India
(Mycotaxon Ltd, 2022) Sanjeet Kumar Verma; Sanjay Yadav; Raghvendra Singh
A new species of asexual foliicolous fungus, Distocercospora curvulata, discovered on living leaves of Causonis trifolia from Uttarakhand, India, is described and illustrated. © 2022 Mycotaxon Ltd. All rights reserved.
Fungal diversity notes 1818–1918: taxonomic and phylogenetic contributions on genera and species of fungi
(Springer Nature, 2024) Ishara S. Manawasinghe; Kevin D. Hyde; Dhanushka N. Wanasinghe; Samantha C. Karunarathna; Sajeewa S. N. Maharachchikumbura; Milan C. Samarakoon; Hermann Voglmayr; Ka-Lai Pang; Michael Wai-Lun Chiang; E. B. Gareth Jones; Ramesh K. Saxena; Arun Kumar; Kunhiraman C. Rajeshkumar; Laura Selbmann; Claudia Coleine; Yuwei Hu; A. Martyn Ainsworth; Kare Liimatainen; Tuula Niskanen; Anna Ralaiveloarisoa; Elangovan Arumugam; Kezhocuyi Kezo; Malarvizhi Kaliyaperumal; Sugantha Gunaseelan; Asha J. Dissanayake; Abdul Nasir Khalid; Achala Jeevani Gajanayake; Adam Flakus; Alireza Armand; André Aptroot; Andre Rodrigues; Andrei Tsurykau; Ángela López-Villalba; Antonio Roberto Gomes de Farias; Antonio Sánchez; Aristóteles Góes-Neto; Bruno T. Goto; Carlos A. F. de Souza; Charuwan Chuaseeharonnachai; Chuan-Gen Lin; Cuijinyi Li; Cvetomir M. Denchev; Daniel Guerra-Mateo; Danushka S. Tennakoon; De-Ping Wei; Dominik Begerow; Eduardo Alves; Elisandro Ricardo Drechsler-Santos; Enayra Silva Sousa; Erika Valente de Medeiros; Ewald Langer; Fa Zhang; Francisco A. de Souza; Franco Magurno; Gabriel G. Barreto; Gabriel Moreno; Gajanan Mane; Genivaldo Alves-Silva; Gladstone Alves da Silva; Guiyang Xia; Hong-Wei Shen; Heng Gui; Indunil C. Senanayake; Janet Jennifer Luangsa-ard; Jia-Wei Liu; Jian-Kui Liu; Jian Ma; Jie-Ying Lin; José Evando Aguiar Beserra Jr; Jose F. Cano-Lira; Josepa Gené; Kuniyil Harikrishnan; Li Lu; Lidiane A. dos Santos; Lijian Xu; Lorena T. Lacerda; Luís F. P. Gusmão; Marcela E. S. Cáceres; Marcos Paz Saraiva Câmara; Maria B. B. de Barros-Barreto; Mark S. Calabon; Martin Kukwa; Martin Kemler; Maruzanete Pereira de Melo; Masoomeh Ghobad-Nejhad; Mei Luo; Mengmeng Ding; Mingkwan Doilom; Monthien Phonemany; Muhammad Usman; Naritsada Thongklang; Nattawut Boonyuen; Nikhil Ashtekar; Nuwan D. Kularathnage; Onden P. Sruthi; Papichaya Kwantong; Parayelil A. Ansil; Pepijn W. Kooij; Qi Zhao; Rafael Ferreira Alfenas; Rafael J. V. de Oliveira; Raghvendra Singh; Rejane Maria Ferreira da Silva; Rameshwar Avchar; Rashmi Morey; Rohit Sharma; Rong-Ju Xu; Rosa Mara B. da Silveira; Rui-Fang Xu; Ruvishika S. Jayawardena; Salna Nanu; Salilaporn Nuankaew; Saowaluck Tibpromma; Saranyapath Boonmie; Sayanh Somrithipol; Sherin Varghese; Silvino Intra Moreira; Soumyadeep Rajwar; Shu-Cheng He; T. K. Arun Kumar; Teodor T. Denchev; Thatsanee Luangharn; Thays Gabrielle Lins de Oliveira; Tian-Ye Du; Ting-Chi Wen; Tingting Du; Tong Wu; Veera Sri-Indrasutdhi; Vinson P. Doyle; Vladimir Baulin; Wei Dong; Wen-Li Li; Wen-Hua Lu; Wenhui Tian; Willie Anderson dos Vieira; Wolfgang von Brackel; Xian-Dong Yu; Xian Zhang; Xiang-Fu Liu; Xing-Can Peng; Yanpeng Chen; Yanyan Yang; Ying Gao; YinRu Xiong; Yongxin Shu; Yong-Zhong Lu; Yuan-Min Shen; Yueyan Zhou; Yun Xia Zhang; Wei Zhang; Zong-Long Luo; Manawaduge Ayesha Madushani; Ratchadawan Cheewangkoon; Jia Ge Song; Biao Xu
