Synthetic hexaploid wheat and its utilization for wheat genetic improvement in China

文献类型： 外文期刊

第一作者： Li, Jun

作者： Li, Jun;Wei, Huiting;Hu, Xiaorong;Zou, Yuchun;Liu, Dengcai;Zhang, Lianquan;Zheng, Youliang;He, Zhouhu;He, Zhouhu;Liu, Dengcai

作者机构：

关键词： Aegilops tauschii;synthetic hexaploid wheat;disease resistance;genetic diversity;wheat breeding;unreduced gametes

期刊名称：JOURNAL OF GENETICS AND GENOMICS （ 影响因子：4.275； 五年影响因子：5.223 ）

ISSN： 1673-8527

年卷期： 2009 年 36 卷 9 期

页码：

收录情况： SCI

摘要： Synthetic hexaploid wheat (Triticum turgidum x Aegilops tauschii) was created to explore for novel genes from T turgidum and Ae. tauschii that can be used for common wheat improvement. In the present paper, research advances on the utilization of synthetic hexaploid wheat for wheat genetic improvement in China are reviewed. Over 200 synthetic hexaploid wheat (SHW) accessions from the International Maize and Wheat Improvement Centre (CIMMYT) were introduced into China since 1995. Four cultivars derived from these, Chuanmai 38, Chuanmai 42, Chuanmai 43 and Chuanmai 47, have been released in China. Of these, Chuanmai 42, with large kernels and resistance to stripe rust, had the highest average yield (> 6 t/ha) among all cultivars over two years in Sichuan provincial yield trials, outyielding the commercial check cultivar Chuanmai 107 by 22.7%. Meanwhile, by either artificial chromosome doubling via colchicine treatment or spontaneous chromosome doubling via a union of unreduced gametes (2n) from T turgidum-Ae. tauschii hybrids, new SHW lines were produced in China. Mitotic-like meiosis might be the cytological mechanism of spontaneous chromosome doubling. SHW lines with genes for spontaneous chromosome doubling may be useful for producing new SHW-alien amphidiploids and double haploid in wheat genetic improvement.

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