Inheritance of Indehiscent Capsule Character, Heritability and Genetic Advance Analyses in the Segregation Generations of Dehiscent x Indehiscent Capsules in Sesame

Abstract

The investigation was made to estimate heritability and genetic advance and thus understand the genetic behavior ofindehiscent capsule character in sesame with the fild experiments during three consecutive years. Muganli-57 (♀)parent with dehiscent capsule was crossed with ACS 344 (♂), an introduction material, which had indehiscent capsulecharacter. The results in the F1 generation indicated that dehiscent capsule character was dominant over indehiscentcapsule. In F2, 3:1 segregation ratio was monitored and further confimed in F3 showing indehiscent capsule characterwas controlled by a single recessive gene. Heritability was estimated by parent-offpring regression and the datawere collected in F1, F2 and F3 generations derived from the cross between dehiscent and indehiscent capsule types.Heritability estimates in narrow sense for number of branches, number of capsules per plant, 1000 seed weight and seedyield were low in indehiscent capsule types of F2. Genetic advance had also low values except for number of branches(30.79%). Whilst low values obtained for indehiscent capsule, dehiscent capsule types in F2 indicated high heritabilityfor the characters studied (70.52-92.84%). Stem height to the fist capsule and plant height were of high heritabilities inboth capsule types of F2 and F3. Although indehiscent capsule types had low means and heritabilities due to pleiotropiceffcts, mutant cross had heterotic effct on dehiscent types for all the characters. This positive shift could be explainedby additive gene effct and this information presented in this investigation was therefore highly benefiial for the geneticimprovement of sesame and reaching to high yielding types. This research also provides an example that bad parent mayhave a good progeny.