Browsing by Author "M. Shankar"

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Effect of moisture stress on key physiological traits in brinjal (Solanum melongena L.) cultivars
(Society for Plant Research, 2017) R. Gobu; B. N. Harish Babu; Kailash Chandra; M. Shankar; Om Prakash
Brinjal, commonly called as aubergine or eggplant need to have drought tolerant cultivars. Present investigation was carried out to identify the effect of moisture stress on key physiological traits and to identify the drought tolerant cultivars. Sixty five genotypes were transplanted after 30 days of sowing in three replications for moisture stress and normal conditions in pots having two plants per pot. The observations on plant height, root length, root: shoot ratio, SPAD chlorophyll reading, relative water content and membrane stability index were recorded in both moisture stress and non-stress plants. Change in percent mean under moisture stress conditions compared to non-stress conditions was computed and found that plant height, root length and relative water content was reduced by 30.86, 21.23 and 46.85 percent respectively, whereas root: shoot ratio, membrane stability index and SPAD chlorophyll Reading were increased by 10.19, 4.13 and 14.98 percent respectively in moisture stress condition compared to non-stress condition. Among the 65 genotypes, Pusa Shaymala, IIHR-7, IIHR-322, R-2585, L-3268, Pusa Purple Long, Annamalai, Long Green, Jawahar Brinjal-69, Jawahar Brinjal-64, Pusa Upkar, Early Round, Swarna Shyamali, Arka Shirish and Raidurga Green Round were found to be moisture stress tolerant cultivars. © 2017, SPR, All Rights Reserved.
Insight into the genetic diversity of eggplant (Solanum melongena L.) genotypes through D2 analysis
(Indian Society of Plant Breeders, 2017) R. Gobu; B.N. Harish Babu; Kailash Chandra; M. Shankar; Omprakash
The present investigation was carried out during Rabi 2014-15 at College of Horticulture, Hiriyur, Karnataka with 62 eggplant genotypes. Mahalanobis' D2 analysis was done to study the genetic diversity among the genotypes using 12 quantitative traits. Among the different traits studied, number of primary branches/plant contributed maximum towards total genetic divergence. D2 statistic grouped the genotypes into 11 diverse clusters. The inter cluster D2 value was maximum (3128.62) between cluster IX and XI which indicates that these clusters are diverse from each other. Crossing between the superior genotypes of above diverse cluster pairs may provide desirable transgressive segregants for developing high yielding varieties. Five genotypes namely R-2585, IIHR-355, Arka Kusumaker, IC420590 and R-2582 formed solitary clusters which hints at their uniqueness for most of the traits. Based on cluster mean scoring, cluster II ranked first indicating the presence of elite genotypes, which includes Punjab Barsati, IC104083, IVBL-9, Lal Gulab, IC90785, IC333527, Arka Abilash, IIHR-7 and Arka Kranti. So these genotypes can be extensively used for further breeding programme to generate new material.