This article is the 17th in the Fungal Diversity Notes series which allows the researchers to publish fungal collections with updated reports of fungus-host and fungus-geography. Herein we report 97 taxa with four new genera distributed in three phyla (Ascomycota, Glomeromycota and Mucoromycota), 11 classes, 38 orders and 62 families collected from various regions worldwide. This collection is further classified into taxa from 69 genera with four novel genera namely Jinshana, Lithophyllospora, Parapolyplosphaeria and Stegonsporiicola. Furthermore, 71 new species, 21 new records, one new combination and four novel phylogenetic placements are provided. The new species comprise Acrocalymma estuarinum, Aggregatorygma isidiatum, Alleppeysporonites elsikii, Amphibambusa aquatica, Apiospora hongheensis, Arthrobotrys tachengensis, Calonectria potisiana, Collariella hongheensis, Colletotrichum squamosae, Corynespora chengduensis, Diaporthe beijingensis, Dicellaesporites plicatus, Dicellaesporites verrucatus, Dictyoarthrinium endophyticum, Distoseptispora chiangraiensis, Dothiora eucalypti, Epicoccum indicum, Exesisporites chandrae, Fitzroyomyces pseudopandanicola, Fomitiporia exigua, Fomitiporia rondonii, Fulvifomes subthailandicus, Gigaspora siqueirae, Gymnopus ailaoensis, Hyalorbilia yunnanensis, Hygrocybe minimiholatra, H. mitsinjoensis, H. parviholatra, H. solis, H. vintsy, Helicogermslita kunmingensis, Jinshana tangtangiae, Kirschsteiniothelia dujuanhuensis, Lamproderma subcristatum, Leucoagaricus madagascarensis, Leucocoprinus mantadiaensis, Lithophyllospora australis, Marasmius qujingensis, Melomastia aquilariae, Monoporisporites jansoniusii, M. pattersonii, Monoporisporites valdiyae, Mucispora maesotensis, Mucor soli, Muyocopron yunnanensis, Nigrospora tomentosae, Ocellularia psorirregularis, Ophiocordyceps duyunensis, Oxneriaria nigrodisca, Oxydothis aquatica, O. filiforme, Phacidiella xishuangbannaensis, Phlebiopsis subgriseofuscescens, Pleurothecium takense, Pleurotus tuber-regium, Pseudochaetosphaeronema puerensis, Pseudodactylaria guttulate, Racheliella chinensis, Rhexoacrodictys fangensis, Roussoella neoaquatica, Rubroboletus pruinosus, Sanghuangporus subzonatus, Scytalidium assmuthi, Shrungabeeja kudremukhensis, Spirographa skorinae, Stanjehughesia bambusicola, Stegonsporiicola aurantiaca, Umbelopsis hingganensis, Vararia tenuata, Verruconis pakchongensis, Wongia bandungensis, and Zygosporium cymodoceae. The new combination is Parapolyplosphaeria thailandica (≡ Polyplosphaeria thailandica). The 21 new hosts, geographical and habitat records comprise Acrocalymma fici, Apiculospora spartii, Aspergillus subramanianii, Camposporium ramosum, Clonostachys rogersoniana, Colletotrichum