Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR 72701, USA.
Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Genes (Basel). 2021 Oct 24;12(11):1690. doi: 10.3390/genes12111690.
Rice ( L.) is the primary food for half of the global population. Recently, there has been increasing concern in the rice industry regarding the eating and milling quality of rice. This study was conducted to identify genetic information for grain characteristics using a recombinant inbred line (RIL) population from a japonica/indica cross based on high-throughput SNP markers and to provide a strategy for improving rice quality. The RIL population used was derived from a cross of "Kaybonnet (KBNT )" and "ZHE733" named the K/Z RIL population, consisting of 198 lines. A total of 4133 SNP markers were used to identify quantitative trait loci (QTLs) with higher resolution and to identify more accurate candidate genes. The characteristics measured included grain length (GL), grain width (GW), grain length to width ratio (RGLW), hundred grain weight (HGW), and percent chalkiness (PC). QTL analysis was performed using QTL IciMapping software. Continuous distributions and transgressive segregations of all the traits were observed, suggesting that the traits were quantitatively inherited. A total of twenty-eight QTLs and ninety-two candidate genes related to rice grain characteristics were identified. This genetic information is important to develop rice varieties of high quality.
大米（L.）是全球一半人口的主要食物。最近，稻米行业越来越关注稻米的食用和碾磨品质。本研究旨在利用基于高通量 SNP 标记的籼稻/粳稻杂交重组自交系（RIL）群体，鉴定与粒型特征相关的遗传信息，并为提高稻米品质提供策略。所用的 RIL 群体来源于名为 K/Z RIL 群体的“Kaybonnet（KBNT）”和“ZHE733”之间的杂交，由 198 个系组成。共使用了 4133 个 SNP 标记来鉴定具有更高分辨率的数量性状位点（QTL），并鉴定更准确的候选基因。所测量的特征包括粒长（GL）、粒宽（GW）、长宽比（RGLW）、百粒重（HGW）和垩白率（PC）。使用 QTL IciMapping 软件进行 QTL 分析。所有性状均观察到连续分布和超亲分离，表明这些性状是数量遗传的。共鉴定到与水稻粒型特征相关的 28 个 QTL 和 92 个候选基因。这些遗传信息对于开发优质水稻品种非常重要。
