Variation and association analyses on morphological characters of linseed ( Linum usitatissimum L.) in Ethiopia

Sinet, Ethiopian Journal of Science Pub Date : 2006-04-12 DOI:10.4314/SINET.V28I2.18249

Worku Negash, Zemede Asfaw Z. Asfaw, Haile S. Yibrah

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引用次数: 11

Abstract

Morphological studies of linseed ( Linum usitatissimum L.) of Ethiopia were undertaken in this study on 56 accessions collected from 10 administrative regions (former regions) classified into seven altitude classes. The seeds were planted during 2001 growing season in Bale-Goro wereda using randomized complete block design (RCBD) on three replications with the aim of investigating the morphological diversity in the accessions. Over the entire accession, except seed number per boll, all the characters showed significant variation. However, regional groups of linseed accessions showed insignificant variations only for secondary branches number per plant (SBP), days to flowering (DTF) and days to maturity (DTM) among themselves, and altitudinal groups of linseed accessions only for seed number per boll (SNB) and days to flowering (DTF). The analysis for coefficient of variation and cluster analysis showed that accessions from Gojam and Tigray were less diversified. About 53% of the total associations showed significant correlation and out of this 71% of the correlations were with the positive significant correlation coefficients. Cluster analysis indicates that accessions collected from the two extremes of altitude classes have variations for the studied traits. It is only Tigray Region that did not contribute member accession to cluster III, whereas Gondar and Bale regions contribute member accessions to 80% of clusters. Factor analysis showed that of the total variation (73.86%) 30.04% and 27.29% were accounted for by first and second principal components, respectively. The highest Shannon diversity index (0.322 ± 0.039) was recorded for boll size and Shannon diversity index for overall pooled mean was 0.223 ± 0.063. Keywords : cluster/factor analysis, diversity index, linseed accessions, morphological characters, variation/association SINET: Ethiopian Journal of Science Vol. 28(2) 2005: 129-140

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埃塞俄比亚亚麻籽(Linum usitatissimum L.)形态性状变异及关联分析

对埃塞俄比亚10个行政区域(原区域)的56份亚麻种子(Linum usitatissimum L.)进行了形态研究。采用随机完全区组设计(RCBD)，于2001年生长季在Bale-Goro wereda进行3个重复的种子种植，目的是研究其形态多样性。在整个生育期，除单株种子数外，其余性状均有显著差异。各区域间仅单株次枝数(SBP)、开花天数(DTF)和成熟期(DTM)差异不显著，各海拔间仅单铃种子数(SNB)和开花天数(DTF)差异不显著。变异系数分析和聚类分析表明，戈贾姆和提格雷品种多样性较低。约53%的关联显示出显著相关，其中71%的相关系数为正显著相关。聚类分析表明，两个极端海拔等级的材料在性状上存在差异。只有提格雷地区没有贡献成员加入第三集群，而贡达尔和贝尔地区贡献了80%集群的成员加入。因子分析表明，第一主成分和第二主成分分别占总变异量的30.04%和27.29%，占总变异量的73.86%。铃大小的Shannon多样性指数最高，为0.322±0.039，综合平均值的Shannon多样性指数最高，为0.223±0.063。关键词:聚类/因子分析，多样性指数，亚麻籽材料，形态特征，变异/关联[j] .中国农业科学，Vol. 28(2)， 2005: 129-140

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Sinet, Ethiopian Journal of Science

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