生菜霜霉病（Bremia lactucae）抗性基因的连锁分析。

Linkage analysis of genes for resistance to downy mildew (Bremia lactucae) in lettuce (Lactuca sativa).

机构信息

Department of Vegetable Crops, University of California, 95616, Davis, CA, USA.

出版信息

Theor Appl Genet. 1985 Aug;70(5):520-8. doi: 10.1007/BF00305985.

Abstract

The genetics of specific resistance was studied in F2 populations which segregated for either one or two resistance genes. The resistance factors 1, 11 and 14 which had not previously been characterized genetically segregated as single dominant genes (Dm). Resistance was determined by three linkage groups; R 1/14, 2, 3, and 6 in the first, R 5/8, and 10 in the second and R 4, 7 and 11 in the third. Cultivars of lettuce commonly used in the differential series to detect virulence to R3 and R10, were demonstrated to carry two tightly linked resistance genes. Implications of this linkage arrangement to the manipulation and characterization of these resistance genes are discussed.

摘要

特异性抗性的遗传学在 F2 群体中进行了研究，这些群体分离出一个或两个抗性基因。以前没有进行遗传特征分析的抗性因子 1、11 和 14 作为单显性基因（Dm）分离。抗性由三个连锁群决定；第一连锁群的 R1/14、2、3 和 6，第二连锁群的 R5/8 和 10，以及第三连锁群的 R4、7 和 11。在用于检测 R3 和 R10 毒力的差异系列中常用的生菜品种被证明携带两个紧密连锁的抗性基因。这种连锁排列对这些抗性基因的操纵和特征分析的影响进行了讨论。