COMPLEMENTARY SEX DETERMINATION IN HYMENOPTERAN PARASITOIDS AND ITS IMPLICATIONS FOR BIOLOGICAL CONTROL
膜翅目寄生蜂的互补性别决定机制及其在生防上的意义(英文)作者机构：Department of EntomologyUniversity of MinnesotaSt.PaulMN55108USA Beneficial Insects Introduction Research LaboratoryUSDA-ARSUniversity of DelawareDE19713USA Department of EntomologyNorth Dakota State UniversityFargoND58105USA Department of Plant ProtectionFufian Agriculture & Forestry UniversityFuzhouFujian 350002P.R.China
出 版 物：《Entomologia Sinica》 (中国昆虫科学（英文版）)
年 卷 期：2003年第10卷第2期
页 面：81-94页
核心收录：
主 题：Complementary sex determination (CSD) Hymenoptera diploid males biological control
摘 要：In haplodiploid Hymenoptera, unfertilized eggs produce haploid males while fertilized eggs lead to diploid females under most circumstances. Diploid males can also be produced from fertilization under a system of sex determination known as complementary sex determination (CSD). Under single-locus CSD, sex is determined by multiple alleles at a single sex locus. Individuals heterozygous at the sex locus are female while hemizygous and homozygous individuals develop as haploid and diploid males, respectively. In multiple-locus CSD, two or more loci, each with two or more alleles, determine sex. Diploid individuals are female if one or more sex loci are het-erozygous, while a diploid is male only if homozygous at all sex loci. Diploid males are known to occur in 43 hym-enopteran species and single-locus CSD has been demonstrated in 22 of these species. Diploid males are either developmentally inviable or sterile, so their production constitutes a genetic load. Because diploid male production is more likely under inbreeding, CSD is a form of inbreeding depression. It is crucial to preserve the diversity of sex alleles and reduce the loss of genetic variation in biological control. In the parasitoid species with single-locus CSD, certain precautionary procedures can prevent negative effects of single-locus CSD on biological control.
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