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  • 陆展华,王晓飞,刘维,等.优质稻粤农丝苗抗倒伏影响因素和遗传分析[J].植物遗传资源学报,2021,22(3):638-645.    [点击复制]
  • LU Zhan-hua,WANG Xiao-fei,LIU Wei,et al.Influencing factors and genetic analysis of lodging resistance of high-quality rice ‘Yuenong Simiao’[J].植物遗传资源学报,2021,22(3):638-645.   [点击复制]
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优质稻粤农丝苗抗倒伏影响因素和遗传分析
陆展华, 王晓飞, 刘维, 卢东柏, 王石光, 薛皦, 何秀英
0
(广东省农业科学院水稻研究所/广东省水稻育种新技术重点实验室)
摘要:
倒伏影响水稻光合产物的生成和运输,稻谷霉变、发芽,加剧病虫害的发生,造成稻米品质下降和粮食减产甚至减半。抗倒性受株高、茎秆结构特性和栽培条件等多种因素影响。优质稻主栽品种‘粤农丝苗’抗倒伏性强、适应轻简化栽培模式,但其抗倒伏的主要影响因素仍不清楚。本研究对‘粤农丝苗’及由‘粤农丝苗’、倒伏品种‘象牙香占’,及‘粤农丝苗’ב象牙香占’的F2遗传分离群体的株高、单株抗折力,基部节间抗折力和茎秆结构等抗倒伏相关农艺性状进行分析。结果显示,相对于‘象牙香占’,‘粤农丝苗’基部节间短、壁厚、充实度高是其抗倒伏的重要结构基础;在F2群体中,N2节间的抗折力、节间长度、节间直径、茎秆壁厚可能受数量性状位点控制;相关性分析结果表明抗倒伏主要性状与株高、穗长的相关性较低,与茎秆直径和壁厚呈显著正相关,与节间的长度呈显著负相关,抗倒伏能力主要取决于节间的长度、粗细和茎秆壁的厚度。本研究为揭示‘粤农丝苗’抗倒伏的内在因素提供重要依据。
关键词:  水稻  倒伏  抗折力  茎秆
DOI:10.13430/j.cnki.jpgr.20200918003
投稿时间:2020-09-18修订日期:2020-10-19
基金项目:科技创新战略专项资金(高水平农科院建设)(R2016PY-JG001、R2018QD-008和R2016YJ-YB3005);广东省农业科学院“十三五”学科团队建设项目(201635TD);广东省农业科学院院长基金重点项目(201825);2019年广东省现代农业产业技术体系水稻创新团队项目(2019KJ105);广东省农业农村厅优质稻良种重大科研联合攻关(粤财农〔2019〕73号);广东省自然科学基金(2018A0303130172)。
Influencing factors and genetic analysis of lodging resistance of high-quality rice ‘Yuenong Simiao’
LU Zhan-hua, WANG Xiao-fei, LIU Wei, LU Dong-bai, WANG Shi-guang, XUE Jiao, HE Xiu-ying
(Rice Research Institute, Guangdong Academy of Agricultural Sciences / Guangdong Key Laboratory of New Technology in Rice Breeding)
Abstract:
Lodging affects the production and transportation of photosynthetic products, molding and germination of seed, which aggravates the occurrence of diseases and insect pests, and reduces the quality and yield of grains. Usually, lodging resistance is influenced by plant height, stem structure and cultivation conditions. ‘Yuenong Simiao’, a main rice variety with good quality, has strong lodging resistance and can adapt to simplified cultivation pattern. However, the main factors of lodging resistance are still unclear. In this research, the plant height, breaking-resistant strength of individual plant and of basal internode, and the stem structure of rice ‘Yuenong Simiao’, ‘Xiangya Xiangzhan’, and the F2 population of ‘Yuenong Simiao’ × ‘Xiangya Xiangzhan’ were analyzed. The results showed that the shorter basal internode, the thicker wall and the higher substantiality of the stem were the important structural basis of lodging resistance of ‘Yuenong Simiao’ in comparison to ‘Xiangya Xiangzhan’. In the F2 populations, internode resistance, internode length, internode diameter, and stem wall thickness of N2 internode may be controlled by QTLs. The lodging resistance was weakly correlated with plant height and panicle length, but significantly positively correlated with stem diameter and wall thickness, and negatively correlated with internode length. The lodging resistance is mainly depended on the internode length, thickness and wall thickness. This study provides an important basis for revealing the internal factors of lodging resistance of rice ‘Yuenong Simiao’.
Key words:  rice  lodging  breaking-resistant strength  stem

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