PHENOTYPIC CHARACTERIZATION OF F3 PROGENIES AND INHERITANCE STUDY ON PHYLLODY RESISTANCE IN SESAME (Sesamum indicum L.)
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Date
2010-07-30
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UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
Abstract
A Study on the genetic analysis of some quantitative characters and on the nature of inheritance of phyllody resistance in sesame (Sesamum indicum L.) was carried out at Agriculture College, Raichur. Straight and reciprocal crosses were effected between E8, which is white seeded, agronomically superior variety but susceptible to phyllody and TNL brown seeded locally identified phyllody resistant land race during kharif-2006. The F1 and F2 were grown in net house during kharif-2007 and kharif-2008 respectively. A total of 149 F3 families of E8xTNL and 32 of TNL x E8 were raised in augmented design using nine checks. High phenotypic and genotypic co variances were observed for number of branches per plant, number of capsules per plant, distance from ground to first capsule, 1000 seed weight and seed yield per plant. High heritability and genetic advance as per cent mean was observed for 1000 seed weight, number of branches per plant, seed yield per plant, number of capsules per plant, distance from ground to first capsule, days to 50 per cent flowering, plant height and capsule length. Number of capsules per plant showed maximum positive association with seed yield. Path co-efficient analysis revealed maximum positive direct effect of number of capsules per plant. The F3 families of E8 x TNL segregated into 94 resistant and 55 susceptible families which fitted to 9:7 ratio (complementary gene interaction). The F3 segregation analysis revealed that two independently assorting dominant genes govern phyllody resistance.
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