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作物学报 ›› 2020, Vol. 46 ›› Issue (10): 1465-1473.doi: 10.3724/SP.J.1006.2020.01022

• 综述 •    下一篇

小麦族的基因组显性及其育种学意义

刘登才*(), 张连全, 郝明, 黄林, 甯顺腙, 袁中伟, 姜博, 颜泽洪, 伍碧华, 郑有良   

  1. 四川农业大学小麦研究所, 四川成都 611130
  • 收稿日期:2020-03-18 接受日期:2020-07-02 出版日期:2020-10-12 网络出版日期:2020-07-06
  • 通讯作者: 刘登才
  • 基金资助:
    国家自然科学基金项目(91935303);国家自然科学基金项目(31671689);国家自然科学基金项目(31671682);四川省育种公关和产业技术体系项目

Genome dominance and the breeding significance in Triticeae

LIU Deng-Cai*(), ZHANG Lian-Quan, HAO Ming, HUANG Lin, NING Shun-Zong, YUAN Zhong-Wei, JIANG Bo, YAN Ze-Hong, WU Bi-Hua, ZHENG You-Liang   

  1. Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
  • Received:2020-03-18 Accepted:2020-07-02 Published:2020-10-12 Published online:2020-07-06
  • Contact: Deng-Cai LIU
  • Supported by:
    National Natural Science Foundation of China(91935303);National Natural Science Foundation of China(31671689);National Natural Science Foundation of China(31671682);Sichuan Province Science & Technology Department Crops Breeding Project, and the Sichuan Province Agriculture and Affairs Department Innovative Research Team

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摘要：

小麦族包含大量由不同基因组组成的异源多倍体物种。同一个异源多倍体物种的不同基因组可能对表型性状产生非对称性贡献, 例如小麦属多倍体物种的形态分类特性, 更像其A基因组供体物种, 这种现象称为A基因组显性。由于基因组显性, 小麦族形成了以A、D、U、St为轴心(显性)基因组的异源多倍体物种簇。异源多倍体物种的基因组显性可能与其进化适应优势的形成有关。在育种方面, 基因组显性影响多倍体新作物开发及小麦-外源染色体易位设计。

关键词: 基因组非对称, 异源多倍体, 轴心基因组

Abstract:

Triticeae tribe houses a number of allopolyploid species that harbor combinations of various genomes. The different genomes of an allopolyploid may have asymmetric contributions to morphological traits. For instance, the taxon traits of allopolyploids within genus Triticum is highly like those from the donor species of A-genome, termed this phenomenon as A-genome dominance. Because of genome dominance, the allopolyploids of Triticeae are grouped into different species clusters with A, D, U, or St as the pivotal (dominant) genome. Genome dominance may confer the advantages in evolution and adaptation. In breeding, it is an important factor to influence the development of novel allopolyploid crops and the design of wheat-alien chromosome translocations.

Key words: allopolyploid, genome asymmetry, pivotal genome

图1

四倍体小麦、节节麦和普通小麦 普通小麦的株型穗型与它的AB基因组供体物种四倍体小麦相像, 而与它的D基因组供体物种节节麦差异很大。"

图2

以A、D、U、St基因组形成的异源多倍体物种簇"

图3

人工合成新多倍体及其亲本物种的穗型 a: 新合成的六倍体(AABBUU、AABBMM、AABBCC)及其亲本四倍体小麦(AABB)、小伞山羊草(Ae. umbellulata, UU)、顶芒山羊草(Ae. comosa, MM)、尾状山羊草(Ae. caudata, CC)。b: 新合成的六倍体(AABBAuAu、AABBAmAm、AAGGDD)、八倍体(AABBDDAmAm、AABBDDDD)及其二倍体乌拉尔图小麦(AuAu)、栽培一粒小麦(AmAm)、节节麦(DD)、四倍体小麦(AABB)、提莫菲维小麦(AAGG)。"

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[1] 寇春兰，赵来宾，刘梦，郝明，甯顺腙，袁中伟，刘登才，张连全*. 小麦未减数配子基因的连锁标记及染色体区段检测[J]. 作物学报, 2016, 42(07): 984-989.
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