Genetic Mapping of Gibberellic Acid-sensitive Genes for Semi-dwarfism in Durum Wheat
Genetic Mapping of Gibberellic Acid-sensitive Genes for Semi-dwarfism in Durum Wheat
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DOI：
10.1556/crc.39.2011.2.1
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发表时间：
2011-06-01
影响因子：
1.6
通讯作者：
Kuboyama, T.
中科院分区：
文献类型：
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作者：
Haque, M. A.;Martinek, P.;Kuboyama, T.
小麦半矮秆品种与赤霉酸（GA（3））不敏感的高度降低基因相关，导致产量显着增加，但往往低于这一潜力，因为深显后出苗不良。替代性半矮秆基因可能具有降低植物高度而不损害早期植物生长的潜力。在硬粒小麦中，利用群体分离分析筛选与赤霉素敏感基因Rht 14连锁的微卫星标记。Castelporziano，Rht16 in cv. Edmore M1和Rht 18在cv.伊卡罗Rht 14、Rht 16和Rht 18的分子标记Xbarc 3 -6A在不同高度级的DNA块中表现出显著的多态性差异。Rht 14、Rht 16和Rht 18与6A染色体短臂上的Xbarc 3（11.7- 28.0cM）连锁，它们似乎是等位基因。染色体6AS上的半矮秆基因可能在育种上有潜在的应用价值。
Semi-dwarf varieties in wheat associated with gibberellic acid (GA(3))-insensitive height reducing genes have led to significant increases in yield but often fall below this potential because of poor seedling emergence after deep showing. Alternative semi-dwarf genes may have the potential to reduce plant height without compromising early plant growth. In durum wheat, bulk segregant analysis was used to screen microsatellite markers linked with the GA(3)-sensitive genes Rht14 in cv. Castelporziano, Rht16 in cv. Edmore M1 and Rht18 in cv. Icaro. Molecular marker Xbarc3-6A for Rht14, Rht16 and Rht18 showed significant polymorphic differences among DNA bulks for height classes. The genes Rht14, Rht16 and Rht18 were linked with Xbarc3 (11.7-28.0 cM) on the short arm of chromosome 6A and they appear to be allelic. Semi-dwarf genes on chromosome 6AS may potentially be used in breeding for improved establishment.