Inheritance of growth and yield traits in okra (Abelmoschus esculentus (L.) Moench
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Date
2018
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CCSHAU
Abstract
A field experiment was carried out at Research Farm of the Department of Vegetable Science, CCS Haryana Agricultural University for growth, yield traits and YVMV resistance. Four F1 hybrids namely, Hisar Naveen x Varsha Uphar, HB 25-2 x HB-32, HB-40 x HB-27 and HB-1157 x Pusa Sawani, hybrids along with their respective parents were sown during spring-summer 2016 to produce the seeds of F2, back crosses (B1 and B2) and fresh seeds of parents and F1 for evaluation. Six generations (P1, P2, F1, F2, B1 and B2) of four crosses were sown during Kharif 2016 in Compact Family Block Design to evaluate them for growth, yield, its traits and resistance to YVMV. The data collected from evaluation of six generations of four crosses were subjected to statistical analysis of correlation, path analysis and generation mean analysis. Study on association of traits revealed that selection for branches per plant, plant height, fruit weight, fruit length and number of fruits could improve the fruit yield per plant. Based on gene action studies in all the crosses dominance gene effects were greater than additive effects except in HB-40 x HB-27 cross additive gene effects were greater than dominance gene effects. Therefore, improvement in these crosses viz., Hisar Naveen x Varsha Uphar, HB 25-2 x HB-32 and HB-1157 x Pusa Sawani may be carried out in the later generations after reduction of non-additive components for yield and yield contributing traits. Breeding line HB-1157 was found resistant against the YVMV disease. Qualitative analysis for YVMV resistance using goodness of fit showed that the resistance to YVMV was governed by single dominant gene in HB-1157.
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