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利用GRAS-Di技术检测从日本野生甘蔗中继承的与黑穗病抗性相关的一个主要数量性状基因座。

Detection of a major QTL related to smut disease resistance inherited from a Japanese wild sugarcane using GRAS-Di technology.

作者信息

Umeda Makoto, Sakaigaichi Takeo, Tanaka Minoru, Tarumoto Yusuke, Adachi Katsuki, Hattori Taiichiro, Hayano Michiko, Takahashi Hiroyuki, Tamura Yasuaki, Kimura Tatsuro, Mori Masaaki

机构信息

NARO Kyushu Okinawa Agricultural Research Center, Tanegashima Sugarcane Breeding Site, 1742-1 Anno, Nishinoomote, Kagoshima 891-3102, Japan.

NARO Kyushu Okinawa Agricultural Research Center, Miyakonojo Research Station, 6651-2 Yokoichi-cho, Miyakonojo, Miyazaki 885-0091, Japan.

出版信息

Breed Sci. 2021 Jun;71(3):365-374. doi: 10.1270/jsbbs.20137. Epub 2021 Jun 19.

DOI:10.1270/jsbbs.20137
PMID:34776743
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8573549/
Abstract

Smut disease of sugarcane causes considerable yield losses and the use of resistant varieties is the best control practice. Our group identified a Japanese wild sugarcane with highly smut disease resistance named 'Iriomote8'. In this study, we conducted QTL analysis for smut disease resistance using a mapping population derived from a resistant variety 'Yaenoushie', in which resistance is inherited from 'Iriomote8'. We identified 4813 non-redundant markers using GRAS-Di technology and developed a linkage map of mapping parents. We evaluated smut disease resistance of the mapping population by the inoculation test. Consequently, a large number of clones did not show the disease symptoms and the distribution of smut disease incidence tended to be "L shaped". Composite interval mapping detected an identical QTL for indices of smut disease incidence with a markedly high LOD score (26.6~45.6) at the end of linkage group 8 of 'Yaenoushie'. This QTL explained approximately 50% of the cases of smut disease incidence. In the mapping population, there were no correlations between the indices of smut disease incidence and other agronomic traits. In conclusion, this QTL could be used for marker-assisted selection to significantly improve smut disease resistance without negative effects on other agronomic traits.

摘要

甘蔗黑穗病会导致产量大幅损失，使用抗病品种是最佳防治措施。我们的团队鉴定出一种对黑穗病具有高度抗性的日本野生甘蔗，名为“Iriomote8”。在本研究中，我们利用一个源自抗病品种“八重上江”的作图群体进行黑穗病抗性的QTL分析，“八重上江”的抗性遗传自“Iriomote8”。我们使用GRAS-Di技术鉴定出4813个非冗余标记，并构建了作图亲本的连锁图谱。我们通过接种试验评估了作图群体的黑穗病抗性。结果，大量克隆未表现出病害症状，黑穗病发病率的分布呈“L形”。复合区间作图在“八重上江”的连锁群8末端检测到一个与黑穗病发病率指标相同的QTL，其LOD得分显著较高（26.6~45.6）。该QTL解释了约50%的黑穗病发病情况。在作图群体中，黑穗病发病率指标与其他农艺性状之间没有相关性。总之，该QTL可用于标记辅助选择，以显著提高黑穗病抗性，且对其他农艺性状无负面影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/98db/8573549/1e315d410bfd/71_365-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/98db/8573549/e3f5f8f5c181/71_365-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/98db/8573549/f66bb483822d/71_365-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/98db/8573549/1e315d410bfd/71_365-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/98db/8573549/e3f5f8f5c181/71_365-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/98db/8573549/f66bb483822d/71_365-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/98db/8573549/1e315d410bfd/71_365-g003.jpg

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