摘要
鸭茅(Dactylis glomerata)是在世界范围内广泛栽培种植的一种重要禾本科牧草,具有高产、优质、抗逆性较强等特点。本研究对16份国外引进的鸭茅品种及种质材料的物候期和表型性状进行观测分析,以期为不同倍性鸭茅材料的遗传学分析与选育利用提供资料。根据各参试材料已有的染色体倍数信息,初步分析发现参试的四倍体材料的生育期普遍比二倍体材料要短。观测的14项指标中,种子千粒重、花序宽度、旗叶长度、叶片长度和节间长度等性状变异范围较大,变异系数大于20%。种子长度和种子宽度变异最小。除不能完成全生育期的PI237601之外,其余15份材料可划分为4类,其中3个二倍体鸭茅种质材料聚为一类,与其他四倍体材料存在明显差异。
Cooksfoot（Dactylis glomerata） is an important forage grass and is widely cultivated in the world due to high forage yield,good quality,and stresses tolerance.The objectives of this study were to collect the necessary data on morphological and phonological traits in order to engage in genetic analysis and breeding program in cooksfoot materials with various chromosome ploidy levels.This study indicated that the growth period of tetraploid accessions was shorter than that of diploid accessions.Among 14 morphological traits,the thousand seed weight,width of inflorescence,length of flag leaf,length of leaf and length of internode showed the relatively high variations among 16 accessions with over 20% of coefficient of variation.The width and length of seed showed a low variation.Exception of PI237601,which would not produce seed in Beijing,other 15 accessions could be classified into 4 groups,indicating all three diploid accessions were in a group,and these diploid accessions were obvious difference with tetraploid accessions.
出处
《草业科学》
CAS
CSCD
北大核心
2011年第4期597-602,共6页
Pratacultural Science
基金
牧草倍性育种技术研究(2008BADB3B03)
关键词
鸭茅
种质
物候期
形态性状
评价
cooksfoot
germplasm
phenological phase
morphological traits
evaluation
