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不同陆地棉基因型抗旱性评价与抗旱丰产种质筛选
石有太1, 李忠旺1, 陈玉梁1, 冯克云2, 王红梅1, 刘新星1
0
(1甘肃省农业科学院生物技术研究所,兰州 730070;2 甘肃省农业科学院作物研究所,兰州 730070)
摘要:
为了鉴定陆地棉的抗旱性与丰产性,在年降雨量不足 40 mm 的敦煌市,设干旱胁迫和正常灌溉两个处理,通过测 定 102 份棉花品种的 15 个形态与产量指标,应用相关分析的方法确定抗旱指标,采用直接抗旱鉴定评价法与综合抗旱鉴定法 对其进行抗旱性评价,结果显示,棉花抗旱性综合评价应选择年际间变异较小的单铃重、株高、主茎节间长度、果枝数、单 株铃数、单株产量和茎干重 7 个指标,基于这 7 个单项指标计算的综合抗旱性评价指标之间相关性较高,都能评价棉花品种 的抗旱性,抗旱丰产棉花种质的筛选需要综合考虑多种因素的影响,在综合评价品种抗旱性的基础上,结合单株产量计算的 改进抗旱指数和抗旱系数,可筛选出抗旱丰产品种‘金垦 1 号’和‘金垦 108’,不抗旱丰产品种‘中 21371’和‘巴西 012’、 ‘石远 321’、‘冀丰 1056’和‘新陆早 33 号’,两年鉴定结果一致,品种抗旱丰产性表现稳定,适合西北内陆棉区种植,可 作为抗旱鉴定标准品种。
关键词:  棉花  抗旱性  农艺性状  产量
DOI:10.13430/j.cnki.jpgr.20190709001
投稿时间:2019-07-09修订日期:2019-11-04
基金项目:国家自然科学基金(31460365)
Evaluation of Drought-Tolerance of Upland Cotton Genotypes and Screening for Drought-Tolerance Yielding Germplasm
SHI You-tai1, LI Zhong-wang1, CHEN Yu-liang1, FENG Ke-yun2, WANG Hong-mei1, LIU Xin-xing1
(1Biotechnology Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070;2Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou 730070)
Abstract:
In order to identify the drought tolerance and high yield germplasm of upland cotton, data of fifteen morphological and yield traits of 102 varieties with two treatments (drought stress and normal irrigation) were determined with direct evaluation and comprehensive identification methods in Dunhuang City, Gansu Province, where the annual rainfall is below 40 mm. Correlational analysis showed that seven indices that are less fluctuating between years should be selected in the comprehensive evaluation of drought tolerance of cotton, which include single boll weight, plant height, length between fruit branches and main stem, fruit branch number, effective boll number, yield per plant and stem dry weight. Comprehensive drought tolerance evaluation based on these indices are highly correlated and can be used to evaluate the drought tolerance of cotton varieties. When screening drought-tolerance and high-yielding performance of cotton germplasm, the influence of many factors should be considered comprehensively. On the basis of comprehensive evaluation of drought tolerance of the varieties, combined with the improved drought tolerance indices and drought tolerance coefficient calculated by the yield per plant of seed cotton, and by way of comprehensive analysis, drought-tolerant and high-yielding cotton varieties ‘Jinken 1 Hao’ and ‘Jinken 108’ were screened out, and cotton varieties ‘Zhong 21371’, ‘Brazil 012’, ‘Shiyuan 321’, ‘Jifeng 1056’ and ‘Xinluzao 33 Hao’ were identified as not being drought-tolerant high-yielding. The drought-tolerant high-yielding cotton varieties were stable in performance through the two-year test, are suitable for cultivation in the northwest inland cotton region, and can be used as standard varieties for drought tolerance identification.
Key words:  cotton  drought tolerance  agronomic traits  yield

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