The influence of genes and exotic germplasm on genetic and phenotypic variability of yield in maize
2001
Zivanovic, T. | Surlan-Momirovic, G. (Poljoprivredni fakultet, Beograd - Zemun (Yugoslavia))
The investigations included mean values, genetic variability and phenotypic variability, heritability and genetic and phenotypic coefficients variability yield in basic maize with 25% of the exotic germplasm incorporated and also, in the population after three and five cycles of gene recombinating. To investigate influence of different cycles of gene recombinations, the trial was established after Nested Design method in two replications, on two locations. On the basis of the results obtained, it was concluded that the mean values had increased more significantly to the third than from the third to the fifth cycle of free hybridization. The additional gene recombinations influenced on the nonsignificant decrease of the genetic and phenotypic variability of grain yield. Estimated values of heritability were high and significant for yield, which indicates that they are mostly determined by the additive variance. The additional cycles of gene recombinations caused the decrease of heritability and coefficient of genetic and phenotypic variability. Bigger grain yield after three and fifth gene recombination cycles, relating to the basic population, indicates to the positive effect of the additional recombination cycles to the increase of gene frequency in case of desirable traits, and the frequency of the more yielding genotypes.
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Эту запись предоставил Unassigned data from Yugoslavia