Abstract:
【Objective】 To enrich Xinjiang cotton resource pool and provide
Verticillium wilt resistance resources from the introduced eighteen foreign cotton germplasm by identifying their
Verticillium wilt resistance and agronomic characters.
【Methods】 The cotton agronomic traits, the incidence of
Verticillium wilt, cotton yield, and the fiber quality were investigated and variance analysis of main agronomic traits, correlation analysis and cluster analysis of disease index were executed.
【Results】 Eighteen foreign germplasm belonged to medium and early maturity types with.There were one highly resistance, six resistance, eight tolerance and four susceptible germplasm to
Verticillium wilt, accounting for 5.55%, 27.77%, 44.44% and 22.22%, respectively.The disease index was negatively correlated with plant height, first node of fruit branch, boll bearing per plant, boll weight per plant, lint percentage, yield of seed cotton, average length of upper part, strength of breaking ratio, uniformity index and elongation, but positively correlated with effective fruit branch and Micronaire value.The cluster analysis of disease index showed that they were divided into three clusters.Among the above types, No.4 was a high resistance material.
【Conclusion】 The
Verticillium wilt resistance ability are screed and identified in the research.
Verticillium wilt resistant germplasm are lines 2, 4, 6, 9, 11 and 16, and sensitive lines are 10, 13, 17 and 18.Furthermore, five germplasm with higher yields (line 3, 4, 9, 11 and 15) and three germplasm (1, 9 and 11) with better quality are also identified.Ultimately, two
Verticillium wilt resistance germplasm (9 and 11) with high yield and good quality are screened out.