and combining ability for corn earworm injury among maize single crosses.
can be evidence of the involvement of cytoplasmic or maternal factors.
In most cases when significant reciprocal differences
were found, greater winter survival was achieved when the more cold-tolerant genotype was used as the seed parent, indicating a possible cytoplasmic effect.
Lack of reciprocal differences
indicates absence of maternal and extrachromosomal inheritance of tolerance to soil acidity.
An earlier analysis of [F.sub.1] progeny from this genotype had not indicated reciprocal differences (Gavin et al., 1989).
Segregation ratios in [F.sub.1] progeny from one of the genotypes, A70-34, showed significant (P [is less than] 0.05) reciprocal differences; there were greater than expected embryogenic plants when it was used as a female.
They also observed reciprocal differences
that suggested that endosperm genes of the seed that produced the maternal plant affected cob growth in culture.
virginica, and suggested that the reciprocal difference
in fertilization level between C.