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选择了新疆特早熟棉区自解放以来不同时期１２个有代表性的推广品种（系）及审定品种，分成５个时期进行主要农艺性状及品质性状演变趋势的研究，结果表明，随着品种的更换棉花品种的增产潜力增大，新育成品种产量的遗传增益每年９．３ｋｇ·ｈｍ－２，产量的增加主要是衣分、衣指和结铃性的提高。纤维长度以每时间段０．２ｍｍ的速度递增，纤维强度、整齐度和伸长率并没有多大提高，而且近期育成品种还明显下降。
A total of 12 representative varieties (lines) and validated varieties were selected from Xinjiang precocious cotton area at different periods since liberation, and the evolution of main agronomic traits and quality traits was divided into five periods. The results showed that with the variety The potential for increasing the yield of cotton varieties was increased. The genetic gain of new breeding varieties was 9.3 kg · hm-2 per year. The increase in yield was mainly due to an increase in the percentage of clothes, fingers and knots. The fiber length increases at a rate of 0.2mm per time period, and the fiber strength, uniformity and elongation do not increase much, and the recently bred varieties also drop significantly.