| 摘要: |
| 从形态和生理等水平对乌塌菜耐寒特性进行研究，探究各耐寒指标之间的关系，为乌塌菜大规模品种耐寒性评价及耐寒新品种选育和推广奠定基础。以6份乌塌菜品种为试验材料，对部分幼苗在低温（0℃）胁迫5 d，测定叶片的电导率、叶绿素含量、丙二醛含量和可溶性糖含量，其余幼苗在大田栽培，待成熟时测定其12个形态特征，以各单项指标的耐寒系数作为衡量耐寒性的依据，运用主成分分析和隶属函数分析方法对其耐寒性进行综合评价。结果表明：低温条件下，不同乌塌菜品种叶绿素含量的变化与不同品种低温耐受性的相关性不显著，各品种可溶性糖含量都有所增加；通过主成分分析将19个单项指标转换为4个相互独立的综合指标，叶色、叶片面积、株型和紧实程度是反映乌塌菜主要的形态性状，电导率和丙二醛含量是反映乌塌菜耐寒性鉴定的主要指标。通过隶属函数值法分析将6份乌塌菜品种按耐寒性强弱划分为2类。叶色深、叶片面积小、株型小和紧实的品种耐寒性强；叶色浅、叶片面积大、株型大和松散的品种耐寒性弱。 |
| 关键词: 乌塌菜 耐寒性 生理特性 形态特征 |
| DOI：10.11841/j.issn.1007-4333.2014.04.14 |
| 投稿时间：2014-01-03 |
| 基金项目:安徽省高校自然科学基金项目（KJ2012A109） |
|
| Relationship of major morphological characteristics with low temperature tolerance in savoy |
|
SHAO Lu, WANG Cheng-gang, SONG Jiang-hua, ZHANG Hui, WANG Shuai-shuai, YANG Jing
|
| (Horticulture College, Anhui Agricultural University, Hefei 230036, China) |
| Abstract: |
| To evaluate the cold tolerance of savoy(Brassica campestris L.ssp.chinensis var.rosularis Tsen),physiological and morphological characteristics in savoy were studied under low temperature;the relationship between different indexes of cold tolerance were revealed,which would provide a theoretical basis for discovery and promotion of cold tolerant germplasm,evaluation on cold tolerance of a large number of savoy varieties and breeding of new cold-tolerant varieties.The cold resistance of 6 savoy varieties were test materials,the cold comprehensive evaluation of chilling tolerant coefficient (CTC) about relative electric conductivity,chlorophyll content,relative MDA content and relative soluble sugar content in leaves of savoy seedlings under low temperature stress (0℃,5 d)and the rest of the seedlings grown in field,waiting for mature determines their 12 morphological characteristics,were evaluated by principal components analysis and subordinate function analysis.During low temperature treatment,no significant correlation was found between pigments content with chilling tolerance of savoy various cultivars and soluble sugar content of each type were increased;the 19 single indexes could be classified into 4 independent comprehensive components.Leaf color,Leaf color,leaf area,plant type,degree of compaction were reflecting the main morphological characters of savoy;relative electric conductivity and relative MOD content reflected savoy cold tolerance identification of the main indicators.The subordinate function analysis was used to divide 6 savoy cultivars into three chilling-tolerance types.Leaf color depth,small size,small plant type,tight varieties of cold resistance was strong.Leaf color,leaf area,plant type,the variety of loose cold resistance was weak. |
| Key words: savoy cold resistance physiological property morphological characteristics |
