Mangi Naimatullah, Nazir Mian Faisal, Wang Xiaoyan, Iqbal Muhammad Shahid, Sarfraz Zareen, Jatoi Ghulam Hussain, Mahmood Tahir, Ma Qifeng, Shuli Fan
State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
Anyang Institute of Technology, College of Biology and Food Engineering, Anyang 455000, China.
Plants (Basel). 2021 Jun 4;10(6):1147. doi: 10.3390/plants10061147.
Photosynthesis as a source is a significant contributor to the reproductive sink affecting cotton yield and fiber quality. Moreover, carbon assimilation from subtending leaves adds up a significant proportion to the reproductive sink. Therefore, this study aimed to address the source-sink relationship of boll subtending leaf with fiber quality and yield related traits in upland cotton. A core collection of 355 upland cotton accessions was subjected to subtending leaf removal treatment effects across 2 years. The analysis of variance suggested a significant effect range in the source-sink relationship under subtending leaf removal effects at different growth stages. Further insight into the variation was provided by the correlation analysis and principal component analysis. A significant positive correlation between different traits was observed and the multivariate analysis including hierarchical clustering and principal component analysis (PCA) categorised germplasm accessions into three groups on the basis of four subtending leaf removal treatment effects across 2 years. A set of genotypes with the lowest and highest treatment effects has been identified. Selected accessions and the outcome of the current study may provide a basis for a further study to explore the molecular mechanism of source-sink relationship of boll subtending leaf and utilization of breeding programs focused on cotton improvement.
光合作用作为一种来源，是影响棉花产量和纤维品质的生殖库的重要贡献因素。此外，苞叶的碳同化对生殖库有很大比例的贡献。因此，本研究旨在探讨陆地棉中棉铃苞叶的源库关系与纤维品质及产量相关性状之间的关系。对355份陆地棉种质核心收集品进行了连续两年的苞叶去除处理效应研究。方差分析表明，在不同生长阶段进行苞叶去除处理时，源库关系存在显著的效应范围。相关性分析和主成分分析进一步揭示了其中的变异情况。观察到不同性状之间存在显著的正相关，包括层次聚类和主成分分析（PCA）在内的多变量分析根据连续两年的四种苞叶去除处理效应将种质分为三组。已鉴定出一组处理效应最低和最高的基因型。所选种质及本研究结果可为进一步探索棉铃苞叶源库关系的分子机制以及利用育种计划改良棉花提供依据。
