Breeding of a New Cotton Variety'Xumian 608'Suitable for Machine Picking with Early Maturity and High Quality
Aiming at the problems such as grain and cotton competition for land,excessive labor and increasing labor costs in cotton production,a new early-maturing cotton variety'Xumian 608'was bred by cross-breeding technology with'Lumian 19'as female parent and'Xu Mian 266'as male parent.'Xumian 608'can meet the one year two-harvest planting system of wheat(garlic,oil)and cotton,and is suitable for mechanized harvesting.In the regional trial of new cotton varieties in Jiangsu Province from 2018 to 2019,the growth period of'Xumian 608'was 99 days,the lint percentage was 40.1%,and the lint yield of ginned cotton was 1221.0 kg/hm2,which was 3.9% higher than that of the control'Zhong mian Suo 50'.The plant height was 87.5 cm and the first fruit branch height was 20.8 cm,which met the standard of machine-picked cotton plant type.The average length of the upper half part of the fiber was 28.1 mm,the specific breaking strength was 29.2 cN/tex,and the micronaire value was 5.1.In the production test of Jiangsu Province in 2020,the average lint yield was 1340.3 kg/hm2,which was 10.5% higher than that of the control'Zhong mian Suo 50'.This variety was suitable for promoting and planting in the early-maturing cotton areas in Jiangsu Province,Yangtze River basin and Yellow River basin.It showed tolerance to wilt,verticillium and salt,resistant to bollworm and sensitivity to defoliating agents.
early maturing cotton'Xumian 608'variety breedingyieldquality
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