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Detailed introduction to the cotton variety Chuanyou No. 1

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(1) Combination source: This combination is a new type of cotton hybrid developed by the Cotton Research Institute of the Sichuan Academy of Agricultural Sciences using the cotton genic male sterile "two-line method" complete male sterile line MA as the female parent, crossed with Chuan 55 as the male parent. (2) Characteristics: The growth period is 128-131 days, belonging to the early-medium maturity type; growth and development are rapid during the seedling and bud stages, with vigorous growth in the early and middle stages; plant height is medium, forming a tower shape, with fruit branches borne at relatively low nodes and good ventilation and light penetration, and leaves are medium-sized and dark green. Bolls are large, oval and slightly pointed, with a single boll weight of 5.16 grams; lint

(1) Combination source: This combination is a new type of cotton hybrid developed by the Cotton Research Institute of the Sichuan Academy of Agricultural Sciences using the cotton genic male sterile "two-line method" complete male sterile line MA as the female parent, crossed with Chuan 55 as the male parent.

(2) Characteristics: The growth period is 128-131 days, belonging to the early-medium maturity type; growth and development are rapid during the seedling and bud stages, with vigorous growth in the early and middle stages; plant height is medium, forming a tower shape, with fruit branches borne at relatively low nodes and good ventilation and light penetration, and leaves are medium-sized and dark green. Bolls are large, oval and slightly pointed, with a single boll weight of 5.16 grams; lint percentage 42.83%. Lint index 7.51 grams, seed index 9.66 grams, fiber white, boll opening relatively smooth; resistant to fusarium wilt, tolerant to verticillium wilt, with excellent quality.

(3) Yield, quality and resistance performance: According to provincial regional trial identification in 1995-1996, the average lint yield per mu was 107.24 kg, an increase of 11.92% over the control Chuanmian 56; in the 1997 production trial identification, the average lint yield per mu was 100.15 kg, an increase of 16.08% over the control Chuanmian 56. Fiber quality: micronaire value 4.65, 2.5% span length 29.76 mm, specific strength 21.29 grams/tex. Disease resistance: fusarium wilt index 11.2%, verticillium wilt index 33.5%, belonging to the type resistant to fusarium wilt and tolerant to verticillium wilt.

(4) Key cultivation techniques: Early April is suitable for sowing. Density per mu 2800-33000 plants (medium fertility), apply sufficient organic base fertilizer, heavily apply flowering and boll fertilizer, and control pests in time; use chemical regulation during the bud and flowering stages.

(5) Suitable planting areas: Suitable for planting in Sichuan and the cotton region of the middle reaches of the Yangtze River.

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