HERITABILITY AND NUMBER OF GENES CONTROLLING LEAF RUST RESISTANCE IN FOUR CULTIVARS OF WHEAT
HERITABILITY AND NUMBER OF GENES CONTROLLING LEAF RUST RESISTANCE IN FOUR CULTIVARS OF WHEAT
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DOI：
10.1094/phyto-78-457
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发表时间：
1988-01-01
期刊：
影响因子：
3.2
通讯作者：
LINE R F
中科院分区：
文献类型：
--
作者：
BJARKO M E;LINE R F
以小麦（Triticum aestivum）的叶锈病抗性为指标，以慢锈病品种（Borah和Wampum）、高抗性品种（Wared）和易感品种（Twin）为研究对象，对小麦（Triticum aestivum）的叶锈病抗性遗传进行了评价。1984年对4个品种间所有可能的单杂交进行了亲本和F1、F2、回交群体的单株田间评价，1986年沿亲本对每个杂交进行了100个F3系和40 ~ 45个F5系的评价。在任何杂交的分离群体中都没有观察到离散的表型分类。定量分析表明，每个抗叶锈病品种至少含有2 ~ 3个抗叶锈病基因，且每个品种的抗叶锈病基因与其他两个品种不同。用3种方法估计，Wared抗叶锈病遗传力为0.74 ~ 0.92，Wampum为0.42 ~ 0.70，Borah为0.33 ~ 0.55。Borah和Wampum杂交的遗传率最低。
Inheritance of leaf rust (Puccinia recondia) resistance in wheat (Triticum aestivum) was evaluated in two slow leaf-rusting cultivars (Borah and Wampum), a highly resistant cultivar (Wared), and a susceptible cultivar (Twin) using area under the disease progress curve as a measure of leaf rust resistance. Parental and F1, F2, and backcross population of all possible single crosses between the four cultivars were evaluated in the field on a single plant basis in 1984, and 100 F3 lines and 40-45 F5 lines per cross were evaluated along the parents in 1986. No discrete phenotypic classes were observed in the segregating populations of any cross. Based on quantitative analyses, each resistant cultivar contained at least two to three genes for leaf rust resistance, and the genes in each cultivar were different from those in the other two cultivars. Heritability estimates for leaf rust resistance, using three methods, ranged from 0.74 to 0.92 for Wared 0.42 to 0.70 for Wampum, and 0.33 to 0.55 for Borah, when crossed with Twin. The cross between Borah and Wampum resulted in the lowest heritability estimates.