brevisporum, C. plurivorum, Collybiopsis gibbosa, Dictyosporium tratense, Distoseptispora adscendens, Exosporium livistonae, Ganoderma gibbosum, Graphis mikuraensis, Gymnosporangium paraphysatum, Lasiodiplodia thailandica, Moesziomyces bullatus, Penicillium cremeogriseum, P. echinulonalgiovense, P. javanicum, P. lanosocoeruleum, P. polonicum, and Pleurotus tuber-regium. Graphis chlorotica, G. panhalensis and G. parilis are given as novel phylogenetic placements. In addition, we provide the morphology of Tarzetta tibetensis which was missing in the previous Fungal Diversity Notes 1611–1716. Identification of characterization of all these taxa are supported by morphological and multigene phylogenetic analyses. © The Author(s) under exclusive licence to Mushroom Research Foundation 2024.
Fungal diversity notes 2017–2122: taxonomic and phylogenetic contributions to freshwater fungi and other fungal taxa
(Springer Nature, 2025) Wei Dong; Kevin D. Hyde; Rajesh Jeewon; Samantha Chandranath Karunarathna; Huang Zhang; Walter Rossi; M. Leonardi; V. Kezo; Malarvizhi Kaliyaperumal; Yongxin Shu; Chunlin Yang; Feihu Wang; Feng Liu; Jian Ma; Jingyi Zhang; Yongzhong Lu; Mohamed Ahmed Abdel-Wahab; Ana Flávia Leão; Fábio Alex Custódio; Thiago Oliveira Condé; Olinto Liparini Pereira; Chunfang Liao; Haijun Zhao; Rongju Xu; Qi Zhao; Tianye Du; Saowaluck Tibpromma; Jutamart Monkai; Saisamorn Lumyong; Shucheng He; Digvijayini Bundhun; Yu Yang; Yuanpin Xiao; Danushka Sandaruwan Tennakoon; Lisu Han; Dongqin Dai; Hua Li; Yunhui Yang; Ishara S. Manawasinghe; Nimali Indeewari de Silva; Mark Seasat Calabon; Guangcong Ren; Deping Wei; Tingchi Wen; Xia Tang; Alireza Armand; Ruvishika Shehali Jayawardena; Raghvendra Singh; Soumyadeep Rajwar; S. Saran Kumar; Yanyan Yang; Entaj Tarafder; Krishnendu Acharya; Hongwei Shen; Zonglong Luo; Jianwei Liu; Fuqiang Yu; Yanxia Li; Yanpeng Chen; Sajeewa S.N. S N Maharachchikumbura; Shivannegowda Mahadevakumar; Pullabhotla Venkata Subba Rama Narshima Sarma; Chalasani Danteswari; Appa Rao Podile; Siddaiah Chandranayaka; Jafar Abdollahzadeh; Pezhman Amirashayeri; Sodabeh Piri Kakihai; Samaneh Bashiri; Filip Karpowicz; Stanislav Glejdura; Vladimír Kunca; Anna Ronikier; Michał Ronikier; Ryszard Rutkowski; Piotr Mleczko; Nakarin Suwannarach; Jaturong Kumla; Chanokned Senwanna; YUSUFJON Sh GAFFOROV; Massimo Sanna; Alberto Mua; Giuseppe Porcu; Marco Casula; Andrea C. Rinaldi; Leila Mohammadi Hamidi; A. Ahmadpour; Youbert Ghosta; Magdalena Oset; Martin Kukwa; Beata Guzow-Krzemińska; Muhammad Usman; Abdul Nasir Khalid; Emilia Anna Ossowska; Magdalena Kosecka; Steven L. Miller; Terry W. Henkel; Mary Catherine Aime; Oǧuzhan Kaygusuz; Ditte Bandini
