乌塌菜品种间营养器官结构差异及相关性评价

Assessment of vegetative organ structure difference and their correlations among cultivars of Brassica campesttris ssp.chinensis var.rosularis

关键词:  乌塌菜  营养器官  解剖结构  性状  相关性

Key words:  wuta cai(Brassica campesttris ssp.chinensis var.rosularis)  vegetative organ  anatomical structure  character  correlation

摘要:

对8个乌塌菜品种营养器官的解剖结构和主要农艺性状进行了观察、统计和分析。结果显示，8个乌塌菜品种叶角质膜厚度、同化组织比例和细胞间隙在品种间表现出差异性；叶柄维管束中导管数量和直径在品种间的变异较大（变异系数分别为33.9%和36.2%），而维管束数量和直径在品种间的变异较小（变异系数分别为23.8%和25.2%）。各品种农艺性状存在不同程度差异：单株叶片数和单株叶片重在品种间差异较大（变异系数分别为97.16%和71.30%）；最大叶片面积的变化较小（变异系数47.87%）。聚类分析结果表明，8个乌塌菜品种可分为三类，每类代表一定的品性。23个指标之间的相关性分析表明，极显著正相关的有10个，占指标对的3.95%，极显著负相关的有3个，占1.19%。根据相对输导率判断，W38的抗旱性最强，W11的抗旱性最弱。

Abstract:

Anatomical structure and main agronomic characters of eight cultivars in wuta cai(Brassica campesttris ssp.chinensis var.rosularis) were observed，counted and analysed. The results indicated that the thickness of cuticle and mesophyll tissue，and the size of intercellular space showed some differences among these cultivars. The numbers and diameters of vessel in the petioles had higher variation among the eight cultivars(with coefficient of variation 339% and 36.2%，respectively)，while the number of vascular bundle and their diameters were lower(with coefficient of variation 23.8% and 25.2%，respectively). There were distinct differences in number of leaves and weight of lamina per plan(with coefficient of variation 97.16% and 71.30%，respectively)，but the differences of the maximum spread width and weight per fresh plant were no evident(with coefficient of variation 47.87%). Eight cultivars were divided into three groups by cluster analysis at 6.87 of rescaled distance，which were W2 and W11，W23，W39，W56，W57 and W61，and W38，each group standed for a certain kind of cultivar character. Correlation analysis between 23 indices indicated that 10 index pairs were significant positive correlated and three of them were significant negative correlated，taking up 3.95% and 1.19% of total index pairs，respectively. Judging by integrated estimate，the cultivar W38 had the highest drought resistance and that of W11 was the lowest.