{"title":"The induced mutant allele <i>flo4-303</i> confers floury characteristics on the japonica rice cultivar 'Hoshinoko'.","authors":"Shuichi Matsuba, Wakako Maruyama-Funatsuki, Takayuki Umemoto, Hideki Kato, Makoto Kuroki, Narifumi Yokogami, Tomohito Ikegaya, Hiroyuki Shimizu, Norio Iriki","doi":"10.1270/jsbbs.22059","DOIUrl":null,"url":null,"abstract":"<p><p>Rice flour is useful as a substitute for wheat flour, however, to obtain fine flour, millers need special milling facilities, which increase the cost of milling. To reduce the milling cost, we developed a floury mutant line by irradiating gamma-rays to dry seeds of the japonica cultivar 'Hoshinoyume'. The line was registered as a new cultivar, 'Hoshinoko'. Genetical analysis of the floury trait was conducted using an F<sub>2</sub> population derived from a cross between 'Hoshinoko' and 'Corbetti' (a japonica rice cultivar with normal endosperm), which indicated the involvement of a single recessive gene located near the RM163 marker on the long arm of rice chromosome 5, flanking <i>flo4</i> identified by Kang <i>et al.</i> (2005). Sequence analysis of <i>flo4</i> showed a two-bp (CA) insertion in the eighth exon of in 'Hoshinoko' compared to that of 'Hoshinoyume', which led to a frameshift mutation. The CAPS-based genotype of <i>flo4</i> gene completely correlated to the phenotype of endosperm in two populations. This CAPS marker could be helpful for rice breeders to develop new cultivars harboring floury endosperm of the <i>flo4-303</i> gene.</p>","PeriodicalId":9258,"journal":{"name":"Breeding Science","volume":"72 5","pages":"383-388"},"PeriodicalIF":2.0000,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9895802/pdf/","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Breeding Science","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1270/jsbbs.22059","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRONOMY","Score":null,"Total":0}
引用次数: 2
Abstract
Rice flour is useful as a substitute for wheat flour, however, to obtain fine flour, millers need special milling facilities, which increase the cost of milling. To reduce the milling cost, we developed a floury mutant line by irradiating gamma-rays to dry seeds of the japonica cultivar 'Hoshinoyume'. The line was registered as a new cultivar, 'Hoshinoko'. Genetical analysis of the floury trait was conducted using an F2 population derived from a cross between 'Hoshinoko' and 'Corbetti' (a japonica rice cultivar with normal endosperm), which indicated the involvement of a single recessive gene located near the RM163 marker on the long arm of rice chromosome 5, flanking flo4 identified by Kang et al. (2005). Sequence analysis of flo4 showed a two-bp (CA) insertion in the eighth exon of in 'Hoshinoko' compared to that of 'Hoshinoyume', which led to a frameshift mutation. The CAPS-based genotype of flo4 gene completely correlated to the phenotype of endosperm in two populations. This CAPS marker could be helpful for rice breeders to develop new cultivars harboring floury endosperm of the flo4-303 gene.
米粉作为小麦粉的替代品是有用的,然而,为了获得细粉,磨坊需要特殊的碾磨设备,这增加了碾磨的成本。为了降低碾磨成本,我们利用伽玛射线辐照粳稻‘星之玉’的干种子,开发了一种面粉突变系。该品系被注册为新品种“星野子”。利用“星野子”(Hoshinoko)和“Corbetti”(一种具有正常胚乳的粳稻品种)杂交的F2群体对面粉性状进行了遗传分析,结果表明,Kang等人(2005)发现,位于水稻5号染色体长臂RM163标记附近的单隐性基因参与了面粉性状的遗传分析。序列分析显示,与“Hoshinoyume”相比,“Hoshinoko”的第8外显子插入了2 bp (CA),这导致了移码突变。在两个种群中,flo4基因的caps基因型与胚乳表型完全相关。该CAPS标记可为水稻育种者培育含有fl4 -303基因的花粉胚乳新品种提供参考。
期刊介绍:
Breeding Science is published by the Japanese Society of Breeding. Breeding Science publishes research papers, notes and reviews
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