Whole-genome characterization of embryonic stage inbreeding depression in a selfed loblolly pine family.
Whole-genome characterization of embryonic stage inbreeding depression in a selfed loblolly pine family.
复制标题
自交火炬松家族胚胎期近交衰退的全基因组特征。
DOI:
10.1093/genetics/155.1.337
复制
发表时间:
2000
期刊:
影响因子:
3.3
通讯作者:
O'Malley,DM
中科院分区:
文献类型:
--
作者:
Remington,DL;O'Malley,DM
Inbreeding depression is important in the evolution of plant populations and mating systems. Previous studies have suggested that early-acting inbreeding depression in plants is primarily due to lethal alleles and possibly epistatic interactions. Recent advances in molecular markers now make genetic mapping a powerful tool to study the genetic architecture of inbreeding depression. We describe a genome-wide evaluation of embryonic viability loci in a selfed family of loblolly pine (Pinus taedaL.), using data from AFLP markers from an essentially complete genome map. Locus positions and effects were estimated from segregation ratios using a maximum-likelihood interval mapping procedure. We identified 19 loci showing moderately deleterious to lethal embryonic effects. These loci account for >13 lethal equivalents, greater than the average of 8.5 lethal equivalents reported for loblolly pine. Viability alleles show predominantly recessive action, although potential overdominance occurs at 3 loci. We found no evidence for epistasis in the distribution of pairwise marker correlations or in the regression of fitness on the number of markers linked to deleterious alleles. The predominant role of semilethal alleles in embryonic inbreeding depression has implications for the evolution of isolated populations and for genetic conservation and breeding programs in conifers.
登录
查看更多内容
DOI:
10.1086/282609
发表时间:
1969
期刊:
The American Naturalist
影响因子:
--
作者:
F. Sorensen
通讯作者:
F. Sorensen
影响因子:
2.2
作者:
FOWLER, DP;PARK, YS
通讯作者:
PARK, YS
影响因子:
3.3
作者:
J. Willis
通讯作者:
J. Willis
影响因子:
3.3
作者:
G. Namkoong;J. Bishir
通讯作者:
J. Bishir
DOI:
10.1017/s0016672300029256
发表时间:
1991-04-01
期刊:
GENETICAL RESEARCH
影响因子:
--
作者:
CHARLESWORTH, B;MORGAN, MT;CHARLESWORTH, D
通讯作者:
CHARLESWORTH, D