葫芦科蔬菜种质资源对南方根结线虫的抗性评价

Evaluation on Resistance of Cucurbitaceae Germplasm Resources to Root-knot Nematode

根据不同种质的来源地、农艺性状等背景信息，从国家蔬菜种质资源中期库中选取具代表性的444份主要瓜类作物地方品种，分属葫芦科7个属的13个种或变种，采用病土接种法进行苗期根结线虫抗性鉴定，得出了不同葫芦科作物对南方根结线虫的抗性分布范围。忽略基因型差异，不同作物的平均病级指数从小到大的顺序为：冬瓜、西瓜、丝瓜、节瓜、苦瓜、越瓜、甜瓜、菜瓜、瓠瓜、黄瓜、中国南瓜、印度南瓜、美洲南瓜。通过抗性鉴定，共获得27份抗根结线虫种质（病级指数1-2），包括12份冬瓜、3份苦瓜、7份丝瓜和5份西瓜。

According to the basic information such as origin, agricultural characters of different germplasm, 444 representative domestic cultivars, belonging to 13 species or varieties, 7 genus of cucurbitaceae respectively, were selected as experimental materials to identify their resistance to root-knot nematode using the inoculation method of infected soil. Results showed the resistance distribution of different cucurbit crops. Omitting the discrepancy of different genotype, the average disease indexes in the same crop were in turn of wax gourd, watermelon, towel gourd, chieh qua, balsam pear, oriental pickling melon, melon, bottle gourd, cucumber, pumpkin, winter squash, summer squash. Through identification, 27 accessions of germplasm with resistance to root-knot nematode were obtained, including 12 accessions of wax gourd, 3 accessions of balsam pear, 7 accessions of towel gourd and 5 accessions of watermelon.