Analysis on Genetic Diversity of 27 Medium and Long Staple Land Cotton Germplasm Resources

To study the relationship between agronomic traits and yield fiber quality of medium and long staple land cotton in south Xinjiang, genetic diversity analysis, principal component analysis and cluster analysis were conducted for 13 traits of 27 medium and long staple land cotton resources. The results showed that the coefficients of variation of 27 resources ranged from 3.77% to 21.98%, and the genetic diversity indices ranged from 1.69 to 2.04, with the lowest coat score and the highest yield; The results of principal component extraction showed that the cumulative contribution of the first four principal components reached 73.394%, and the contributions in descending order from big to small: agronomic trait factor, quality factor, yield factor. coat score factor In the cluster analysis, five clusters exhibited various factors of medium-length staple land cotton germplasm resources, and 15 high-yielding and high-quality resource materials that could be used as parents for medium-length staple land cotton breeding were screened.