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首页> 外文期刊>Genetic Resources and Crop Evolution >Morphological variability in 17 wild elephant foot yam (Amorphophallus paeoniifolius) collections from southwest India
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Morphological variability in 17 wild elephant foot yam (Amorphophallus paeoniifolius) collections from southwest India

机译：印度西南部17种野生象脚山药（Amorphophallus paeoniifolius）集合的形态变异

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摘要

Amorphophallus paeoniifolius (Dennst.) Nicolson is a tuberous herb occurring in the wild and cultivated state. Vegetative morphological characters were studied at full foliage stage in 17 accessions of A. paeoniifolius which include two cultivars, 15 wild accessions and a related species, A. dubius Blume. The first principal component (PC) accounted for 42.32% of phenotypic variance followed by second for another 18.38%. Major traits that accounted for more variability in both PC1 and PC2 include offset shape, cormel weight per corm, corm fresh weight, petiole surface pattern and canopy spread. The unweighted pair-group method with mathematical averaging (UPGMA) clustering method revealed three principal clusters which separated all the accessions between Euclidean distances of 0.3-1.6. Both cluster analysis and principal co-ordinate analysis revealed T10, a morphotype of A. paeoniifolius var. campanulatus (Decne.) Sivad. cultivated in Tamil Nadu and P19 accession of A. paeoniifolius var. paeoniifolius from Karnataka as morphologically distinct, which needs further validation on the basis of floral characters or molecular markers and G3 from Gujarat as an immediate ancestor of cultivated elephant foot yam. The genotypic (GCV) and phenotypic (PCV) coefficients of variation, broad sense heritability (h(2)B) and genetic advance (GA) as a percent of the mean assessed for 18 accessions revealed high heritability estimates. A highly significant (P < 0.01) correlation coefficient between circumference of petiole base and corm diameter, corm height, corm weight, east west spread and north south spread suggests that circumference of petiole and canopy spread are indicators to corm weight and size.
机译：Amorphophallus paeoniifolius（Dennst。）Nicolson是一种块状草本植物，存在于野生和栽培状态。研究了17种access药植物在全叶期的营养形态特征，其中包括两个品种，15个野生种和相关种杜比布鲁姆。第一个主成分（PC）占表型方差的42.32％，其次是另一个18.38％。造成PC1和PC2变异性更大的主要特征包括偏移形状，每球茎的cormel重量，球茎鲜重，叶柄表面图案和冠层传播。采用数学平均的非加权成对组（UPGMA）聚类方法显示了三个主要聚类，它们将所有欧几里德距离之间的所有元素分开，范围为0.3-1.6。聚类分析和主坐标分析均显示了T10，即A. paeoniifolius var的一种形态。 campanulatus（Decne。）西瓦德。在泰米尔纳德邦种植，A。paeoniifolius var P19入种。来自卡纳塔克邦的paeoniifolius在形态上截然不同，需要根据花卉特征或分子标记和古吉拉特邦的G3（作为栽培象脚山药的直接祖先）进行进一步验证。基因型（GCV）和表型（PCV）的变异系数，广义遗传力（h（2）B）和遗传进步（GA）占18个种质评估平均值的百分比，显示出较高的遗传力估计值。叶柄基部周长与球茎直径，球茎高度，球茎重，东西向传播和南北传播之间的极显着（P <0.01）相关系数表明，叶柄的周长和冠层传播是指示球茎重量和大小的指标。

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