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冬麦春播小麦穗分化阶段对低温胁迫的响应及耐寒性

徐澜1,2,高志强1**,安伟3,原亚琦2,李彦良3   

  1. (1山西农业大学农学院, 山西太谷 030801;  2忻州师范学院生物系, 山西忻州 034000;  3山西省农业科学院玉米研究所, 山西忻州 034000)
  • 出版日期:2015-06-18 发布日期:2015-06-18

Low-temperature response and cold tolerance at spike differentiation stage of winter wheat varieties sowed in spring.

XU Lan1,2, GAO Zhi-qiang1, AN Wei3, YUAN Ya-qi2, LI Yan-liang3   

  1. (1College of Agronomy, Shanxi Agricultural University, Taigu 030801, Shanxi, China; 2Department of Biology, Xinzhou Teachers University, Xinzhou 034000, Shanxi, China; 3Institute of Maize Research, Shanxi Academy of Agricultural Sciences, Xinzhou 034000, Shanxi, China)
  • Online:2015-06-18 Published:2015-06-18

摘要:

以长江中下游地区引进的10个冬小麦品种为材料,在忻定盆地春播条件下,于2013—2014年研究了低温胁迫对冬小麦穗分化阶段光合作用、渗透调节物质及膜系统产生的影响,并对其抗寒性能进行综合评价.结果表明: 在低温胁迫下,不同品种小麦叶片的离子渗漏率、可溶性糖和可溶性蛋白质含量均不同程度地升高,总叶绿素含量明显下降.通过主成分分析和抗寒性度量值(D值)排序,不同品种冬小麦幼穗分化期间的抗寒性为:渝麦10、扬麦20、云麦42的抗寒性较差;扬麦13、渝麦12、宁麦13的抗寒性较强且年际稳定性好,D值分别为0.665~0.659、0.493~0.495、0.471~0.583;而作为对照的宁2038、新春30分别为0.368~0.397、0.328~0.330.扬麦13、渝麦12、宁麦13的两年籽粒产量显著高于其他品种,可作为忻定盆地的引种材料.
 

Abstract: A total of 10 winter wheat varieties were imported from the middle and lower reaches of the Yangtze River region in China. Those varieties were sowed in spring in Xinding basin area of Shanxi Province, and the field trials were performed for two years (2013-2014). The traits and physiological characteristics under low temperature stress including grain yield, total content of chlorophyll, osmotic adjustment, membrane system, ion leakage rate, contents of soluble sugar and soluble protein were investigated, and the cold tolerance levels of the wheat varieties were assessed. The results showed that low temperature stress led to increases in wheat leaf ion leakage rate, soluble sugar and protein contents, but obvious reduction of chlorophyll content. According to principal component analysis and cold tolerance (D value), Yumai 10, Yangmai 20, and Yunmai 42 were classed as cold sensitive wheat varieties. Yangmai 13, Yumai 12, and Ningmai 13 were classed as stronger coldresistant wheat genotypes, and showed stability through twoyear field trials, with the D values being 0.665-0.659, 0.493-0.495, and 0.471-0.583, respectively, while the D values for the controls Ning 2038 and Xinchun 30 were 0.368-0.397, and 0.328-0.330, respectively. The grain yields of the cold resistant wheat varieties were significantly higher than that of the other varieties tested. Therefore, Yangmai 13, Yumai 12 and Ningmai 13 could be imported and used as the cold tolerant wheat varieties for North Plain of China.