组培条件下中国南瓜杂交种耐盐材料的筛选

在组培条件下以69份中国南瓜(Cucurbita moschataDuch.)杂交种和4份商品种为试验材料,研究中国南瓜杂交种的耐盐状况,确定筛选耐盐材料的适当NaCl浓度。结果表明,中国南瓜杂交种在不同NaCl浓度处理下存在明显的耐盐性差异,69份杂交种在120mmol/L NaCl浓度处理下的盐胁迫指数介于29.94～100之间,呈正态分布,有6份杂交种表现出较高的耐盐性,其中360-3×112-2杂交种最耐盐。认为在组培条件下采用120mmol/LNaCl浓度处理中国南瓜幼苗是一种有效筛选耐盐材料的方法。

SELECTION OF SALT-TOLERANT MATERIALS OF PUMPKIN HYBRIDS in vitro

69 hybrids and 4 commercial varieties of pumpkin(Cucurbita moschata Duch.) were used for the study of salt-tolerance.NaCl concentration for selecting salt-tolerant material in vitro was determinated.The results showed that there were significant differences in salt tolerance among 10 tested materials with 6 salinities(0,40,80,120,160,200 mmol/L).The salt stress index(SSI)of seedlings of 69 pumpkin hybrids ranged from 29.94 to 100,and the frequency distribution was normal by normal test.6 salt-tolerant hybrids were obtained,among the hybrid "360-3×112-2" showed the strongest salt tolerance.120 mmol/L NaCl was determined as an effective concentration to select salt-tolerant materials from pumpkin hybrid seedlings.