‘乐亭白黄瓜’主要性状混杂度分析

The Variability of Main Agronomic Traits in‘Laoting White Cucumber'

‘乐亭白黄瓜’是河北乐亭县目光温室越冬茬旱黄瓜基地主栽的农家品种，由于缺乏系统选育，品种性状混杂，制约了当地旱黄瓜产业健康发展。现以‘乐亭白黄瓜’为试材，在春季日光温室栽培条件下，对该原始群体的生长势、早熟性、产量和品质等性状进行了调查分析。结果表明：‘乐亭白黄瓜’栽培群体的植株分枝少，但株高和节间长度分离较严重，变异系数分别为33．7％和20．9％。第一雌花节位集中分布在第4～11节；20节内雌花节位数集中分布在2～4个，变异系数27．4％。初步鉴定单性结实力较弱。商品瓜棒状，瓜长度集中分布在20-25cm，变异系数15．1％；瓜皮色均匀一致的占25．7％。雌花花柄长度变异系数为45．0％。该研究结果为黄瓜新品种选育提供参考依据。

＇Laoting white cucumber＇ is the main local variety cultivated in winter solar greenhouse in Laoting, Hebei. A large degree of variability due to insufficient system selection has restrained the development of cucumber industry. Plant vigor, precocity, fruit yield and quality of ＇Laoting white cucumber were investigated in a solar greenhouse in spring. The results showed that the plants were less branching but the coefficient of variability （CV） of plant height and internode length was 33. 7% and 20. 9% ,respectively. The first pistillate flower bearing node was concentrated 4-11. The number of female flower nodes within 20 nodes was concentrated from 2 to 4,and the CV was 27. 4%. The parthenocarpy was weak. The marketable fruit was club-shaped and the fruit length was concentrated at 20-25 cm. The percentage of fruit with uniform basal color was 25.7 %. The CV of pedicel length of female flowers was 45. 0 %. These data could be helpful for the selection of elite cucumber cultivars.