Introduction to the Characteristics and Traits of the Chuanza No. 8 Cotton Variety

(1) Variety source: This is a first-generation cotton hybrid developed by Lezhi County Seed Company in 1988 by crossing the 473A dual-purpose line with Chuanbei No. 2.

(2) Characteristics and traits: The growth period is 135 days, and it is a medium-early maturing upland cotton variety. During the seedling stage, growth and development are fast; the leaves are equal in size, and the leaf color is dark green; the plant type is compact, the fruiting branches are horizontal and evenly distributed, and air permeability is good; the plant height is 80-90 cm; during the flowering and boll-setting stage, growth is steady, flowering and boll setting are concentrated, the boll shell is thin and boll opening is smooth, there are many five-locule bolls, and the single boll weight is 5.08--5.15 g. The fiber color and luster are good, the lint percentage is 41.94%, the micronaire value is 4.14-4.77, the specific strength is 20.55-21.6, the seed index is 9.6-9.71 g, and the white flower rate is 85.95%. The harvested cotton amount by September 20 was 74.58%. According to inoculation identification, it is a variety tolerant to Fusarium wilt and Verticillium wilt.

(3) Yield performance: In the 1991-1992 two-year municipal regional trial, it ranked first, with an average lint yield of 80.81 kg per mu, an increase of 17.87% over the control 73-27 and an increase of 13.85% over Chuanza No. 4. In the 1993-1994 two-year provincial regional trial, it still ranked first among the tested varieties, with an average lint yield of 82.32 kg per mu, an increase of 0.40% over the control 73-27. In the 1995 provincial production trial, the lint yield was 109.45 kg per mu, an increase of 18.11% over the control 73-27.

(4) Suitable planting areas: Suitable for planting in lightly diseased and disease-free areas in our province.