Field evaluation for resistance to the black rot pathogen Xanthomonas campestris pv. campestris in cabbage (Brassica oleracea)
Field evaluation for resistance to the black rot pathogen Xanthomonas campestris pv. campestris in cabbage (Brassica oleracea)
复制标题
DOI：
10.1007/s10658-005-2799-y
复制
发表时间：
2005-11-01
影响因子：
1.8
通讯作者：
Andersen, SB
中科院分区：
文献类型：
--
作者：
Jensen, BD;Massomo, SMS;Andersen, SB
黑腐病由野油菜黄单胞菌致病变种Xanthomonascampestris pv.十字花科蔬菜（Cruciferus campestris，Xcc）病害是世界范围内十字花科蔬菜最严重的病害之一。49个基因型进行了评估，在坦桑尼亚的田间条件下，人工接种Xcc小种1。开放授粉的白色甘蓝品种普遍感病，而葡萄牙和尖白菜表现出部分抗性。部分F1白色甘蓝品种高度感病，而其他品种表现出较高的部分抗性。最有希望的杂交品种是T-689 F1、Gianty F1、No.9690 F1、N66 F1和SWR-02 F1。育种系Badger I-16在所有基因型中表现出最高的抗性水平。在叶片上评估的病害严重度的变异中，基因型占72.9-75.5%，在收获时评估的内部黑腐病的变异中占71.4%。高相关性（等于或大于0.7）之间的疾病严重程度评估叶在生长季节，也与头部的内部黑腐病的量。叶片损失也与疾病的严重程度。该性状的高度遗传决定和疾病评估之间的高度相关性表明，进行田间筛选时，选择抗黑腐病将是有效的。在生长季节对叶片上的病害严重程度进行基因型评估，结合最有希望的基因型中的穗部抗性评估，可能是选择抗性品种的简单方法。
Black rot, caused by Xanthomonas campestris pv. campestris, (Xcc), is one of the most serious diseases of crucifers world-wide. Forty-nine genotypes were evaluated for resistance under field conditions in Tanzania after artificial inoculation with Xcc race 1. Open pollinated white cabbage cultivars were generally susceptible, while Portuguese and pointed cabbages exhibited partial resistance. Some F1 white cabbage cultivars were highly susceptible, whereas others exhibited a high level of partial resistance. The most promising of the hybrid cultivars were T-689 F1, Gianty F1, No. 9690 F1, N 66 F1, and SWR-02 F1. Breeding line Badger I-16 exhibited the highest level of resistance of all genotypes. The genotypes accounted for 72.9-75.5% of the variation of the disease severity when assessed on the leaves, and 71.4% of the variation when assessed as internal black rot in heads at harvest. High correlations (equal to or above 0.7) were found between disease severities assessed on leaves three times during the growing season and also with the amount of internal black rot in heads. Leaf loss also was correlated with disease severity. The high genetic determination of the trait and the high correlations between disease assessments indicate that selection for resistance to black rot will be efficient when field screenings are carried out. Evaluation of genotypes for disease severity on leaves during the growing season combined with evaluations of head resistance in the most promising genotypes may be a simple method to select resistant cultivars.