陆地棉核心种质茎秆硬度与纤维品质及产量相关性状的相关性分析

RAZA Irum，胡道武，AHMAD Adeel，李洪戈，何守朴，NAZIR Mian Faisal，王晓阳，贾银华，潘兆娥，张鹏，YASIR Muhammad，IQBAL Muhammad Shahid，耿晓丽，王立如，庞宝印，杜雄明

背景：茎秆硬度是影响陆地棉（Gossypium hirsutum L.）株型结构的主要因素之一，评价硬度表型性状对于选择抗倒伏陆地棉优良品系非常重要。棉花育种家对利用不同基因型来改善纤维品质、提高产量很感兴趣，但有关茎秆硬度与纤维品质和产量的关系研究却很少。本研究旨在探讨陆地棉茎秆硬度与纤维品质及产量性状的关系。

结果：对237份陆地棉种质进行了茎秆弯曲、针刺和压缩特性的测定。结果表明，不同材料间茎秆硬度的差异极显著，茎秆硬度性状（BL、BU、AL、AU、CL、CU）与纤维品质性状和产量相关性状呈正相关。在描述性统计中，弯曲度（BL和BU）的变异系数最大，而纤维长度和纤维强度的变异系数较小。通过主成分分析（PCA），特征值大于1的前9个主成分（PC）解释了237份棉花材料86%的变异。在2017年和2018年，PCA结果均显示BL，BU，FL，FE和LI对PC₁的贡献较大，而BU，AU，CU，FD，LP和FWPB对PC₂的贡献较大。

结论：本文系统地研究了陆地棉茎秆弯曲强度、针刺和压缩特性对提高纤维品质和产量的调控机制。

TiTle:Correlation analysis of stem hardness traits with fiber and yield-related traits in core collections of Gossypium hirsutum

Authors: RAZA Irum, HU Daowu, AHMAD Adeel, LI Hongge, HE Shoupu, NAZIR Mian Faisal, WANG Xiaoyang, JIA Yinhua, PAN Zhaoe, ZHANG Peng, YASIR Muhammad, IQBAL Muhammad Shahid, GENG Xiaoli, WANG Liru, PANG Baoyin and DU Xiongming

[Background] Stem hardness is one of the major influencing factors for plant architecture in upland cotton (Gossypium hirsutum L.). Evaluating hardness phenotypic traits is very important for the selection of elite lines for resistance to lodging in Gossypium hirsutum L. Cotton breeders are interested in using diverse genotypes to enhance fiber quality and high-yield. Few pieces of research for hardness and its relationship with fiber quality and yield were found. This study was designed to find the relationship of stem hardness traits with fiber quality and yield contributing traits of upland cotton.

[Results] Experiments were carried out to measure the bending, acupuncture, and compression properties of the stem from a collection of upland cotton genotypes, comprising 237 accessions. The results showed that the genotypic difference in stem hardness was highly significant among the genotypes, and the stem hardness traits (BL, BU, AL, AU, CL, and CU) have a positive association with fiber quality traits and yield-related traits. Statistical analyses of the results showed that in descriptive statistics result bending (BL, BU) has a maximum coefficient of variance, but fiber length and fiber strength have less coefficient of variance among the genotypes. Principal component analysis (PCA) trimmed quantitative characters into nine principal components. The first nine principal components (PC) with Eigenvalues >?1 explained 86% of the variation among 237 accessions of cotton. Both 2017 and 2018, PCA results indicated that BL, BU, FL, FE, and LI contributed to their variability in PC1, and BU, AU, CU, FD, LP, and FWPB have shown their variability in PC2.

[Conclusion] We describe here the systematic study of the mechanism involved in the regulation of enhancing fiber quality and yield by stem bending strength, acupuncture, and compression properties of G. hirsutum.

Journal of Cotton Research. 2021, 4: 8

https://doi.org/10.1186/s42397-021-00082-8

https://jcottonres.biomedcentral.com/articles/10.1186/s42397-021-00082-8