陆地棉品种资源耐复合盐碱性综合评价分析

以119份国内外陆地棉品种资源为试验材料,测定了复合盐碱胁迫下陆地棉的叶绿素(Chl)、株高(PH)、果枝(FB)、果节(FN)、始节高(HFN)、叶面积(LA)、单株结铃数(BN)、铃重(BW)、衣分(LP)共9个农艺性状指标,并采用模糊数学的隶属函数法对陆地棉的耐盐性进行综合评价。结果表明:复合盐碱胁迫下,不同地域陆地棉的Chl、PH、FB、FN、HFN、LA、BN、BW、LP的耐盐系数存在差异,其中LP、BW、Chl差异较小,变异系数为0.078～0.171;而FN、BN、LA差异较大,变异系数为0.34～0.48。综合评价结果显示,119份陆地棉品种资源中,耐盐性为敏感(42.8%)和中耐盐(37.0%)的材料占多数,并筛选得到豫棉15、KK-1047、新陆中69等20份高耐盐及耐盐材料,可以为陆地棉耐盐遗传改良的亲本材料。

Comprehensive Assessment of Complex Salt-alkali Tolerance of the Upland Cotton Varities Resources

This paper determined the 9 agronomic traits of upland cotton under complex salt-alkali stress including chlorophyll content (Chl), plant height (PH), fruit branch (FB), fruit node (FN), height of the first node (HFN), leaf area (LA), boll number (BN), boll weight (BW), lint percent (LP) by using 119 domestic and abroad upland cotton varieties resources. Then the salt tolerance of upland cotton was evaluated by membership function method of fuzzy mathematics. The results showed that: there were differences in the salt tolerance coefficients of Chl, PH, FB, FN, HFN, LA, BN, BW and LP of upland cotton in different regions under complex salt-alkali stress, in which the differences of LP, BW and Chl were small with the variation coefficient of 0.078~0.171. However, FN, BN and LA were significantly different with a variation coefficient of 0.34~0.48. The comprehensive evaluation results showed that among 119 upland cotton variety resources, most of the materials were salt tolerance sensitivity (42.8%) and medium salt tolerance (37.0%), and 20 materials with high salt tolerance and salt tolerance, such as YM 15, KK-1047 and XLZH 69 etc., were selected which could be used as the parental lines of upland cotton for improvement of salt tolerance.