Genetic Analysis of Cotton Seed Size and Main Component Content in Upland and Marine Introgression Line Population of Cotton
LIU Xiaofang
LUAN Yujuan
QIAO Dan
BAI Bingnan
LU Quanwei
GUO Jinying
Abstract：In this study,the size of cottonseed and the content of oil,protein,and other major components of cottonseed were measured in five cultivation environments of the BC5F3:5 population of the land-sea intercalation line of high oil island cotton"Hai 1"and high yield upland cotton CRI36.The results showed that the main nutrients and size-related traits of cottonseed in BC5F3:5 population were normally distributed,and the average values of cottonseed oil and protein contents were close to that of the recurrent parent CRI36,with abundant genetic variations in the population.Cottonseed length,width,aspect ratio,area,and circumference exhibited significant genetic variation(coefficient of variation ranging from 2.81％～7.00％),while the trends in the five environmental distribution trends were similar and normally distributed,indicating that cottonseed traits were controlled by multiple genes.Except length-to-width ratio,cottonseed oil content showed a negative correlated with protein content and a positive correlation with cottonseed size under different environments.Protein content was negatively correlated with cottonseed size.Both the environment and genotype had significant effects on grain length,grain width,protein content,oil content,and linolenic acid,while the environment also impacted palmitic acid and linoleic acid.The interaction between environment and genotype did not significantly affect the contents of palmitic acid and linoleic acid.In this study,ten cotton seed materials with excellent oil content,protein content,and size in five environments were selected.The results laid a foundation for achieving synchronous genetic improvement of cottonseed traits and provided essential materials for breeding cottonseed with optimal oil content,protein quality and size traits.
Keywords：cottonseed sizeland-sea introgression systemoil contentcorrelation analysis
Publication Date：2024-03-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 105-114 )