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Combining ability and heterosis in diallel crosses of maize

โœ Scribed by B. S. Dhillon; J. Singh

Publisher
Springer
Year
1977
Tongue
English
Weight
435 KB
Volume
49
Category
Article
ISSN
0040-5752

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โœฆ Synopsis

The present investigation involved crosses among 20 elite yellow maize populations. These were evaluated in four environments in a randomized block design with four replications in each environment. Variety Cuba was observed to be the best general combiner for grain yield, followed by St Croix and Prolific. No clear association could be discerned between general combining ability (GCA) effects for grain yield and its components, and mean grain yield performance and GCA effects. Heterosis was observed in general and all the crosses involving Cuba yielded better than the midparent. The five hybrids, Kisan ร— Cuba, Antigua 3D ร— St Croix, Prolific ร— St Croix, Vijay ร— Antigua Gr. I and A 23 ร— Cuba, yielded more than the standard check. Significant yield superiority of these varietal hybrids over the best commercial composite (Jawahar) suggested the possibility of their commercial exploitation.

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