利用HRM功能标记检测黑龙江省水稻抗稻瘟病基因Pita和pik的基因型分布
2021-01-16郭震华黄翠红罗文龙黄晓群王瑞英陈志强关世武张淑华蔡丽君
郭震华 黄翠红 罗文龙 黄晓群 王瑞英 陈志强 关世武 张淑华 蔡丽君
摘要:为明确Pita及pik基因在黑龙江省水稻种质资源中的分布情况,本研究以67份黑龙江省主栽品种及优异种质资源作为试验材料,通过HRM技术,利用Pita及pik的HRM功能型分子标记Pita-G/T、Pik2-C/T,对67份材料进行基因分型。结果表明,67份种质中,含纯合Pita有27份,占参试种质的40.3%;纯合pik有22份,占参试种质的32.9%,同时含有两基因的为12份,比例为17.9%。综上,Pita-G/ T及Pik2-C/T标记可以高效准确地对黑龙江水稻资源进行基因分型,同时,通过基因分型,明确了Pita及pik在黑龙江省的分布情况,为抗稻瘟病育种提供了理论基础。
关键词:水稻;高分辨率熔解曲线;Pita基因;pik基因;基因分型
中图分类号:S326文献标志码:A论文编号:cjas20190900197
基金项目:国家重点研发计划“寒地早粳稻分子设计育种”(2016YFD0101801);黑龙江省农科院重大科研成果激励项目“Pita等抗稻瘟病基因在寒地稻区的分布研究”(2018KYJL001)。
Detection of the Rice Blast Resistance Genes Pita and pik in Heilongjiang: HRM Functional Markers
Guo Zhenhua1,2, Huang Cuihong2, Luo Wenlong2, Huang Xiaoqun1, Wang Ruiying1, Chen Zhiqiang2, Guan Shiwu1, Zhang Shuhua1, Cai Lijun3(1Rice Research Institute of Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, Heilongjiang, China;
2National Engineering Research Centre of Plant Space Breeding, Guangzhou 510642, Guangdong, China; 3Jiamusi Branches of Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, Heilongjiang, China)
Abstract: To clarify the distribution of Pita gene and pik gene in rice germplasm resources of Heilongjiang, 67 major varieties and excellent germplasm resources were used as materials with HRM (high resolution melting) technology. 67 materials were used for genotyping analysis by Pita-G/T and Pik2-C/T of Pita and pik HRMbased functional markers. The results showed that, among the 67 germplasm resources, 27 germplasm resources contained the homozygous gene Pita (40.3% of the total number), 22 germplasm resources contained the homozygous gene pik (32.9% of the total number) and 12 germplasm resources contained both of the two homozygous genes (17.9% of the total number). Based on the results, the functional markers Pita-G/T and Pik2-C/T could be efficiently and accurately used in rice genotyping in Heilongjiang, meanwhile, through genotyping the materials in this research, we clarified the distribution of those two genes in Heilongjiang, which provided a theoretical basis for rice blast resistance breeding.
Keywords: Rice; High Resolution Melting (HRM); Pita Gene; pik Gene; Genotyping
0引言
稻瘟病是目前影響水稻最为严重的一种病害,每年可造成水稻减产11%~30%[1],严重制约着水稻的高产、稳产。黑龙江省作为北方稻区的第一水稻大省,稻瘟病时有发生,危害严重,严重时可造成减产15%~ 20%。稻瘟病是由子囊菌Magnaporthe grisea(hebert) barr(无性世代:Pyricularia grisea (cooke) Sacc)引起的[2],在水稻整个生育期内及各个部位均可发生,其中尤以叶瘟影响最为严重。
水稻抗稻瘟病基因的分析最早在日本于20世纪60年代展开,共鉴定了最初的8个抗性位点上的14个基因(JDCs,Japanese differential cultivars)。截至2011年2月,多于75个抗稻瘟病的主效基因已被克隆。其中,包含Pia、Pib、Pita、Pi2、Piz-t、Pi9、Pid2等共18个基因已被成功克隆(China Rice Data Center , http:// www. ricedata.cn/gene/gene_pi.htm)。
Pita作为水稻中第2个被克隆的抗稻瘟病主效基因,位于水稻第12染色体的近着丝粒区域,是一个抗谱比较广的单拷贝显性基因,在抗病品种和感病品种中都有较低的组成型表达[3]。……
