Effect of a novel dwarfing mutant site on chromosome 4B on agronomic traits in common wheat

• Published in: Frontiers in plant science Vol. 15; p. 1338425
• Main Authors: Hao, Jiamin, Zhao, Zhangchen, Fu, Xiaoge, Zhao, Yujiao, Ateeq, Muhammad, Mou, Liming, Han, Yong, Liu, Yangbin, Yin, Yongan, Zotova, Lyudmila, Serikbay, Dauren, Fan, Chunyan, Hu, Yin-Gang, Chen, Liang
• Format: Journal Article
• Language: English
• Published: Switzerland Frontiers Media S.A 20-03-2024
• Subjects: agronomic traits; dwarf gene; lodging resistance; plant height; Plant Science; wheat; dwarf gene; wheat; plant height; agronomic traits; lodging resistance
• ISSN: 1664-462X; 1664-462X
• DOI: 10.3389/fpls.2024.1338425

The introduction of dwarfing genes triggered a wave of "green revolution". A number of wheats dwarfing genes have been reported in previous studies, and only a small fraction of these have been applied to production practices. Therefore, the development of novel dwarfing genes for wheat is of great value. In this study, a novel dwarfing site,
, identified in the Yanzhan mutation, is located on chromosome 4B (30-33MB) and its mechanism of action is different from that of
(C-T mutation), but whether it affects the
(
) or other genes is unclear. Exogenously applied GA
experiments showed that
is one of the gibberellin-insensitive dwarf genes. The effects of the dwarf gene
on agronomic traits in wheat were evaluated in the field using Yanzhan, Yanzhan mutations, F
and F
lines. The results showed that
improved lodging resistance by reducing plant height, increasing diameter, wall thickness and mechanical strength of the basal stem. In terms of yield traits,
had negative effects on tiller number plant
, biomass plant
and yield plant
, but had no significant effect on harvest index, 1000-kernel weight and spike traits. In addition,
significantly increased crude protein, wet gluten and starch content. Therefore, the rational use of the new dwarfing site
has potential and value in dwarf wheat breeding.