EVIDENCE OF A PARTIAL REPRODUCTIVE BARRIER BETWEEN WILD AND CULTIVATED PEARL MILLETS (PENNISETUM-GLAUCUM)

被引:17
作者
AMOUKOU, AI [1 ]
MARCHAIS, L [1 ]
机构
[1] ORSTOM,F-34032 MONTPELLIER 1,FRANCE
关键词
DOMESTICATION; HYBRID BARRIER; SEED MALFORMATION; SPECIATION; GENETIC IMBALANCE; PEARL MILLET; PENNISETUM-GLAUCUM;
D O I
10.1007/BF00022720
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The occurrence of seed malformation in association with reduced thousand grain weight and germination ability has been observed in crosses between cultivated female plants and wild male plants. A survey of 16 cultivated accessions (P. glaucum subsp. glaucum) and 11 wild accessions (P glaucum subsp. monodii) ranging over the whole species diversity showed this postzygotic incompatibility was general, but its intensity varied greatly with the cultivated female accession used and very little with the wild male parent origin. About 15 % of the 123 cultivated x wild crosses observed gave normal seeds. Seed malformation has never been observed in crosses between cultivated accessions and appeared independent of genetic distances between the parents. The reciprocal crosses between wild female plants and cultivated male plants gave normal-looking seeds with good germination but consistently reduced thousand grain weight. Both seed malformation and seed small size are an expression of a genetic imbalance. These slight reproductive barriers seem to have been built during the domestication process.
引用
收藏
页码:19 / 26
页数:8
相关论文
共 24 条
[11]   BIMODAL PHENOTYPIC STRUCTURE OF 2 WILD PEARL-MILLET SAMPLES COLLECTED IN AN AGRICULTURAL AREA [J].
MARCHAIS, L ;
TOSTAIN, S .
BIODIVERSITY AND CONSERVATION, 1992, 1 (03) :170-178
[12]  
MARCHAIS L, 1985, Z PFLANZENZUCHT, V95, P245
[13]  
MOHINDRA V, 1991, EUPHYTICA, V56, P1
[14]  
NEUFFER MG, 1980, GENETICS, V95, P929
[15]  
NIANGADO O, 1981, THESIS U PARIS 11 OR
[16]  
PERNES J, 1980, ANN AMELIOR PLANT, V30, P253
[17]  
REYHERME C, 1982, THESIS U PARIS 11 OR
[18]   GAMETOPHYTIC COMPETITION AS INFLUENCING GENE FLOW BETWEEN WILD AND CULTIVATED FORMS OF PEARL-MILLET (PENNISETUM-TYPHOIDES) [J].
ROBERT, T ;
LESPINASSE, R ;
PERNES, J ;
SARR, A .
GENOME, 1991, 34 (02) :195-200
[19]  
SHERIDAN WF, 1980, GENETICS, V95, P945
[20]   THE INFLUENCE OF GENOTYPE AND ENVIRONMENT ON SEED AND EMBRYO DEVELOPMENT IN BARLEY (HORDEUM-VULGARE L) AFTER CROSSING WITH HORDEUM-BULBOSUM L [J].
THORN, EC .
EUPHYTICA, 1992, 59 (2-3) :109-118