您好，欢迎访问云南省农业科学院 机构知识库！

Stigma and Glume Characteristics Synergistically Determine the Stigma Exsertion Rate in Thermo-Photo-Sensitive Genic Male Sterile Wheat

文献类型： 外文期刊

作者： Li, Hongsheng 1 ; Yang, Zhonghui 2 ; Li, Shaoxiang 2 ; Elfanah, Ahmed M. S. 2 ; Abdelkhalik, Sedhom 2 ; Tang, Xiong 2 ; Yin, Jian 2 ; Ding, Mingliang 2 ; Liu, Kun 2 ; Yang, Mujun 2 ; Wang, Xiue 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Agr, Collaborat Innovat Ctr Modern Crop Prod CIC MCP, State Key Lab Crop Genet & Germplasm Enhancement &, Nanjing 210095, Peoples R China

2.Yunnan Acad Agr Sci, Food Crops Res Inst, Kunming 650205, Peoples R China

3.Agr Res Ctr, Field Crops Res Inst, Wheat Res Dept, Giza 12619, Egypt

关键词： hybrid wheat; floral architecture; stigma exsertion rate; out-crossing seed setting rate; thermo-photo-sensitive genic male sterile

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 16 期

页码：

收录情况： SCI

摘要： Wheat hybrids have been widely demonstrated to have remarkable heterosis or hybrid vigor in increasing yield potential and stability since the 1960s. Two-line hybrid wheat can achieve higher yields than local varieties, especially in marginal environments. However, the commercial application of hybrid wheat is hindered by higher seed costs, primarily due to lower yields in hybrid seed production. Stigma exsertion has been verified as a decisive factor in increasing rice's hybrid seed yield, but more investigation is needed in hybrid wheat breeding and production. In this study, four thermo-photo-sensitive genic male sterile lines, including K41S, K64S, K66S, and K68S, with different stigma exsertion rates (SERs) were used to compare the differences in floral architecture relative to stigma exsertion over two growing seasons. The results revealed that the K41S and K64S exhibited a relatively higher SER at 21.87% and 22.81%, respectively. No exserted stigma was observed in K66S, and K68S had an SER of only 0.82%. This study found that the stigma length, glume width and the length-width ratio of the glume were significantly correlated with the SER, with correlation coefficients of 0.46, -0.46 and 0.60, respectively. Other stigma features such as the branch angle, stretch width and hairbrush length, as well as the glume length, also had a weakly positive correlation with SER (r = 0.09-0.27). For K41S and K64S, the SER was significantly affected by the differences in the stigma branch angle and stigma stretch width among florets. A cross-pollination survey showed that the out-crossing ability of florets with an exserted stigma was about three times as high as that of florets with a non-exserted stigma. As a result, the stigma-exserted florets that accounted for 21.87% and 22.81% of the total florets in K41S and K64S produced 46.80% and 48.53% of the total cross-pollinated seeds in both sterile lines. These findings suggest that a longer stigma combined with a slender glume appears to be the essential floral feature of stigma exsertion in sterile wheat lines. It is expected that breeding and utilizing sterile lines with a higher SER would be a promising solution to cost-effective hybrid wheat seed production.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：云南省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台