Indian Society of Genetics & Plant Breeding

Genetics of traits associated with shoot fly resistance in post-rainy season sorghum (Sorghum bicolor L.)

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Generation mean analyses were carried out to study
genetics of traits associated with shoot fly resistance in
three crosses using male sterile susceptible female and
resistant male parents (104B x IS18551, 104B x IS2312 and
104B x RSE03) during 2006-07 at two locations. The mean
performance of families showed that resistance as
indicated by lower deadheart percentage is governed by
recessive genes. Both additive and nonadditive gene
actions were important for resistance, and this trait is
influenced by environment. The line RSE 03 was a better
source of resistance with relatively simple genetics for
shoot fly resistance and component traits. Indirect
selection through the component traits such as glossiness
and seedling height which were under the control of
additive genes would be effective for developing sorghum
varieties resistant to shoot fly infestation.

Keywords: Epistasis, additive-dominance model, generation mean analysis, shoot fly resistance, Sorghum bicolor (L.)


Year: 2011
Volume: 71
Issue: 1
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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