论文部分内容阅读
以国内外 4个来源不同的海岛棉品种与我国育成的 8个陆地棉品种组配的 32个不同类型的杂交组合为材料 ,在人工生长室条件下 ,用 4个不同致病力类型黄萎病菌系于棉花苗期接种 ,进行了海岛棉黄萎病抗性的鉴定和遗传研究。结果表明 ,海岛棉品种 Pima90 - 53(美洲型 )、Giza70 (埃及型 )、 50 10 F和吐海 2号 (中亚埃及型 )具有对强致病力类型和中等致病力类型黄萎病菌系的抗性 ,这些黄萎病抗源在与我国陆地棉品种杂交的遗传背景下 ,其抗性为由显性单基因决定的质量遗传性状。用中棉所 8号与吐海 2号 1个组合初步证明正、反交结果相同 ,吐海 2号的抗性不存在母本效应。等位性测验表明 ,上述来源不同的黄萎病抗源的抗病基因是等位的
In this study, 32 different types of cross combinations of 4 island cotton cultivars with different origins at home and abroad and 8 cultivars of G. hirsutum cultivated in China were used as materials. Four different virulent types of Verticillium wilt The pathogen was inoculated at cotton seedling stage, and the resistance of Verticillium dahliae was identified and the genetic study was carried out. The results showed that the Pima90-53 (Americas), Giza70 (Egypt), 5010F and Tuhai2 (Central Asian Egypt) cultivars of Pima90-53 were resistant to both virulent and moderate pathogenic Verticillium dahliae The resistance of these Verticillium wilt resistance genes in the genetic background of crossbreeding with Upland cotton varieties in China is characterized by the heritability inherited from dominant single gene. The combination of Zhongmiansuo No. 8 with Tuhai No. 2 initially proved positive and the result of the anti-cross was the same. There was no maternal effect on the resistance of Tuhai No.2. Allelism tests showed that the above resistance genes with different sources of resistance to Verticillium wilt were allelic