Purple-marked rice male sterile lines developed in Guangxi
The rice male sterile lines carrying the purple-leaf marker trait, Xianhong A and Zhihong A, developed by the research team led by Guangxi Outstanding Expert Researcher Liang Shirong and Guangxi Academy of Agricultural Sciences Vice President Researcher Deng Guofu, passed the field technical appraisal organized by the office of the Guangxi Regional Crop Variety Approval Committee and conducted by a relevant expert group on August 3, 2007.
After strict field investigation and indoor microscopic examination, and after hearing the research team's technical report and answers to questions, the expert group unanimously concluded that Xianhong A and Zhihong A have stable agronomic traits, stable male sterility, and good flowering habits; Xianhong A has a male sterile plant rate of 100%, a pollen sterility degree of 99.96%, and a bagged self-pollination sterility degree of 100%; Zhihong A has a male sterile plant rate, pollen sterility degree, and bagged self-pollination sterility degree all of 100%; both male sterile lines meet the standards for three-line male sterile lines and can be applied in production.
The most prominent feature of these two male sterile lines is that the plant stems, sheaths, and leaves are purplish red, while the grains and branches are normal green, and the F1 combinations made with them appear as normal green plants. Therefore, by using this characteristic, sterile plants and maintainer plants mixed in the hybrid F1 can be simply and effectively eliminated at the seedling stage, ensuring the purity of hybrids in production fields; at the same time, the seed purity of their hybrid F1 can also be rapidly and effectively identified, eliminating the complicated, time-consuming, and labor-intensive identification work of purity testing by planting in a different location.
The development of purple-marked rice male sterile lines is the first of its kind in Guangxi, is of great significance for ensuring the safety of seeds used in agricultural production, and has broad application prospects.