As one of the main rice establishment methods, direct seeding has the advantages of saving labour and reducing costs for farmers. However, the expansion of direct seeding has been constrained by poorly levelled fields, heavy rainfall and poor drainage after sowing. The development of cultivars with anaerobic germination tolerance could improve or overcome these shortcomings of most rice under flooding conditions. In this study, a japonica‐type rice with anaerobic germination tolerance was suggested as a new genetic source and QTL analysis was carried out to improve adaptation to direct seeding. Three QTLs, qAG1, qAG3 and qAG11, were identified, explaining 13.44%, 6.71% and 14.52% of the phenotypic variance, respectively. In an evaluation of the most effective QTL combination, two QTL combinations (qAG1^NP + qAG3^PBR + qAG11^PBR and qAG1^NP + qAG11^PBR) showed stable survival rates under submergence of filed condition. Based on the results, we will characterize the candidate genes within the detected target regions in further research, and the lines with advantageous alleles will be used to develop reliable cultivars to support the wide adoption of direct‐seeding practices in japonica rice.

中文翻译：

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粳型杂草稻地方品种PBR对厌氧萌发耐性的QTL定位和效应确认

作为主要的水稻种植方法之一，直接播种具有节省人工和降低农民成本的优点。然而，直接播种的扩大受到田间水平差，降雨大和播种后排水不畅的限制。具有耐厌氧性发芽的品种的开发可以改善或克服大多数水稻在水淹条件下的这些缺点。在这项研究中，有人建议将具有厌氧发芽耐受性的粳型水稻作为新的遗传来源，并进行了QTL分析，以提高其对直播的适应性。三个QTL，qAG1，qAG3和qAG11，进行了鉴定，分别解释了表型差异的13.44％，6.71％和14.52％。在评估最有效的QTL组合时，两种Q​​TL组合（qAG1 ^NP  +  qAG3 ^PBR  +  qAG11 ^PBR和qAG1 ^NP  +  qAG11 ^PBR）在淹没条件下显示出稳定的存活率。根据结果​​，我们将在进一步的研究中表征检测到的目标区域内的候选基因，并将使用具有有利等位基因的品系来开发可靠的栽培品种，以支持在粳稻中广泛采用直接播种。