Indian Society of Genetics & Plant Breeding

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GENERATION MEAN ANALYSIS OF GRAIN YIELD AND SOME PANICLE CHARACTERS IN TWO EXOTIC X INDIAN RABI SORGHUM CROSSES

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Generation mean analysis was carried out in six generations of two crosses involving an
exotic (E 36-1), a local (M 35-1), and an improved variety (SPV 86) of rabi sorghum in respect
ofgrain yield and its components. The scaling test and joint scaling tests indicated presence
of nonallelic interaction for all the traits in both crosses except for primaries per panicle.
Generation mean analysis showed importance of dominance gene effect, followed by
. additive X additive and dominance X dominance with a small proportion of additive gene
effect. Digenic interactions were completely absent for primaries per panicle while a still
higher order gene interaction was indicated for panicle width in the cross E36-1 X M 35-1.
Breeding methods which can simultaneously exploit both additive and nonadditive gene
effects are suggested.
 

Keywords: Scaling tests, generation means, gene effects, sorghum.

Info

Year: 1994
Volume: 54
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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