MOLECULAR EVIDENCE FOR THE ORIGIN OF THE S-DERIVED GENOMES OF POLYPLOID TRITICUM SPECIES

被引：47

作者：

TALBERT, LE ^{[1
]}

MAGYAR, GM ^{[1
]}

LAVIN, M ^{[1
]}

BLAKE, TK ^{[1
]}

MOYLAN, SL ^{[1
]}

机构：

[1] MONTANA STATE UNIV,DEPT BIOL,BOZEMAN,MT 59717

来源：

AMERICAN JOURNAL OF BOTANY | 1991年 / 78卷 / 03期

关键词：

D O I：

10.2307/2444956

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The genus Triticum includes several polyploid species that arose due to hybridization between two or more diploid species. Section Sitopsis is comprised of five diploid species given the genome designation S. Four polyploid species are recognized that contain an S or S-derived genome. We have used two repetitive DNA sequences found primarily in the S genomes of Triticum to determine the likely diploid progenitors of the polyploid species. Comparison of restriction fragments that hybridize to probes for these sequences suggests that T. speltoides is distinct from other members of section Sitopsis (i.e., T. longissimum, T. bicorne, T. searsii, and T. sharonense). The S-derived genome of T. aestivum is more closely related to T. speltoides than to the other Sitopsis diploids. The restriction fragment pattern of T. timopheevii is 98% identical to that of T. speltoides, while those of T. kotschyi and T. syriacum are identical to the group of diploids represented by T. longissimum, T. bicorne, T. searsii, and T. sharonense. Our results are compatible with previous molecular and biochemical data regarding relationships among Triticum species containing an S or S-derived genome.

引用

页码：340 / 349

页数：10

共 43 条

[1] GENETIC-RELATIONSHIPS IN THE SITOPSIS SECTION OF TRITICUM AND THE ORIGIN OF THE B-GENOME OF POLYPLOID WHEATS [J].