摘要
本研究选取相对总二级分枝个数比、相对总茎长比、叶片枯黄率、坪用质量、相对地上部干质量比和相对地下部干质量比6个指标,对不同地理分布的19份地毯草(Axonopus compressus)种质和1份品种的耐铝性差异进行初步评价,从而明确地毯草种质的耐铝性。结果表明,在2.10mmol.L-1的铝处理后,不同种质之间的生长存在显著(P<0.05)或极显著(P<0.01)差异,不同指标间的变异系数范围为18.73%~39.63%,其中相对地上部干质量变异系数比最小(18.73%),而坪用质量最大(39.63%);部分指标间存在极显著相关(P<0.01),相关系数最高达-0.920;聚类分析表明,20份优良品种被分为三大类,即耐铝型、中间型和敏铝型。
In order to explore aluminum tolerance of Axonopus compressus eultivars, 6 traits (total number of secondary branches, total stem length, leaf firing percentage, turf quality, relative shoot dry weight and relative root dry weight) of 19 different geographical distribution of A. compressus germplasm and one cultivar were measured in the study. The results showed that there were significant (P〈0.05) or very sig- nificant (P〈0.01) difference among different germplasm on 2.1 mmol ·L^-1 aluminum treatment. Coeffi- cient of variation of different indicators ranged from 18.73% to 39.63 %, of which the relative shoot dry weight (18.73%) was minimum and turf quality (39. 63%) maximum. There were significant correlations (maximal correlation coefficient of -0. 920)among different indexes of A. compressus germplasm. Based on six traits, SPSS 16.0 was used to divide carpet grass germplasm into three aluminum tolerance types. aluminum tolerance, intermediate and aluminum-sensitive.
出处
《草业科学》
CAS
CSCD
北大核心
2012年第11期1671-1677,共7页
Pratacultural Science
基金
国家自然科学基金项目(31060266)
海南省自然科学基金项目(310031)
海南大学作物省级重点项目
海南大学热带作物种质资源保护与开发利用教育部重点实验室课题项目(2010hckled-02)
海南大学博士启动基金(KYCD1111)
关键词
地毯草
坪用质量
耐铝
种质
聚类
相关性
Axonopus compressus
turf quality
aluminum tolerance
germplasm resource
cluster
correlation