摘要
【目的】通过测量分析水稻基部茎秆的物理性状,探究这些性状与茎秆抗折力的关系,明确影响水稻基部茎秆抗折力的核心性状,为水稻抗倒伏品种选育提供理论基础。【方法】分析水稻品种粤禾丝苗、易倒伏品种象牙香占以及粤禾丝苗×象牙香占的F_(2)遗传分离群体中与倒伏抗性相关的农艺性状,包括株高、单株抗弯力、基部节间抗折力和茎秆结构等,通过相关系数判断各性状对水稻抗倒伏性的影响大小。【结果】粤禾丝苗和象牙香占两个品种在抗倒伏性上存在显著差异。粤禾丝苗的N2(基部第2节间)抗折力(16.58 N)、N2壁厚(1.02 mm)、N2充实度(0.19 g/cm)、N2茎粗(6.21 mm)与象牙香占的N2抗折力(9.93 N)、N2壁厚(0.66 mm)、N2充实度(0.11 g/cm)、N2茎粗(4.60 mm)相比均明显较大。F_(2)群体N2抗折力、N2长度、N2茎粗、茎秆壁厚、鲜重和充实度均呈连续分布,属于数量性状,由多基因控制。F_(2)群体的相关性分析结果表明,N2抗折力与株高呈正相关(r=0.18),N2抗折力与N2壁厚呈极显著正相关(r=0.75**);N2抗折力与N2充实度呈显著正相关(r=0.67*);N2抗折力与N2短轴呈正相关(r=0.52)、N2茎粗与N2长度呈负相关(r=-0.20)。【结论】粤禾丝苗×象牙香占F_(2)群体抗倒伏遗传机制研究表明,N2壁厚与N2抗折力呈极显著正相关,是茎秆抗倒伏的核心性状,是一个由多基因控制的数量性状。以N2壁厚为研究重点,将大大降低以往抗倒伏研究方法的复杂程度,为今后抗倒伏相关研究明确了目标和方向。
【Objective】By measuring and analyzing the physical characteristics of the basal stems of rice,the relationship between these traits and the stem breaking resistance was explored,and the core traits affecting the basal stem breaking resistance of rice were identified,providing a theoretical basis for the breeding of rice lodging-resistant varieties.【Method】The study analyzed the lodging resistance-related agronomic traits,including plant height,single plant bending resistance,basal internode breaking resistance,and stem structure,of the rice variety Yuehesimiao,the lodging-susceptible variety Xiangyaxiangzhan,and Yuehesimiao×Xiangyaxiangzhan F_(2) segregation populations.The influence of each trait on lodging resistance of rice was evaluated by correlation coefficient.【Result】There are significant differences in lodging resistance between the two varieties of Yuehesimiao and Xiangyaxiangzhan.The N2(second internode from the base)breaking resistance(16.58 N),N2 wall thickness(1.02 mm),N2 filling degree(0.19 g/cm),and N2 stem diameter(6.21 mm)of Yuehesimiao are significantly larger than those of Xiangyaxiangzhan(N2 breaking resistance:9.93 N,N2 wall thickness:0.66 mm,N2 filling degree:0.11 g/cm,N2 stem diameter:4.60 mm).The N2 breaking resistance,N2 length,N2 stem diameter,stem wall thickness,fresh weight and filling degree of the F_(2) population show continuous distribution and are controlled by polygenes.The correlation analysis results of the F_(2) population show that,N2 breaking resistance is positively correlated with plant height(r=0.18),N2 breaking resistance is significantly positively correlated with N2 wall thickness(r=0.75**).N2 breaking resistance is significantly positively correlated with N2 filling degree(r=0.67*).N2 breaking resistance is positively correlated with N2 minor axis(r=0.52)and N2 stem diameter is negatively correlated with N2 length(r=-0.20).【Conclusion】The genetic mechanism of lodging resistance in the F_(2) population of Yuehesimiao×Xiangyaxiangzhan shows that N2 wa
作者
王晓飞
陆展华
刘维
王石光
陈浩
巫浩翔
何秀英
WANG Xiaofei;LU Zhanhua;LIU Wei;WANG Shiguang;CHEN Hao;WU Haoxiang;HE Xiuying(Rice Research Institute,Guangdong Academy of Agricultural Sciences/Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China(Co-construction by Ministry and Province),Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of New Technology in Rice Breeding/Guangdong Rice Engineering Laboratory,Guangzhou 510640,China)
出处
《广东农业科学》
CAS
2023年第12期140-149,共10页
Guangdong Agricultural Sciences
基金
广东省自然科学基金(2021A1515010820)
广东省现代农业产业技术体系专项(2023KJ105)
广东省水稻育种新技术重点实验室项目(2023B1212060042)。
关键词
水稻
粤禾丝苗
抗倒伏
茎秆
基部节间壁厚
rice
Yuehesimiao
lodging resistance
stem
basal internode wall thickness
