SEX-RATIO VARIATION IN FEMALE-BIASED POPULATIONS OF NOTOSTRACANS

被引：64
|
作者：
SASSAMAN, C
机构：
[1] Department of Biology, University of California, Riverside, 92521, CA
来源：
HYDROBIOLOGIA | 1991年 / 212卷
关键词：
TRIOPS; SEX RATIO; GENETICS; SELFING;
D O I：
10.1007/BF00025998
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
Females from female-biased populations of the notostracan Triops newberryi produce viable eggs when reared in isolation. Clutches produced under such conditions exhibit sex-ratio polymorphism. One category of females (monogenics) produces only female offsprings; the second category (amphigenics) produces clutches with a sex ratio of 3 females:1 male. The relative proportions of thc two categories of females varies significantly between populations and is correlated with population sex ratio. This correlation, and the pattern of offspring distribution in amphigenics, suggests that sex is determined by an autosomal Mendelian gene locus for which the male-determining allele is recessive. Limited pedigree analysis of lineages under selfing support the genetic model.
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页码：169 / 179
页数：11
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