关键词: 转BT基因抗虫棉; 农艺性状; 适应性; 陆地棉

Abstract:

【Objective】Evaluate the adaptability and application value of germplasm resources, and to provide parents for the selection and breeding of new cotton varieties. 【Methods】The variation and correlation of agronomic traits and quality traits were studied by using 90 BT transgenic insect-resistant cotton as experimental materials, and principal component analysis and clustering analysis of 90 BT transgenic insect-resistant cotton were carried out with main agronomic traits and quality traits.【Results】The results of the analysis showed that there were significant differences in fiber quality and agronomic traits in the test materials. Among them, 44 were converted to BT gene cotton as early maturing materials, and 46 were converted to BT gene cotton as medium and early maturing materials. The first five principal component characteristic values were greater than 1, and the cumulative contribution rate reached 71.62%, the first principal component was related to cotton yield, the second principal component was related to fiber quality, and the third principal component was related to plant traits. 90 trans-BT cotton were divided into 4 groups by cluster analysis, and the sub-finger traits of group I showed good performance. Group II, the specific strength and elongation at break were good. Group III had higher boll number, boll weight and clothing score per plant. Group IV's fiber quality was better. 【Conclusion】18 parts of G21-2, G21-14, G21-1, G21-77 and other boll weights are selected from 90 transgenic cotton materials, all with a weight of more than 5.00 g, clothing content of more than 42%, and excellent comprehensive properties.

Key words: BT transgenic insect-resistant cotton; agronomic trait; adaptability; upland cotton