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水稻穗颈维管束数目稳定QTL的鉴定与特征分析

Identification and characterization of stable QTLs for vascular bundle number at the panicle neck in rice ( L.).

作者信息

Nguyen Ha Thi Le, Suetsugu Shizuka, Nakamura Yuna, Demeter Zita, Zheng Shao-Hui, Fujita Daisuke

机构信息

The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-8580, Japan.

Forest Science Institute of South Vietnam, 1 Pham Van Hai, Tan Binh District, Ho Chi Minh City, Viet Nam.

出版信息

Breed Sci. 2023 Sep;73(4):365-372. doi: 10.1270/jsbbs.23013. Epub 2023 Sep 9.

DOI:10.1270/jsbbs.23013
PMID:38106512
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10722095/
Abstract

A large vascular bundle number (VBN) in the panicle neck in rice ( L.) is related to the ability to transport assimilates from stem and leaf to reproductive organs during seed maturation. Several quantitative trait loci (QTLs) for VBN have been identified by using segregating populations derived from a cross between and rice cultivars. However, the detailed location, effect, and interaction of QTLs for VBN were not understood well. Here, to elucidate the genetic basis of VBN, we identified three stable QTLs for VBN-, and -by using 71 recombinant inbred lines derived from a cross between 'IR24' and 'Asominori'. We confirmed their positions and characterized their effects by using chromosome segment substitution lines (CSSLs) with an 'IR24' genetic background. had the most substantial effect on VBN, followed by and . We developed pyramided lines carrying two QTLs for VBN to estimate their interaction. The combination of and accumulated VBN negatively in the pyramided lines owing to the independent actions of each QTL. The QTLs detected for VBN will enhance our understanding of genetic mechanisms of VBN and can be used in rice breeding.

摘要

水稻穗颈中较大的维管束数量（VBN）与种子成熟期间从茎和叶向生殖器官转运同化物的能力有关。通过使用由两个水稻品种杂交产生的分离群体，已经鉴定出了几个与VBN相关的数量性状基因座（QTL）。然而，VBN相关QTL的详细位置、效应和互作尚不清楚。在此，为了阐明VBN的遗传基础，我们利用由“IR24”和“Asominori”杂交产生的71个重组自交系，鉴定出了三个与VBN相关的稳定QTL——qVBN-1、qVBN-2和qVBN-3。我们通过使用具有“IR24”遗传背景的染色体片段代换系（CSSL）确定了它们的位置并对其效应进行了表征。qVBN-1对VBN的影响最大，其次是qVBN-2和qVBN-3。我们构建了携带两个VBN相关QTL的聚合系来评估它们的互作。由于每个QTL的独立作用，qVBN-2和qVBN-3的组合在聚合系中对VBN有负向累加效应。检测到的VBN相关QTL将增进我们对VBN遗传机制的理解，并可用于水稻育种。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/8635b9d1b294/73_365-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/8fdae9123352/73_365-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/b3ce5b21106c/73_365-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/f2ae35bf9f3d/73_365-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/e90a3a0ff9a2/73_365-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/8635b9d1b294/73_365-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/8fdae9123352/73_365-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/b3ce5b21106c/73_365-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/f2ae35bf9f3d/73_365-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/e90a3a0ff9a2/73_365-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f7c/10722095/8635b9d1b294/73_365-g005.jpg

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Genetic basis of vascular bundle variations in rice revealed by genome-wide association study.基因组关联研究揭示了水稻维管束变异的遗传基础。
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Multiple areas investigation reveals the genes related to vascular bundles in rice.
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