4个小麦—柔软滨麦草易位系苗期抗条锈基因的遗传分析  

Genetic Analysis of Seedling Resistance to Stripe Rust in Four Wheat-Leymus mollis Translocation Lines

作　　者：张玉[1] 李倩[1] 巢凯翔[1] 薛楠[1] 吴蕾[1] 井金学[1] 李强[1] 王保通[1] 

机构地区：[1]旱区作物逆境生物学国家重点实验室/西北农林科技大学植物保护学院,陕西杨凌712100

出　　处：《西北农业学报》2015年第2期45-50,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家"973"(2013CB127705)项目;国家"863"子课题(2012AA101503);陕西省科技统筹项目(2012KTCL02-10);国家"十二五"科技支撑计划(2012BAD19B04);国家自然科学基金(31000846);高等学校学科创新引智计划(B07049)

摘　　要：旨在开发和利用柔软滨麦草的基因,丰富小麦抗条锈基因库。利用小麦条锈菌流行小种CYR32和CYR33对M851-1、M8724-1、M8725-2和M8657-2 4个小麦-柔软滨麦草易位系进行苗期抗条锈性遗传分析。结果表明,M851-1对CYR32的抗条锈性由1对隐性基因控制;M8724-1对CYR32的抗条锈性由2对隐性基因独立作用控制,对CYR33的抗条锈性由1对隐性基因控制;M8725-2对CYR32的抗条锈性由2对显性基因互补作用控制,对CYR33的抗条锈性由1显1隐2对基因独立控制;M8657-2对CYR32的抗条锈性由1对隐性基因控制,对CYR33的抗条锈性由2对显性基因独立作用控制。研究结果初步明确这4个小麦-柔软滨麦草易位系抗条锈性遗传规律,有助于进一步利用这些易位系进行小麦抗条锈病育种。Wheat stripe rust,caused by Puccinia striiformis f. sp. tritici （Pst） ,is one of the most im- portant diseases of wheat in China. Breeding and growing resistant cultivars is the most effective ap- proach to control the disease. To develop and use stripe rust resistance gene（s） from Leymus mollis, the prevalent Pst races CYR32 and CYR33 were used to identify F~ , F2, and F3 generations derived from wheat-Leymus mollis translocation lines M851-1, M8724-1, M8725-2 and M8657-2 crossed with wheat cultivar Mingxian 169 at the seedling stage under controlled greenhouse condition. The genetic analysis results showed that the resistance of M851 to Pst race CYR32 was controlled by one recessive gene; the resistance of M8724-1 to CYR32 was controlled by two recessive genes,and to CYR33 was controlled by one recessive gene; the resistance of M8725-2 to CYR32 was controlled by two dominant complementary genes and to CYR33 was controlled by one dominant gene and one recessive gene; the resistance of M8657-2 to CYR32 was controlled by one recessive gene and to CYR33 were controlled by two dominant genes. The results will further accelerate application of these translocation lines in wheat breeding programs.

关 键 词：小麦条锈病 小麦-柔软滨麦草易位系 抗条锈病基因 遗传分析 

分 类 号：S512.1[农业科学—作物学]