This article is the 19th contribution to the fungal diversity notes series, in which 106 taxa distributed in 3 phyla, 11 classes, 35 orders, and 64 families are treated. Taxa described in the present study include a new family, 5 new genera, 69 new species, 3 new combinations, 25 new host, habitat, and geographical records, a new name, a new collection, as well as reinstating a previously suppressed genus. The newly established family is Parasporidesmiaceae and the five new genera described herein are Dematiodidymosporum, Neoacrogenospora, Parasporidesmium, Speluncomyces, and Uniomyces. The 69 new species are Acrocalymma triseptatum, Agaricus darjeelingensis, Annellophorella aquatica, Anteaglonium menghaiense, Balsamia microspora, Bambusicola dehongensis, Barriopsis menglaense, Benjaminiomyces bergonzoi, Camporesiomyces aquaticus, Camporesiomyces wurfbainiae, Cercospora palmata, Chrysomphalina cantharella, Colletotrichum heteropanacicola, Conioscypha guizhouensis, Conioscypha yadongensis, Cora dalfornoae, Cylindromonium brasiliense, Dematiodidymosporum aquaticum, Distoseptispora dinghuensis, Distoseptispora zunyiensis, Ebollia neocarnea, Eudimeromyces aequatorialis, Eudimeromyces euconni, Funalia indica, Fuscosporella ovalis, Fuscosporella yunnanensis, Halobasidium csapodyae, Halokirschsteiniothelia hunanensis, Hongkongmyces xishuangbannaensis, Inocybe ispartaensis, Laboulbenia neofrancoisiana, Lachnella kunmingensis, Lasmenia thailandica, Leptospora cannabini, Lycoperdon sridharii, Myxospora neomasonii, Natipusilla aquatica, Neoacrogenospora aquatica, Neomassaria sinensis, Neovaginatispora juglandis, Niesslia yunnanensis, Ophiocordyceps aseptatospora, Oxneriaria sheosarensis, Paramicrosphaeropsis vitis, Paramyrothecium strychni, Parapaucispora aquatica, Parasporidesmium aquaticum, Parmelia neosaxatilis, Periconia bambusicola, Periconia neohongheensis, Peroneutypa thailandica, Polyozellus albus, Porina magnoliae, Porostereum subspadiceum, Pseudosperma subvolvatum, Pseudothyridariella caseariae, Rhexocercosporidium ferulae, Russula rubroglutinata, Septoriella iranica, Seriascoma asexuale, Sesquicillium flavum, Sirastachys zhongkaiensis, Speluncomyces lunatus, Sporidesmiella yunnanensis, Striaticonidium xishuangbannaensis, Trametopsis indica, Tulostoma hyderabadensis, Uniomyces hakkeijimanus, and Virgaria guizhouensis. The three new combinations are Lycoperdon alpinum, Lycoperdon lloydii, and Lycoperdon macrogemmae. The 25 new records comprise Acremonium sclerotigenum, Agroathelia rolfsii, Alfaria terrestris, Aspergillus cejpii, Colletotrichum brevisporum, Coriolopsis brunneoleuca, Coriolopsis hainanensis, Cytospora tamaricicola, Fomitopsis malicola, Fulvifomes fastuosus, Fulvifomes thailandicus, Funalia cystidiata, Funalia subgallica, Longididymella vitalbae, Lopharia mirabilis, Metarhizium viridulum, Neopestalotiopsis haikouensis, Occultibambusa aquatica, Phaeoacremonium scolyti, Phaeocytostroma virdimurae, Puccinia mysuruensis, Rhizopus stolonifer, Serpula similis, Trametes ellipsospora, and Vamsapriya shiwandashanensis. In addition, the new name is Irpiciporus pseudoxuchilensis, and the new collection is Aspergillus sydowii. The previously suppressed genus Eudimeromyces has been taxonomically reinstated. © The Author(s) under exclusive licence to Mushroom Research Foundation 2025.
