3197A是西非高粱(迈罗)做母本,南非高粱(卡佛尔)做父本进行杂交,而后再用南非高粱连续回交选育而成的高粱雄性不育系.我国所应用的3197A是1956年从美国引入的.1965年引入我县,至今已有十四年的时间了.由于长期重使用轻提纯,致使3197A发生了严重混杂退化,造成杂交种子质量低劣,影响杂种增产潜力的发挥.近三年来,我们搞 3197A is a sorghum male sterile line derived from West African sorghum (Mylo) as a female parent and South African sorghum (Cough) as a male parent and then backcrossed by South African sorghum continuously. It was introduced from the United States in 1956. It has been 14 years since it was introduced to our county in 1965. Due to the heavy use of light purification for a long period of time, 3197A was seriously mixed and degraded, resulting in poor quality of hybrid seeds and affecting the potential for increased yield of hybrids In the past three years, we have done