Phenetic characterization of Citrullus spp. (Cucurbitaceae) and differentiation of egusi-type (C-mucosospermus)
Phenetic characterization of Citrullus spp. (Cucurbitaceae) and differentiation of egusi-type (C-mucosospermus)
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DOI：
10.1007/s10722-015-0220-z
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发表时间：
2015-12-01
影响因子：
2
通讯作者：
Blattner, Frank R.
中科院分区：
文献类型：
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作者：
Achigan-Dako, Enoch G.;Avohou, Edgar S.;Blattner, Frank R.
西瓜属的育种。由于各种好处不断引起人们的兴趣，特别是对具有重要经济意义的作物。然而，该属内的种间变异在许多方面仍然模糊，类群和亚类群的众多名称也让西瓜属育种者感到困惑。在缺乏明确的分类学分化的情况下，表型的分子分析直到最近才有助于理解该属的复杂性。在这项研究中，我们在连续两年在两个地点进行的田间试验中使用 22 个农业形态描述符对世界范围内的 213 个种质进行了表型表征。多变量分析证实了西瓜属的高度形态变异。并强调 C. mucosospermus 作为与其他西瓜属物种分离的同质群体。 egusi 型甜瓜的这种分化将有助于利用育种和保护目的，因为 C. lanatus 代表了世界上非常重要的经济作物。根据我们的发现，我们得出结论，我们对遗传变异和表型性状之间的关系以及西瓜属之间和内部形态变异的决定论的了解需要进一步加深。
Breeding of Citrullus spp. for various benefits has continuously raised interest particularly for economically important crops. However, the interspecific variations within the genus have remained obscure in many regards and the multitude of names for taxa and subtaxa eludes Citrullus breeders. In the absence of clear taxonomic differentiation, molecular analysis of phenotypes did not help understand the complexity of this genus until recently. In this study we carried out a phenetic characterization of a world collection of 213 accessions using 22 agro-morphological descriptors in field trials conducted in two locations and during two consecutive years. Multivariate analyses confirmed high morphological variation in Citrullus spp. and highlight C. mucosospermus as a homogenous group separated from other Citrullus species. This differentiation of egusi-type melon will help leverage breeding and conservation purposes as C. lanatus represent very important economic crops in the world. Based on our findings we conclude that our knowledge of the relationships between genetic variations and phenotypic traits and the determinism of morphological variations among and within Citrullus need to be further deepened.