茄子砧木对南方根结线虫抗性的鉴定与评价

为确定茄子砧木抗南方根结线虫的水平及其鉴定评价方法，以11份茄子砧木为试材，采用盆栽幼苗人工接种方法，测定了南方根结线虫对幼苗各器官相对生长量及相关抗性指标的影响，并进行了聚类分析及隶属函数分析。结果表明，南方根结线虫侵染引发的幼苗不同器官的相对生长量、不同抗性指标及其变异系数不同。利用变异系数较大的根结指数进行聚类分析结果与4个抗性指标综合分析结果完全一致，但与利用5个相对生长量指标及相对根系鲜质量聚类结果存在些微差异。通过综合鉴定评价，将供试茄子砧木材料分为抗病、耐病、中感、高感4个类群，其抗（耐）病能力强弱依次为：托鲁巴姆、托托斯加、圣托斯、刺茄、北农茄砧、台茄、刚果茄、赤茄、耐病VF、香瓜茄、琼野茄。

Screening and Evaluation of Eggplant Rootstock for Resistance to Meloidogyne incognita

In order to define the screening method and the resistance to Meloidogyne incognita, the relative growth indexes and relevant resistant indexes of 11 eggplant rootstock seedlings which were planted in pots and inoculated with Meloidogyne incognita were measured in the experiment, and the clustering analysis and subordinate function analysis with different indexes were conducted. The results showed that the different relative growth indexes of different organs, different resistant indexes of eggplant rootstock seedlings and their coefficient variances resulted from the infection of Meloidogyne incognita were different. The result of clustering analysis with gall index which coefficient variance was higher was quite same to that with four resistant indexes, but there was a little difference with that of clustering analysis with five relative growth indexes and relative root fresh weight. According to comprehensive screening and evaluation, the eggplant rootstocks in the experiment could be clustered 4 groups, i.e. high resistance, endurance, moderate susceptibility and high susceptibility. The sequence of resistance (or tolerance) from strong to weak successively was: Solanum torvum, Tuotuosijia, Shengtuosi, Solanum surattense, Beinongqiezhen, Solanum daidaro, Solanum sisybriiflium, Solanum integriflium, Taibyo VF, Solanum muricatum,Qiongyeqie.