Phenotypic diversity of tetraploid wheat landraces from northern and north-central regions of Ethiopia
Phenotypic diversity of tetraploid wheat landraces from northern and north-central regions of Ethiopia
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DOI：
10.1111/j.1601-5223.1996.00165.x
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发表时间：
1996-01-01
期刊：
影响因子：
2.7
通讯作者：
Merker, A
中科院分区：
文献类型：
--
作者：
Bechere, E;Belay, G;Merker, A
以27个四倍体（2n=4x=28）小麦（Triticum turgidum L.）从埃塞俄比亚北部和中北部行政区收集了2876份地方品种，研究了11个表型性状的变异。利用性状内各表型类别的频率，采用Shannon-Weaver指数（H '）估计和分析四个地区和五个海拔梯度的多样性。多数性状为多态性。然而，单态性是常见的，在许多人口密集的穗，长喙，无毛颖。在性状上，种子颜色、种子形状和颖壳短柔毛的平均多样性指数最高（H '分别为0.99、0.96和0.88）。穗密度对指数的贡献最小（H '= 0.24）。然而，这是唯一显示出显著差异的特征（p
Twenty-seven tetraploid (2n=4x=28) wheat (Triticum turgidum L.) landrace populations consisting of 2876 entries collected from the north and north-central administrative regions of Ethiopia were studied for variation of eleven phenotypic characters that have two or more classes. Using the frequencies of each phenotypic class within a character, the Shannon-Weaver index (H') was employed to estimate and analyse the diversity on the basis of Four regions and five altitudinal gradients. Most traits were polymorphic. However, monomorphism was common in many of the populations for dense spike, long beak, and glabrous glume. On character basis, seed colour, seed shape, and glume pubescence contributed the highest mean diversity indices (H'=0.99, 0.96, and 0.88, respectively). Spike density contributed the lowest index (H'=0.24). However, it was the only trait that displayed significant differences (p