Effects of genotype-environment interactions on genetic correlations
1993
Aastveit, A.H. (Agricultural University of Norway, Aas (Norway). Dept. of Mathematical Science) | Aastveit, K.
The objective of the work presented here was to investigate the influence of genotype-environment interaction on genetic correlations. In the theoretical models plant populations were considered consisting of random samples of lines from chromosome- doubled haploids produced from F1 gametes, highly inbred SSD-lines, and clones of randomly breeding populations grown in two and multiple environments. The results of these theoretical considerations are that if genotype-environment interaction exists, great differences are expected to occur in the estimates of genetic correlation coefficients obtained in different environments. Based on the variance and covariance components for genotype-environment interaction a new type of correlation coefficient, called genotype-environment correlation, r(ge) is suggested. This theory has been applied to several series of experiments. Estimates are presented from two series, both of which demonstrate clearly the consequences of genotype-environment interaction on the genetic correlations.
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