Heterosis and inbreeding depression for fruit characters in cucumber
(Indian Academy of Horticultural Sciences, 2012) Raghvendra Singh; Anand K. Singh; Sanjay Kumar; B.K. Singh
Fifteen parental lines and their 36 hybrids were evaluated for heterosis and inbreeding depression of fruit characters, viz. fruit length, weight per fruit, number of fruits per plant and fruit yield per plant. The positive heterosis desirable for length of fruit, weight per fruit, number of fruits per plant and fruit yield per plant was common in most of the crosses. Most of the crosses showed positive and significant heterosis over standard variety and better parent. The cross combination BSC-1 × BSC-2, BSC-1 × CHC-1, VRC-11-2 × CC-5 and CC-7 × CHC-1 showed highly positive and significant heterosis over standard variety and better parent and can be utilized in heterosis breeding programme for the improvement of yield in cucumber. In general, crosses showed significant heterosis in F1 and also revealed inbreeding depression in F2 population.
Molecular phylogeny of Aplosporella abexaminans: a novel species revealing the second report of sexual-asexual connection in Aplosporellaceae (Botryosphaeriales) from India
(Magnolia Press, 2021) Sanjeet Kumar Verma; Sanjay Yadav; Raghvendra Singh
Aplosporella abexaminans, a new sexual morph fungus belongs to family Aplosporellaceae, was discovered on the bark of stem of Murraya koenigii (Rutaceae) and identified by morphological characteristics and analysis of combined ITS and LSU sequence data. This is the second report of a sexual morph with molecular evidence for this genus and the second record of conidiogenesis and chlamydospores associated with the asexual state of this family. It is characterized by its larger ascostromata, locules without ostioles, thinner locule peridium, two to multi-layered, larger asci, surrounded by an additional hyaline sac like structure, larger and hyaline to light olivaceous ascospores, asexual state without conidiomata formation, conidiogenous cells light brown to brown, conidia brown without granular content, smooth and presence of chlamydospores. The sexual morph of Aplosporella abexaminans resembles Bagnisiella and the asexual morph resembles Aplosporella, thus proving the sexual-asexual connection for the second time for this family. © 2021 Magnolia Press.
Morpho-cultural and molecular phylogenetic characterisation of Curvularia verruculosa causing leaf spot and blight disease on Strychnos potatorum – A new record from India
(Academic Press, 2024) T.S. Kripa; Shambhu Kumar; K.T. Mufeeda; Jain Mary Jose; S. Mahadevakumar; Raghvendra Singh
Strychnos potatorum L.f., is a well-known medicinal plant found in peninsular India and Sri Lanka, which is widely used in traditional and modern medicines for curing various kinds of diseases. In January 2020, while conducting a foliar fungal disease investigation in Kerala, India, a leaf spot and blight disease was spotted on S. potatorum. The pathogen was isolated and identified as Curvularia verruculosa based on symptomatic studies, culture characteristics, conidial morphology, multigene (ITS-LSU-GAPDH-TEF1-α) molecular sequences analysis, and concatenate multigene (ITS-GAPDH-TEF1-α) phylogeny. Koch's postulates were evaluated in vitro, and similar symptoms and re-isolation of the pathogen confirmed the association of C. verruculosa with leaf spot and blight disease. To our knowledge, this is the first report of C. verruculosa causing foliar disease on S. potatorum in India. © 2023 Elsevier Ltd
Morphological and molecular characterization of Lasiodiplodia theobromae associated with leaf spot and blight disease of Coscinium fenestratum (Gaertn.) Colebr.-a new host record from India
(Oxford University Press, 2023) Jain Mary Jose; Shambhu Kumar; Merin Johnson; K.T. Mufeeda; T.S. Kripa; S. Mahadevakumar; Raghvendra Singh
