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- Title
棉花品种抗旱性相关指标分析与综合评价.
- Authors
郑巨云; 桑志伟; 王俊铎; 龚照龙; 梁亚军; 张泽良; 郭江平; 莫明; 李雪源
- Abstract
To screen the index closely related to drought resistance of upland cotton and varieties with high drought resistance, 203 upland cotton varieties resources from home and abroad were as materials. The agronomic traits and indexes of physiological and biochemical were determined in drought stress and normal irrigation treatments. The drought resistances of 203 varieties were comprehensively evaluated by grey correlation degree, comprehensive measurement of drought resistance, comprehensive drought resistance coefficient and weighted comprehensive drought resistance coefficient. The results showed that the close relationships between index and comprehensive measure of drought resistance(D value)were as followed, chlorophyll content > boll weight > lint percent > plant height > fruit branch > the frist node fruit branch > leaf area > height of the frist node fruit branch > proline content > fruit node > bolls number > yield per plant > molondialdehyde content > superoxide dismutase activity. It showed that chlorophyll content, boll weight, lint percentage, plant height, number of fruit branch, the first node of fruit branch, leaf area and the height of the first node of fruit branch were closed relationships with D value and could be as important indexes identified drought-resistant. The cluster analysis showed that 203 upland cotton varieties were divided into 5 types. Type Ⅰincluded 12 cotton varieties(such as Ekangmian 10, Ganmian 10, Turkmen land cotton, etc.)and showed high drought resistance, accounting 5.9%. Type Ⅱ included 62 cotton varieties(such as KK-1543, Yumian 15, Wanmian 8407, etc.)and showed middle drought resistance, accounting 30.5%. Type Ⅲ included 80 cotton varieties(such as Jinmian 6, Xinluzhong 48, Lumian 28, etc.)and showed drought tolerance, accounting 39.4%. Type Ⅳ included 35 cotton varieties(such as Yumian 17, 17N8, Nongken 5, etc.)and showed drought sensitive, accounting 17.3%. Type Ⅴ included 14 cotton varieties(such as Xinluzao 24, Xinluzao 29, Jimian 12, et al.)and showed high sensitive to drought, accounting 6.9%. The indexes and varieties of high drought resistance were screened, which provided theoretical and material support for drought resistant breeding of cotton.
- Subjects
SUPEROXIDE dismutase; DROUGHT tolerance; LEAF area; CLUSTER analysis (Statistics); DROUGHTS; COTTON
- Publication
Journal of Agricultural Science & Technology (1008-0864), 2022, Vol 24, Issue 10, p23
- ISSN
1008-0864
- Publication type
Article
- DOI
10.13304/j.nykjdb.2021.0474