Genotypic Variation in Cotton Genotypes for Phosphorus-Use Efficiency

文献类型： 外文期刊

第一作者： Iqbal, Asif

作者： Iqbal, Asif;Gui, Huiping;Zhang, Hengheng;Wang, Xiangru;Pang, Nianchang;Dong, Qiang;Song, Meizhen

作者机构：

关键词： Gossypium hirsutum L.; cotton genotypes; phosphorus uptake efficiency; phosphorus utilization efficiency; cotton breeding; environmental sustainability; cotton cultivation

期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）

ISSN：

年卷期： 2019 年 9 卷 11 期

页码：

收录情况： SCI

摘要： Low phosphorus (P) availability is a major constraint for cotton production. Consequently, P-efficient genotypes can improve productivity under conditions where the higher application of P is not economical. This study was conducted to characterize cotton genotypes for P-use efficiency under various P concentrations (0, 10, 20, 40, 80, and 500 mu M KH2PO4). The results showed large genotypic variation in five selected traits, such as root dry weight, shoot dry weight, photosynthetic activity, P-utilization efficiency, and P-uptake efficiency. Based on these five selected traits, the genotypes were grouped into three main classes as efficient, moderate efficient, and inefficient genotypes as proposed by different researchers. Most of the genotypes behaved in a similar pattern under different P concentrations. Among the genotypes, Xinluzao-49 and Xinluzao-48 were considered as P efficient while CCRI-64 and Yumian-21 as inefficient genotypes. However, the rest of the genotypes were considered as moderately P efficient. The results prove that a large genetic potential exists in cotton genotypes for P-use efficiency, and the use of P-efficient genotypes for cultivation will reduce the application of phosphatic fertilizers. Furthermore, the use of P-efficient genotypes will improve cotton breeding activities and help in improving the environmental sustainability of cotton production.

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