Coscinium fenestratum is a medicinally significant critically endangered plant found in Western Ghats of India. The leaf spot and blight was observed in Kerala during 2021 with disease incidence of 40% in 20 assessed plants in 0.6 hectare. The associated funguswas isolated on potato dextrose agar medium. A total of six morpho-culturally identical isolates were isolated and morphologically identified. Based on morpho-cultural features, the fungus was identified at genus level as Lasiodiplodia sp., which was further authentically confirmed as Lasiodiplodia theobromae by molecular identification with a representative isolate (KFRIMCC 089) using multigene (ITS, LSU, SSU, TEF1-α, and TUB2) sequence analysis and concatenated phylogenetic analysis (ITS-TEF1-α-TUB2). Pathogenicity tests were also assessed in vitro and in vivo using mycelial disc and spore suspension of L.Theobromae, and the isolated fungus's pathogenic behaviour was confirmed after re-isolation and morpho-cultural features. Literature survey reveals that there are no reports of L.Theobromae on C. fenestratum from all over the world. Hence, C. fenestratum is being firstly reported as a new host record for L.Theobromae from India. © 2023 Blackwell Publishing Ltd. All rights reserved.
Morphology and phylogeny of a new species, Pseudocercospora haldinae (Mycosphaerellaceae) on Haldina cordifolia from India
(Magnolia Press, 2021) Sanjay Yadav; Sanjeet Kumar Verma; Vinay Kumar Singh; Raghvendra Singh; Archana Singh; Shambhu Kumar
Pseudocercospora haldinae, a new anamorphic foliicolous hyphomycetous fungus discovered on living leaves of Haldina cordifolia (Rubiaceae) is taxonomically described and illustrated. This species is compared with closely related species of Pseudocercospora and other dematiaceous cercosporoid forms reported on the same host genus. The phylogeny of this species has been inferred from partial nuclear ribosomal 28S large subunit (LSU) and complete internal transcribed spacer (ITS) rDNA sequence data. On the basis of LSU, P. haldinae represents characteristic features of Pseudocercospora s. str. and did not form red crystals when cultivated on agar media. © 2021 Magnolia Press. © 2021 Magnolia Press. All rights reserved.
Morphology and phylogeny of Pseudocercospora trifoliorum sp. nov. (Mycosphaerellaceae) on Grona triflora from India
(Magnolia Press, 2025) Soumyadeep Rajwar; Raghvendra Singh; S. Saran Kumar; Paras Nath Singh; Alok Kumar Singh
Pseudocercospora trifoliorum, a newly discovered foliicolous hyphomycetous fungus on Grona triflora (Fabaceae), is taxonomically described and illustrated. Its phylogeny was determined using LSU, RPB2, and ITS regions to analyze evolutionary relationships. The taxon is compared to closely related Pseudocercospora species through morphological traits and molecular analysis, improving insights into its classification and evolutionary relationships. © 2025 Magnolia Press.
Morphology and phylogeny of Teratoramularia rumicis—a new foliar pathogen of Rumex crispus from India and diversity of Ramularioid complex on Rumex spp.
(Magnolia Press, 2021) Sanjeet Kumar Verma; Prakash Kushwaha; Sanjay Yadav; Raghvendra Singh
Teratoramularia rumicis, a new hyaline anamorphic foliicolous hyphomycetous fungus was discovered on living leaves of medicinally important plant Rumex crispus (Polygonaceae) is described and illustrated. It is an obligate foliar pathogen that causes silvery white foliar disease. It is the first report of Teratoramularia from India. This species is compared with closely related species of Teratoramularia and species of Ramularioid complex along with dematiaceous cercosporoid forms reported on the same host genus and family. The phylogeny of this species has been inferred from combined 28S nrRNA gene (LSU) and internal transcribed spacer regions and intervening 5.8S nrRNA gene (ITS) of the nrDNA operon. Copyright © 2021 Magnolia Press