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利用水稻（Oryza sativa L.）加倍单倍体群体定位调控颖花脱落的新QTL

Mapping of Novel QTL Regulating Grain Shattering Using Doubled Haploid Population in Rice (Oryza sativa L.).

作者信息

Lee Gyu-Ho, Kang In-Kyu, Kim Kyung-Min

机构信息

Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National University, Daegu 702-701, Republic of Korea.

Department of Horticultural Science, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 702-701, Republic of Korea.

出版信息

Int J Genomics. 2016;2016:2128010. doi: 10.1155/2016/2128010. Epub 2016 Jun 22.

DOI:10.1155/2016/2128010
PMID:27419124
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4933857/
Abstract

The critical evolutionary step during domestication of major cereals was elimination of seed shattering because the easy-to-shatter trait in wild relatives results in a severe reduction in yield. In this study, we analyzed the QTLs associated with shattering employing a high-density genetic map in doubled haploid (DH) population of rice (Oryza sativa L.). A genetic linkage map was generated with 217 microsatellite markers spanning 2082.4 cM and covering 12 rice chromosomes with an average interval of 9.6 cM between markers based on 120 DHLs derived from a cross between Cheongcheong indica type cultivar and Nagdong japonica type cultivar. In the QTL analysis, five QTLs pertaining to the breaking tensile strength (BTS) were detected in 2013 and 2015. Two regions of the QTLs related to BTS on chromosome 1 and chromosome 6 were detected. Several important genes are distributed in 1 Mbp region of the QTL on chromosome 6 and they are related to the formation of abscission layer. We decide to name this QTL qSh6 and the candidate genes in the qSh6 region can be employed usefully in further research for cloning.

摘要

主要谷物驯化过程中的关键进化步骤是消除种子脱落，因为野生近缘种中易于脱落的特性会导致产量严重下降。在本研究中，我们利用水稻（Oryza sativa L.）加倍单倍体（DH）群体的高密度遗传图谱分析了与脱落相关的QTL。基于清仓籼稻品种和纳洞粳稻品种杂交产生的120个双单倍体（DHL），构建了一个包含217个微卫星标记的遗传连锁图谱，该图谱跨度为2082.4 cM，覆盖12条水稻染色体，标记间平均间隔为9.6 cM。在QTL分析中，2013年和2015年检测到5个与断裂拉伸强度（BTS）相关的QTL。检测到与染色体1和染色体6上BTS相关的QTL的两个区域。几个重要基因分布在染色体6上QTL的1 Mbp区域，它们与离层的形成有关。我们决定将这个QTL命名为qSh6，qSh6区域的候选基因可有效地用于进一步的克隆研究。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7ed/4933857/0695b44a35c3/IJG2016-2128010.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7ed/4933857/ee5434cef15d/IJG2016-2128010.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7ed/4933857/8224c4a290b5/IJG2016-2128010.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7ed/4933857/0695b44a35c3/IJG2016-2128010.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7ed/4933857/ee5434cef15d/IJG2016-2128010.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7ed/4933857/8224c4a290b5/IJG2016-2128010.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7ed/4933857/0695b44a35c3/IJG2016-2128010.003.jpg

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本文引用的文献

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Genetic control of seed shattering in rice by the APETALA2 transcription factor shattering abortion1.APETALA2 转录因子 shattering abortion1 控制水稻种子裂颖
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An SNP caused loss of seed shattering during rice domestication.一个单核苷酸多态性（SNP）导致了水稻驯化过程中种子落粒性的丧失。
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