Performance of New Released Winter Wheat Cultivars in Yield: A Case Study in the North China Plain
文献类型： 外文期刊
作者： Zhang, Wenying 1 ; Wang, Bianyin 3 ; Liu, Binhui 3 ; Pang, Zhaojin 3 ; Wang, Xishen 3 ; Zhang, Xiying 4 ; Mei, Xurong 1 ;
作者机构： 1.CAAS, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
2.Minist Agr, Key Lab Dryland Agr, Beijing 100081, Peoples R China
3.Hebei Acad Agr & Forestry Sci, Dryland Farming Inst, Hengshui 053000, Peoples R China
4.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Shijiazhuang 050022, Peoples R China
期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）
ISSN： 0002-1962
年卷期： 2016 年 108 卷 4 期
页码：
收录情况： SCI
摘要： Genetic gains play important roles in crop yield improvement. This study used the observation data from two cultivar test sites under limited irrigation and without irrigation for 11 seasons from 2002 to 2013 in the North China Plain (NCP) to examine the yield and yield characters of newly released winter wheat (Triticum aestivum L.) cultivars as compared with the control (CK). Large seasonal yield variation of - 40 to 37% was observed due to the fluctuations in the weather condition. The average yield of newly released cultivars (NRs) was similar to that of the same control cultivar at the two sites during the 11 seasons, indicating that NRs had characters that responded to seasonal weather variation similarly and they might not be better in off setting the negative climatic effects on grain production as compared with the CK. However, there were always cultivars that out-performed the control in yield around 10% for the 11 seasons, indicating the possible genetic gains in using new cultivars. The number of seeds per area played a critical role in determining the final yield of winter wheat, which was significantly affected by the weather conditions during the seedling and vegetative growing stages. Selecting cultivars with high vitality at seedling stage was important in this region. Under rain-fed conditions, the significant positive correlation (P < 0.01) of percentage of the roots in deep soil with the final yield indicated the selection and breeding for root traits could result in a yield benefit.
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