Evolution of sex ratio through gene loss
Evolution of sex ratio through gene loss
复制标题
基因丢失导致性别比的演变
DOI:
10.1073/pnas.1903925116
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发表时间:
2019
影响因子:
11.1
通讯作者:
Haag, Eric S.
中科院分区:
文献类型:
--
作者:
Yin, Da;Haag, Eric S.
The maintenance of males at intermediate frequencies is an important evolutionary problem. Several species ofCaenorhabditisnematodes have evolved a mating system in which selfing hermaphrodites and males coexist. While selfing produces XX hermaphrodites, cross-fertilization produces 50% XO male progeny. Thus, male mating success dictates the sex ratio. Here, we focus on the contribution of themale secreted short(mss) gene family to male mating success, sex ratio, and population growth. Themssfamily is essential for sperm competitiveness in gonochoristic species, but has been lost in parallel in androdioecious species. Using a transgene to restoremssfunction to the androdioeciousCaenorhabditis briggsae,we examined how mating system and population subdivision influence the fitness of themss+genotype. Consistent with theoretical expectations, whenmss+andmss-null (i.e., wild type) genotypes compete,mss+is positively selected in both mixed-mating and strictly outcrossing situations, though more strongly in the latter. Thus, while sexual mode alone affects the fitness ofmss+, it is insufficient to explain its parallel loss. However, in genetically homogenous androdioecious populations,mss+both increases male frequency and depresses population growth. We propose that the lack of inbreeding depression and the strong subdivision that characterize naturalCaenorhabditispopulations impose selection on sex ratio that makes loss ofmssadaptive after self-fertility evolves.
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影响因子:
3.3
作者:
Johnson,TE;Hutchinson,EW
通讯作者:
Hutchinson,EW
影响因子:
3.7
作者:
Gavin C. Woodruff;C. Knauss;T. Maugel;E. Haag
通讯作者:
E. Haag
影响因子:
2.1
作者:
Chasnov, J. R.
通讯作者:
Chasnov, J. R.
DOI:
10.1086/285476
发表时间:
1993
期刊:
The American Naturalist
影响因子:
--
作者:
S. Otto;C. Sassaman;M. Feldman
通讯作者:
M. Feldman
DOI:
10.1016/j.tig.2012.02.007
发表时间:
2012
期刊:
Trends in genetics : TIG
影响因子:
--
作者:
Thomas,CristelG;Woodruff,GavinC;Haag,EricS
通讯作者:
Haag,EricS