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作者	单位
尚亚伟，张莹浩，郭宏娜，艾明军，徐芳媛，王骏,黄天荣，文卿琳	（1.塔里木大学农学院,新疆阿拉尔 843300； 2.新疆农业科学院作物研究所,新疆乌鲁木齐 830091；3.南疆干旱区特色作物遗传改良与高效生产兵团重点实验室,新疆阿拉尔 843300）

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中文摘要:

新疆的南疆地区降水稀少、气候干旱，耕地不同程度盐渍化，严重影响小麦生长并导致小麦产量下降，因此挖掘耐盐种质资源是提升南疆粮食产能的有效途径。本研究以宁夏引黄灌区及周边区域审定的42份春小麦品种为材料，在150 mmol·L^-1NaCl胁迫下测定萌发期、苗期的发芽指标及表型指标，综合评价42份春小麦品种的耐盐性。结果表明，大多数小麦品种在萌发期与苗期各指标相对值小于100%，萌发期发芽势、发芽指数、活力指数的变异系数大于20%；苗期苗高、地上部分鲜重和干重及根长的变异系数大于20%，不同性状间呈极显著或显著正相关。通过系统聚类分析将42份春小麦材料划分为3类，其中耐盐型材料15份，中间型材料20份，敏感型材料7份；宁春3号、宁春8号、宁春9号、宁春12号、宁春35号等耐盐性较好，表现出较强逆境适应性，初步验证了跨区域引进宁夏春小麦种质资源的可行性，为南疆耐盐品种选育提供基础材料与参考。

英文摘要:

Xinjiang, especially in the southern Xinjiang region, precipitation is scarce and the climate is arid. Land in this area suffers from varying degrees of salinization, which affects wheat growth and leads to reduced yields. Screening salt tolerant germplasm resources is an effective approach to improving grain production capacity in southern Xinjiang. In this study, 42 spring wheat varieties approved and released in the Yellow River Irrigation District of Ningxia and its surrounding areas were used as experimental materials. Under 150 mmol·L^-1 NaCl stress, germination and phenotypic indices were measured at the germination and seedling stages, and relative values of the 13 indices were calculated to comprehensively evaluate the salt tolerance of different varieties. The results showed that the relative values of most indices at the germination and seedling stages were below 100%. The coefficients of variation for germination energy, germination index, and vigor index at the germination stage exceeded 20%. At the seedling stage, the coefficients of variation for seedling height, above ground fresh weight, above ground dry weight, root dry weight, and root length were greater than 20%. Significant positive correlations were observed among the indices. The tested materials were classified into three categories via hierarchical cluster analysis: 15 salt tolerant genotypes, 20 intermediate genotypes, and 7 sensitive genotypes. Ningchun 3, Ningchun 8, Ningchun 9, Ningchun 12, and Ningchun 35 exhibited superior salt tolerance and strong stress adaptability, which preliminarily verifies the feasibility of cross regional introduction of Ningchun spring wheat germplasm resources, and providing material basis and methodological reference for breeding new salt tolerant wheat varieties in southern Xinjiang.

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