存在连锁和基因关联时，双倍单倍体估计遗传方差。

Doubled haploids for estimating genetic variances in presence of linkage and gene association.

机构信息

Department of Crop Science, University of Guelph, Guelph, Ontario, Canada.

出版信息

Theor Appl Genet. 1979 May;55(3-4):129-32. doi: 10.1007/BF00295438.

Abstract

The effect of gene association (or dispersion) and linkage on the estimation of genetic variances in a diallel experiment involving doubled haploid lines is evaluated. It is shown that the estimates of the additive and the additive X additive genetic variances, as obtained by Choo et al. (1979), are biased if genes are linked or are not independently distributed in the parents. However, this bias only occurs in the presence of interaction between homozygous loci. Gene association (or dispersion) and linkage, if present, can be detected by comparing the parental vs the crosses mean, the parental vs the doubled haploid lines variance, and the among vs the within crosses variance.

摘要

评价了在涉及双单倍体系的完全双列杂交试验中基因关联（或分散）和连锁对遗传方差估计的影响。结果表明，如果基因连锁或在亲本中不独立分布，Choo 等人（1979）得到的加性和加性 X 加性遗传方差的估计是有偏的。然而，这种偏差仅在纯合位点之间存在互作时才会发生。如果存在基因关联（或分散）和连锁，可以通过比较亲本与杂交种均值、亲本与加倍单倍体系方差、以及杂交种间与杂交种内方差来检测。