SEX DETERMINATION IN THE GENUS OREOCHROMIS .2. SEX REVERSAL, HYBRIDIZATION, GYNOGENESIS AND TRIPLOIDY IN OREOCHROMIS-AUREUS STEINDACHNER

被引：70

作者：

MAIR, GC ^{[1
]}

SCOTT, AG ^{[1
]}

PENMAN, DJ ^{[1
]}

SKIBINSKI, DOF ^{[1
]}

BEARDMORE, JA ^{[1
]}

机构：

[1] UNIV COLL SWANSEA,SCH BIOL SCI,SWANSEA SA2 8PP,W GLAM,WALES

来源：

THEORETICAL AND APPLIED GENETICS | 1991年 / 82卷 / 02期

关键词：

SEX DETERMINATION; OREOCHROMIS-AUREUS; GYNOGENESIS; SEX REVERSAL; HYBRIDIZATION;

D O I：

10.1007/BF00226206

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Sex ratios from 62 single-pair matings of normal broodstock O. aureus were highly heterogenous with an overall deficit of males (41.4%). Peaks in the sex ratio frequency distribution occurred at 1:1, 3:5 and 1:3 (male:female). Hybridisation of O. aureus with O. mossambicus, O. spilurus and O. niloticus produced highly variable sex ratios, suggesting a complexity of hybrid sex determination. Few valid inferences could be made regarding intraspecific sex determination from these hybrid data. Sex ratios from progeny testing of sex-reversed males (1:3) and most sex-reversed females (1:0) provide evidence for female heterogamety in O. aureus. Several aberrant ratios observed suggest Mendelian inheritance of an autosomal recessive gene (F,f), epistatic to the major sex-determining gene (W,Z). Sex ratios of triploids and gynogens support the hypothesis of recombination between the centromere and the major sex-determining locus. Progeny testing of a female mitogyne demonstrated the viability of a novel WW "superfemale", which gave only female offspring. Not all data could be explained by a two-factor model of sex determination. Further exceptional sex ratios may be accounted for by rare autosomal or environmental sex-modifying factors. It is concluded that O. aureus has a multifactorial mechanism of sex determination with the underlying primary mechanism of female heterogamety.

引用

页码：153 / 160

页数：8

共 30 条

[1]

AVTALION RR, 1978, BAMIDGEH, V30, P110

[2]

Bull J.J., 1983, EVOLUTION SEX DETERM

[3]

Chen F. Y., 1969, Verh. int. Ver. Limnol., V17, P719

[4] PRODUCTION OF WW SUPER FEMALES BY DIPLOID GYNOGENESIS IN XENOPUS-LAEVIS [J].

COLOMBELLI, B ;

THIEBAUD, CH ;

MULLER, WP .

MOLECULAR & GENERAL GENETICS, 1984, 194 (1-2) :57-59

[5]

Fishelson L., 1962, FISHERMANS BULLET, V4, P14

[6]

GUERRERO RD, 1974, PROG FISH CULT, V36, P56, DOI 10.1577/1548-8659(1974)36[56:AASMFS]2.0.CO

[7]

[8]

GUERRERO RD, 1975, T AM FISH SOC, V104, P342, DOI 10.1577/1548-8659(1975)104<342:UOAFTP>2.0.CO

[9]

[10] SEX DETERMINATION IN SAROTHERODON (TILAPIA) .2. SEX-RATIO AS A TOOL FOR THE DETERMINATION OF GENOTYPE - MODEL OF AUTOSOMAL AND GONOSOMAL INFLUENCE [J].

HAMMERMAN, IS ;

AVTALION, RR .

THEORETICAL AND APPLIED GENETICS, 1979, 55 (3-4) :177-187

← 1 2 3 →