Changes in photo-thermal sensitivity of widely grown Chinese soybean cultivars due to a century of genetic improvement
文献类型: 外文期刊
第一作者: Wang, Caijie
作者: Wang, Caijie;Wu, Tingting;Wu, Cunxiang;Jiang, Bingjun;Sun, Shi;Hou, Wensheng;Han, Tianfu
作者机构:
关键词: photo-thermal sensitivity;soybean;widely grown;broad adaptation
期刊名称:PLANT BREEDING ( 影响因子:1.832; 五年影响因子:1.956 )
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年卷期:
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收录情况: SCI
摘要: Photo-thermal sensitivity is a crucial factor that determines the phenology, adaptation and yield production of soybean. However, the change of photo-thermal sensitivity due to a long process of soybean breeding remains unknown. To better understand this unique characteristic of soybean, we sought to evaluate the genetic improvement in photo-thermal sensitivity of 63 widely grown soybean cultivars, spanning 83years of breeding (1923-2006), from four main subregions in China. Days to the first flower was measured, and photo-thermal sensitivity was calculated. We found that photo-thermal sensitivity of cultivars in the northern Heilongjiang (NH) region showed a quadratic relationship with year of release. However, photo-thermal sensitivity was negatively correlated with year of release in the Huang-Huai-Hai Valley (HH) region. There were no significant trends of change found in the mid-southern Heilongjiang (MSH) and Jilin and Liaoning (JL) regions. The changing trend of photo-thermal sensitivity was relatively consistent across different environments, particularly in the NH and HH regions (photoperiod, temperature or planting year). The insensitivity to photo-thermal condition provided an advantage for modern cultivars to achieve broad adaptation.
分类号: S3
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