NaCl胁迫下苜蓿发芽期性状的相关性研究  

Correlative Study of Characters of Alfalfa in Germination Period under the Salt Stress

作　　者：高建明[1] 桂枝[1] 袁庆华[2] 高俊杰[1] 丛琳[1] 

机构地区：[1]天津农学院农学系,天津300384 [2]中国农业科学研究院北京畜牧兽医研究所,北京100094

出　　处：《北方园艺》2010年第4期1-4,共4页Northern Horticulture

基　　金：农业部科技计划资助项目(07-1);天津农学院科学研究发展基金资助项目(D2008-002)

摘　　要：试验选用20个不同起源的苜蓿品种,采用完全随机设计,研究了NaCl胁迫下苜蓿发芽期苗重、胚芽重、胚根重、苗长、胚芽长、胚根长、发芽率及发芽势共8个性状间的相关性。结果表明:按8个性状间的相关性,可将其分为3类,即发芽率性状(发芽率和发芽势)、重量性状(苗重、胚芽重和胚根重)及长度性状(苗长、胚芽长和胚根长)。其中,3类性状内部的各性状间大都存在较强的相关性;而在3类指标之间,仅有胚根重与根长和苗长存在相关性。因此,任何一类(或一个)性状都不能全面反映盐胁迫下苜蓿发芽期生长情況,考虑到8个性状间的相关性和大批量筛选耐盐材料时试验操作的繁简程度,选择发芽率、苗重和苗长作为评价指标较为合适。Using a completely randomized block design, 20 alfalfa varieties which had different origin were selected to study the correlations among 8 characters of germination period under the treatments with the different salt stress. These 8 characters included germination, germinating energy, seedling weight, shoot weight, root weight, seedling length, shoot length and root length. The results showed that 8 characters could be classified to 3 groups： the germination character （germination and germinating energy）, the weight character（seedling weight, shoot weight and root weight）, and the length character （seedling length, shoot length and root length）. A great correlation was usually found between character pair belonged to the same group whereas among characters from the different groups, only two pairs, root weight / root length and root weight/seedling length, showed correlations. In conclusion, any group or any characters can not represent the geminating situation of alfalfa seeds under the salt stress. Considering the correlations among 8 characters revealed by the study and the simplification of work, 3 characters, including germination, seedling weight and seedling length, are a good combination to be used to evaluate the resistance of alfalfa to salt in germination period.

关 键 词：苜蓿 氯化钠 发芽期 性状 相关性 

分 类 号：S511.7[农业科学—作物学]