基于生育期和农艺性状的棉花品种(系)适应性评价

【目的】 筛选生育期适中、适应性好、高产优质的棉花品种(系),为新疆棉花生产提供品种支撑。【方法】 采用相关性分析、主成分分析法,对参试20份棉花材料的19个性状连续2年进行综合评价。【结果】 受气象因子影响,不同年份间参试品种(系)生育期变化差异较大;从20个材料的19个性状的主成分分析中提取到6个主成分,其累计贡献率在两年间分别达到了78.154%、82.839%。2017年综合因子得分最高的是J170634(0.517),2018年综合因子得分最高的是J170647(0.609)。【结论】 20份材料中,J170640、J170647、J170650三份综合性状2年表现均较好,具有较强的生态适应性。J170644、J170645、J170646等2年适应性表现差异较大,稳定性较差; J170633、J170632在该地区的生态适应性较差。稳定性是棉花适应性评价的重要指标之一。

Adaptability Evaluation of Cotton Varieties (Lines) Based on Growth Period and Agronomic Traits

【Objective】 To screen cotton varieties (lines) with moderate growth period, good adaptability, high yield and high quality, and provide variety support for promoting cotton production in Xinjiang.【Methods】 Correlation analysis and principal component analysis were used to conduct comprehensive evaluation of 19 characters of 20 cotton materials tested for 2 consecutive years.【Results】 The relationship between fertility and CK changed greatly in the two-year experiment; there were a large number of significant and extremely significant correlations in the correlation analysis between 19 indicators of 20 test materials. In the principal component analysis, six principal components were extracted from the two-year test results. The highest comprehensive factor score in 2017 was J170634 (0.517), and the highest comprehensive factor score in 2018 was J170647 (0.609).【Conclusion】 Among the 20 materials, J170640, J170647, and J170650 all performed well for two years, and had strong ecological adaptability. J170644, J170645, J170646 and others showed a large difference in adaptive performance and poor stability in the two years; J170633, J170632 demonstrated a poor ecological adaptability in this region. Stability should be one of the important indicators of cotton adaptability evaluation.