Joint Centre for Crop Improvement, Faculty of Agriculture, Forestry and Horticulture, The University of Melbourne, 3052, Parkville, Victoria, Australia.
Theor Appl Genet. 1996 Mar;92(3-4):382-7. doi: 10.1007/BF00223683.
The genetic control of adult-plant blackleg (Leptosphaeria maculans) resistance in a Brassica napus line (579NO48-109-DG-1589), designated "R13" possessing Brassica juncea-like resistance (JR), was elucidated by the analysis of segregation ratios in F2 and F3 populations from a cross between "R13" and the highly blackleg-susceptible B. napus cultivar "Tower". The F2 segregration ratios were bimodal, demonstrating that blackleg resistance in "R13" was controlled by major genes. Analysis of the segregation ratios for 13 F3 families indicated that blackleg resistance in these families was controlled by three nuclear genes, which exhibited a complex interaction. Randomly sampled plants of F3 progeny all had the normal diploid somatic chromosome number for B. napus. The similarities between the action of the three genes found in this study with those controlling blackleg resistance in B. juncea is discussed.
利用“R13”（具有芥菜型抗性（JR））和高感黑胫病油菜品种“Tower”杂交的 F2 和 F3 群体的分离比分析，阐明了油菜中成株黑胫病（Leptosphaeria maculans）抗性的遗传控制。F2 分离比呈双峰分布，表明“R13”中的黑胫病抗性由主基因控制。对 13 个 F3 家系分离比的分析表明，这些家系中的黑胫病抗性由三个核基因控制，这些基因表现出复杂的相互作用。F3 后代随机取样的植物均具有油菜正常的二倍体体细胞染色体数。本文讨论了这三个基因的作用与控制芥菜型油菜黑胫病抗性的基因的作用之间的相似性。
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