Genotype-environment interactions for predicting the breeding value of bi-parental crosses in spring barley
✍ Scribed by R. M. Habgood
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 450 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0014-2336
No coin nor oath required. For personal study only.
✦ Synopsis
Crosses in spring barley between parental combinations classified by their G x E interactions as 'similar' or 'dissimilar'
were compared for both the expression of heterosis in Fr and for the amount of variation released in F2. Such classification could not reliably identify the most heterotic Ft hybrids, but FZ variation was generally higher in the 'dissimilar' cross combinations. Examination of yield components of parental and FZ populations further showed that yield of single plants was affected primarily by tiller number, which was generally not heritable in F2. Single plant selection was suggested to be most useful when based on grain number per ear. number per ear, a conclusion which has also been reached by VALENTINE (1979) amongst others. However, this does not resolve the limitations of selection in a single environment when large genotype-environment interactions are known to occur.