Indian Society of Genetics & Plant Breeding

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COMBINING ABILITY, HETEROSIS AND INBREEDING DEPRESSION FOR YIELD AND YIELD COMPONENTS IN YELLOW SARSON

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Combining ability, heterosis and inbreeding depression were estimated in yellow sarson
for 11 quantitative characters. Nonadditive genetic variance was preponderant for all
characters in both Fl and F2 generations except for IllOO-seed weight in F2 generation. The
parents 66-197-3 and YSIK-742 in Fl generation, and RAUYS-3 in F2 generation were the
best general combiners. For seven characters, the best F2S on the basis of sea involves one
parent with high gca effect and the other with poor or average gca effects. The hybrids
which exhibited highest heterosis also showed higher inbreeding depression. Heterosis
over better parent was highest for siliquae/plant (162.9'Y,,), followed by economic
yield/plant (129.4%), biological yield/plant (118.7%), and primary branches/plant
(88.1%).
 

Keywords: Yellow sarson, combining ability, heterosis, inbreeding depression

Info

Year: 1997
Volume: 57
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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