Generation means analysis of the twin-ear trait in maize

Article Abstract:

The penetrance and expressivity of the twin-ear trait in corn are investigated using generation means analysis. Hybridization studies reveal that the penetrance of the twin-ear trait was controlled by additive genetic effects with a contribution from epistatic effects in some cases. Further, the non-twin-ear trait exhibits complete dominance over the twin-ear trait. There are also indications that trait penetrance and expressivity are dependent on particular conditions during the plant's ontogenetic development.

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Genetic variability as affected by selection in Iowa Stiff Stalk Synthetic Maize

Article Abstract:

Research was conducted on Iowa Stiff Stalk Synthetic maize (BSSS) to determine the effects of recurrent selection on genetic variability. A cross-class classification mating design was used to develop the half-sib and full-sib families to be observed. Results showed that recurrent selection increased the number of favorable alleles and subsequently decreased the dominance variation for a majority of the traits.

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Estimates of genetic variance in an F2 maize population

Article Abstract:

Estimates of genetic variance in an F2 maize population are presented.

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