Jiang Tao, Zhang Chenghua, Zhang Zhi, Wen Min, Qiu Hongbo
College of Agriculture, Guizhou University, Guiyang, 550025 China.
Shandong Academy of Agricultural Sciences, Jinan, 250100 China.
Physiol Mol Biol Plants. 2023 Mar;29(3):435-445. doi: 10.1007/s12298-023-01300-0. Epub 2023 Mar 30.
Low-phosphorus stress significantly impacts the development of maize kernels. In this study, the phosphor efficient maize genotype 082 and phosphor deficient maize genotype Ye107, were used to construct an F population. QTL mapping was then employed to determine the genetic basis of differences in the maize kernel traits of the two parents in a low-phosphorus environment. This analysis revealed several major QTL that control environmental impacts on kernel length, width, thickness, and weight. These QTL were detected in all three environments and were distributed on five genome segments of chromosomes 3, 5, 6, and 9, and some new kernel-trait QTL were also detected (eg: , , , and ). These environmentally insensitive QTL can be stably expressed in low phosphorus environments, indicating that they can lay a foundation for the breeding of high phosphorus utilization efficiency germplasm.
The online version contains supplementary material available at 10.1007/s12298-023-01300-0.
低磷胁迫对玉米籽粒发育有显著影响。本研究利用磷高效玉米基因型082和缺磷玉米基因型掖107构建F群体。然后采用QTL定位来确定低磷环境下两个亲本玉米籽粒性状差异的遗传基础。该分析揭示了几个控制环境对籽粒长度、宽度、厚度和重量影响的主要QTL。这些QTL在所有三种环境中均被检测到，分布在第3、5、6和9号染色体的五个基因组区段上，同时还检测到了一些新的籽粒性状QTL（如： ， ， ，和 ）。这些对环境不敏感的QTL在低磷环境中能稳定表达，表明它们可为高磷利用效率种质的选育奠定基础。
在线版本包含可在10.1007/s12298-023-01300-0获取的补充材料。
