苦瓜种质资源耐冷性鉴定

Chilling Tolerance Evaluation of Bitter Gourd Germplasm

以148份苦瓜种质为试材,进行发芽期和苗期的耐冷性鉴定和评价,比较不同类型苦瓜种质的耐冷性和变异程度。结果表明:发芽期、苗期耐冷性达到3级的种质数分别为32份和48份,占供试样品的21.62%和32.43%;不同类型的苦瓜种质耐冷性差异不同,在发芽期各类型苦瓜种质的耐冷性差异较大,其中以果皮绿色种质、刺瘤种质和近圆型种质耐冷性较强;在苗期各类型苦瓜种质耐冷性差异较小,其中以果皮深绿色种质、刺瘤种质和近圆型种质耐冷性较强;苦瓜芽期和苗期耐冷性具有一定的相关性但并不一致;研究结果为苦瓜耐冷新品种的选育提供新的种质,并为开展苦瓜耐冷机制研究积累材料。

The chilling tolerance of 148 bitter gourd germplasm was evaluated and the chilling tolerance and coefficients of variation of different types were compared.The results showed that 32 and 48 gemplasm possess higher tolerance to chilling tolerance with grade 3 at germinating and seedling stage,accounting for 21.62% and 32.43%,respectively.The chilling tolerance was different among different type of bitter gourd germplasm.The green,stinging wart and nearly spherical germplasm had higher chilling tolerance at germinating stage.The dark green,stinging wart and nearly spherical germplasm had higher cold tolerance at seedling stage.The chilling tolerance of bitter gourd germplasm at germinating and seedling stage had certain correlation,but not consistent.The results could provide materials for chilling tolerance breeding and chilling tolerance mechanism research.