Quantitative Genetics and Breeding Methods in Autopolyploid Plants by André Gallais

Author:André Gallais
Language: eng
Format: epub
ISBN: 9782738010933
Publisher: Quae
Published: 2011-08-25T00:00:00+00:00

b) Comparison of duplex and diploid variances

The genotypic value of a duplex can also be written using a model similar to that for diploids. Thus

However, because of the doubling effect, generally μDup ≠ μ2x, Dupα‘i ≠ 2xαi and Dupβ’ij ≠ 2xβ ij . Therefore, the variance of a duplex population is expected to be different from the variance of the isogenic non inbred diploid population. The correlation between diploid and duplex value, which interests the plant breeder, is difficult to predict, but it will generally be less than 1. The covariance between a diploid plant ij and its isogenic duplex can be written as

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