Formation of unreduced gametes is impeded by homologous chromosome pairing in tetraploid Triticum turgidum x Aegilops tauschii hybrids

NWIPB OpenIR

	Formation of unreduced gametes is impeded by homologous chromosome pairing in tetraploid Triticum turgidum x Aegilops tauschii hybrids
	Wang, Chun-Jie 2; Zhang, Lian-Quan 2; Dai, Shou-Fen 2; Zheng, You-Liang 2; Zhang, Huai-Gang 3; Liu, Deng-Cai 1,2,3
	2010-10-01
发表期刊	EUPHYTICA
ISSN	0014-2336
卷号	175 期号:3 页码:323-329
文章类型	Article
摘要	It is believed that unreduced gametes with somatic chromosome numbers play a predominant role in natural polyploidization. Allohexaploid bread wheat originated from spontaneous hybridization of Triticum turgidum L. with Aegilops tauschii Coss. Unreduced gametes originating via meiotic restitution, including first-division restitution (FDR) and single-division meiosis (SDM), are well documented in triploid F(1) hybrids of T. turgidum with diploid Ae. tauschii (genomic constitution ABD, usually with 21 univalents in meiotic metaphase I). In this study, two T. turgidum lines known to carry genes for meiotic restitution were crossed to tetraploid Ae. tauschii. The resulting F(1) hybrids (genomes ABDD), had seven pairs of homologous chromosomes and regularly formed 14 univalents and seven bivalents at metaphase I. Neither FDR nor SDM were observed. The distribution of chromosome numbers among progeny obtained by self pollination and a backcross to T. turgidum showed the absence of unreduced gametes. These results suggest that high homologous pairing interfered with meiotic restitution and the formation of unreduced gametes. This may be related to asynchronous movement during meiosis between paired and unpaired chromosomes or to uneven distribution of chromosomes in anaphases, resulting in nonviable gametes.; It is believed that unreduced gametes with somatic chromosome numbers play a predominant role in natural polyploidization. Allohexaploid bread wheat originated from spontaneous hybridization of Triticum turgidum L. with Aegilops tauschii Coss. Unreduced gametes originating via meiotic restitution, including first-division restitution (FDR) and single-division meiosis (SDM), are well documented in triploid F(1) hybrids of T. turgidum with diploid Ae. tauschii (genomic constitution ABD, usually with 21 univalents in meiotic metaphase I). In this study, two T. turgidum lines known to carry genes for meiotic restitution were crossed to tetraploid Ae. tauschii.
关键词	Aegilops Tauschii Chromosome Pairing Triticum Turgidum Unreduced Gametes
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	DURUM-WHEAT ; SEXUAL POLYPLOIDIZATION ; MEIOTIC RESTITUTION ; SUBSTITUTION LINES ; FLOWERING PLANTS ; MECHANISMS ; SQUARROSA ; RYE
收录类别	SCI
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Horticulture
WOS记录号	WOS:000281380400005
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1652
专题	中国科学院西北高原生物研究所
作者单位	1.Minist Agr, Key Lab SW Crop Germplasm Utilizat, Yaan 625014, Sichuan, Peoples R China 2.Sichuan Agr Univ, Triticeae Res Inst, Chengdu 611130, Sichuan, Peoples R China 3.Chinese Acad Sci, Key Lab Adaptat & Evolut Plateau Biota, NW Inst Plateau Biol, Xining 810001, Peoples R China
推荐引用方式 GB/T 7714	Wang, Chun-Jie,Zhang, Lian-Quan,Dai, Shou-Fen,et al. Formation of unreduced gametes is impeded by homologous chromosome pairing in tetraploid Triticum turgidum x Aegilops tauschii hybrids[J]. EUPHYTICA,2010,175(3):323-329.
APA	Wang, Chun-Jie,Zhang, Lian-Quan,Dai, Shou-Fen,Zheng, You-Liang,Zhang, Huai-Gang,&Liu, Deng-Cai.(2010).Formation of unreduced gametes is impeded by homologous chromosome pairing in tetraploid Triticum turgidum x Aegilops tauschii hybrids.EUPHYTICA,175(3),323-329.
MLA	Wang, Chun-Jie,et al."Formation of unreduced gametes is impeded by homologous chromosome pairing in tetraploid Triticum turgidum x Aegilops tauschii hybrids".EUPHYTICA 175.3(2010):323-329.