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Effects of Powdery Mildew on 1 000-Kernel Weight, crude protein content and Yield of Winter Wheat in Three Consecutive Growing Seasons

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Journal of Integrative Agriculture 2014年第7期13卷 1530-1537页

作者： CAO Xue-ren YAO Dong-ming DUAN Xia-yu LIU Wei FAN Jie-ru DING Ke-jian ZHOU Yi-lin State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Key Laboratory of Integrated Pest Management on Tropical Crops Ministry of Agriculture/Environment and Plant Protection InstituteChinese Academy of Tropical Agricultural Sciences College of Plant Protection Anhui Agricultural University

In order to clarify the impact posed by wheat powdery mildew （Blumeria graminis f. sp. tritici） on the yield and yield components in different epidemic seasons, field trials were conducted in three growing seasons, 2009-2010, 2010-2011 and 2011-2012, in Langfang City, Hebei Province, China. The relationships between 1000-kernel weight, crude protein content of grain and yield and disease index （DI）, as well as area under disease progress curve （AUDPC） were studied. The models of the percentage of loss of 1000-kernel weight, crude protein content and yield were constructed using DI at critical point （CP） of growth stages （GS） and AUDPC in the three growing seasons, respectively. The CPs for estimating 1 000-kernel weight, crude protein content of grain and yield of wheat caused by powdery mildew were GS 11.1, GS 10.5.3 and GS l 0.5.3, respectively. Models based on DI at CP to estimate the percentage of loss of 1000-kernel weight, crude protein content of grain and yield were better than models based on AUDPC. And models of the percentage of loss of 1000-kernel weight, crude protein content and yield for 2011-2012 season were significant different from these for 2009-2010 and 2010-2011 seasons. These results indicated that besides powdery mildew, weather conditions also had influence on 1 000-kernel weight, crude protein content of grain and yield loss of wheat when powdery mildew occurred.

关键词： wheat powdery mildew yield 1000-kemel weight crude protein content loss

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Quality Analysis and Evaluation of Maize Cultivars Approved by Shanxi Province

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Agricultural Science & Technology 2016年第3期17卷 555-560页

作者：智建奇武海丽马淑文赵力赵鑫焦建伟山西省农业科学院玉米研究所山西忻州034000

[Objective] This study aimed to provide a theoretical basis for the genetic improvement of maize quality in Shanxi Province. [Method] The variations in unit weight, crude starch content, crude protein content, crude fat content and lysine content of maize cultivars approved by Shanxi Province during 2003-2012 were analyzed. [Result] In Shanxi Province, the average unit weight and crude starch content of maize cultivars approved during 2003-2012 were trended to be increased;the crude fat contents of maize cultivars approved during 2003-2012 showed no significant changes; the lysine contents of maize cultivars approved during 2003-2008 were essentially unchanged; the crude protein contents of maize cultivars approved during 2003-2012 declined slightly. [Conclusion] The crude starch content and unit weight of maize increased with the increased yield; the crude protein content, crude fat content and lysine content showed certain stability, and they were mainly controlled by genes. Therefore, the breeding of particular maize should be strengthened.

关键词： Maize crude protein content crude fat content crude starch content Lysine content Unit weight

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