Читать книгу Principles of Plant Genetics and Breeding - George Acquaah - Страница 174
Evaluating parental germplasm
ОглавлениеA useful application of heritability is in evaluating the germplasm assembled for a breeding project to determine if there is sufficient genetic variation for successful improvement to be pursued. A replicated trial of the available germplasm is conducted and analyzed by ANOVA as follows:
| Source | df | EMS |
| Replication | r−1 | |
| Genotypes | g−1 | σ2 + rσ2g |
| Error | (r−1)(g−1) | σ2 |
From the analysis, heritability may be calculated as
Whether the estimate is heritability in the narrow or broad sense depends on the nature of the genotypes. Pure lines or inbred lines would yield additive type of variance, making the estimate narrow sense. Segregating population would make the estimate broad sense.
