Heterosis and Combining Ability Studies in Sesame (Sesamum indicum L.)
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Date
2019-07-01
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Agriculture University, Jodhpur
Abstract
An experiment entitled “Heterosis and combining ability studies in sesame
(Sesamum indicum L.)” was carried out during kharif season of 2018 at research farm
of Agricultural Research Station, Mandor, Jodhpur. The experiment comprised of
twelve parents, their twenty seven crosses and one check, was shown in randomized
block design with three replications. The analysis of variance for all the characters
revealed that genotypes, parents and hybrids showed significant differences for most
of characters expect oil content for parents indicating the presence of sufficient
variability in the study material.
On the basis per se performance, parents viz., RT-54, RT-103, RT-371 and
RT-372 were found promising and crosses viz., RT-351 × TKG-22, RT-351 × RT-377
and RT-54 × TKG-22 were revealed better performance for seed yield per plant.
Cross, RT-351 × TKG-22 depicted the highest heterosis, heterobeltiosis and standard
heterosis.
In combining ability analysis, the extent of GCA variance was lower than
SCA variance for most of the characters demonstrating the predominance of non additive gene action except oil content. Based on gca effects, TKG-22, GT-10 and
RT-372 were good general combiner for seed yield and some of the component
characters. Crosses, RT-351 × TKG-22 and RT-54 × RT-372 were most promising
hybrids for seed yield and these crosses involved average × good and average ×
average parents and could be exploited for heterosis breeding or to produce for
desirable segregants for sesame crop improvement.
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Citation
Sirohi Sushila 2019. Heterosis and Combining Ability Studies in Sesame (Sesamum indicum L.). M.Sc. thesis, College of Agriculture, Agriculture University, Jodhpur.