4.7 Article

Agronomic Trait Analysis and Genetic Mapping of a New Wheat Semidwarf Gene Rht-SN33d

期刊

出版社

MDPI
DOI: 10.3390/ijms24010583

关键词

common wheat; dwarf mutant; gene mapping; QTL; Rht-SN33d

向作者/读者索取更多资源

Plant height is a crucial agronomic trait in wheat breeding. The identification of a new recessive semi-dwarf gene Rht-SN33d in the semi-dwarf wheat mutant dwarf33 provides valuable insights into wheat height regulation. The mapping of Rht-SN33d to a specific chromosomal interval and the potential candidate gene TraesCS3D02G542800 contribute to expanding our understanding of the genetic basis of plant height in wheat.
Plant height is a key agronomic trait that is closely to the plant morphology and lodging resistance in wheat. However, at present, the few dwarf genes widely used in wheat breeding have narrowed wheat genetic diversity. In this study, we selected a semi-dwarf wheat mutant dwarf33 that exhibits decreased plant height with little serious negative impact on other agronomic traits. Genetic analysis and mutant gene mapping indicated that dwarf33 contains a new recessive semi-dwarf gene Rht-SN33d, which was mapped into similar to 1.3 Mb interval on the 3DL chromosome. The gibberellin metabolism-related gene TraesCS3D02G542800, which encodes gibberellin 2-beta-dioxygenase, is considered a potential candidate gene of Rht-SN33d. Rht-SN33d reduced plant height by approximately 22.4% in mutant dwarf33. Further study revealed that shorter stem cell length may be the main factor causing plant height decrease. In addition, the coleoptile length of dwarf33 was just 9.3% shorter than that of wild-type Shaannong33. These results will help to expand our understanding of new mechanisms of wheat height regulation, and obtain new germplasm for wheat improvement.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据