SEX DETERMINATION IN THE GENUS OREOCHROMIS .1. SEX REVERSAL, GYNOGENESIS AND TRIPLOIDY IN OREOCHROMIS-NILOTICUS (L)

被引：93

作者：

MAIR, GC ^{[1
]}

SCOTT, AG ^{[1
]}

PENMAN, DJ ^{[1
]}

BEARDMORE, JA ^{[1
]}

SKIBINSKI, DOF ^{[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-NILOTICUS; GYNOGENESIS; SEX REVERSAL; TRIPLOIDY;

D O I：

10.1007/BF00226205

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Established techniques of genetic manipulation were used to elucidate sex-determining mechanisms in the commercially important tilapia, Oreochromis niloticus. Analysis of sex ratios from single-pair matings of normal broodstock showed these to be heterogeneous, with an asymmetrical frequency distribution. Data were homogeneous, with the exclusion of a number of broods with sex ratios not significantly different from 3:1 (male:female), and further progeny testing revealed atypical female heterogamety in the parents of these broods. Analysis of sex ratios from complete diallele-type crosses using five males and five females demonstrated no association between male parent, female parent and progeny sex ratio. Sex ratios of gynogens (0:1) and triploids (1:1), and from progeny testing of sex-reversed males (0:1) and sex-reversed females (3:1), provide evidence for female homogamety in this species. Progeny testing of male gynogens derived from sex-reversed females demonstrated recombination between the centromere and the sex-determining locus (68.9%). Novel YY "supermales" were shown to be viable and produced all-male offspring. It was concluded that this species exhibits monofactorial, genotypic sex determination with male heterogamety. However, rare autosomal or environmental sex-modifying factors may account for occasional deviations from expected sex ratios.

引用

页码：144 / 152

页数：9

共 46 条

[1] GENETIC-MAPPING IN THE MEXICAN AXOLOTL, AMBYSTOMA-MEXICANUM [J].

ARMSTRONG, JB .

CANADIAN JOURNAL OF GENETICS AND CYTOLOGY, 1984, 26 (01) :1-6

[2] DETERMINATION OF ALLOGENEIC AND XENOGENEIC MARKERS IN GENUS OF TILAPIA - IDENTIFICATION OF T AUREA, T VULCANI AND T NILOTICA BY ELECTROPHORETIC ANALYSIS OF THEIR SERUM-PROTEINS [J].

AVTALION, RR ;

DUCZYMINER, M ;

WOJDANI, A ;

PRUGININ, Y .

AQUACULTURE, 1976, 7 (03) :255-265

[3]

AVTALION RR, 1978, BAMIDGEH, V30, P110

[4]

Bull J.J., 1983, EVOLUTION SEX DETERM

[5] SEX-RATIOS OF PROGENY FROM MASS SPAWNINGS OF SEX-REVERSED BROODSTOCK OF TILAPIA-NILOTICA [J].

CALHOUN, WE ;

SHELTON, WL .

AQUACULTURE, 1983, 33 (1-4) :365-371

[6]

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

[7] ADAPTIVE VARIATION IN ENVIRONMENTAL AND GENETIC SEX DETERMINATION IN A FISH [J].

CONOVER, DO ;

HEINS, SW .

NATURE, 1987, 326 (6112) :496-498

[8]

CREW FAE, 1965, SEX DETERMINATION

[9]

EBELING AW, 1970, T AM FISH SOC, V1, P131

[10]

Fisher RA., 1930, GENETICAL THEORY NAT, DOI 10.5962/bhl.title.27468

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