Indian Society of Genetics & Plant Breeding

Important

COMBINING ABILITY FOR YIELD, PHENOLOGlCAL AND EAR CHARACTERS IN WHITE SEEDED MAIZE

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Seventy eight single cross hybrids involving thirteen diverse inbred lines and three
checks of maize (Zea mays L.) were evaluated in a simple lattice design (9 x 9
structure) with two replications in two environments viz, nonnal and stress. Combining
ability analysis revealed significant GCA variance for days to silking, ear length,
ear girth, number of rows/ear, number of kernels/row, shelling percent and grain
yield/plant in both the environments and SCA variance for ear length and shelling
percent in nonnal and grain yield/plant in stress environment. Preponderance of
additive gene effects was observed in the expression of all the characters studied.
Inbreds Pl, P2, P3 and P4 identified as good general combiners for early silking
in the present study can be used as the potential components for improving/developing
heterotic pool/population aimed at earliness. Under high plant density and rainfed
conditions the inbreds PS, P6, PS, P12 and Pl3 can be used to develop high yielding
white-seeded maize hybrids. Hybrid Pl x PS is suggested for further extensive
testing at different. locations under irrigated and rainfed conditions for critical
evaluation of its yield potential.
 

Keywords: Combining ability, white-seeded maize, grain yield.

Info

Year: 1998
Volume: 58
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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