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首页> 外文期刊>Genetic Resources and Crop Evolution >Characterization and taxonomical note about Thai Erianthus germplasm collection: the morphology, flowering phenology and biogeography among E. procerus and three types of E. arundinaceus
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Characterization and taxonomical note about Thai Erianthus germplasm collection: the morphology, flowering phenology and biogeography among E. procerus and three types of E. arundinaceus

机译：泰国Erianthus种质集合的特征和分类学注释：pro。procerus和三种E. arundinaceus的形态，开花物候和生物地理学

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摘要

, one of the genus in complex, is important genetic resources for sugarcane improvement. The morphology and flowering phenology of 108 accessions belonging to and three types of collected from throughout Thailand were compared. PCA analysis based on 22 characteristics clearly supported the separation of Type II and Type III of from and Type I of according to their morphological characteristics, particularly their bud size, and the development of root primordia, which greatly affected axis I of the PCA analysis. and Type I showed overlapping in many of their characteristics including their flowering periods. Flower characteristics such as rachis joint length, which were used for previous taxonomic classifications, were not available for the classification of the Thai samples because of the wide variation and overlapping among them. Most of these phenotype similarities and differences are considered to have developed convergently as a result of niche adaptation. Type II and III inhabit riverbanks and streambeds where floods occur frequently, while and Type I mainly grow in non-flooding areas such as mountainous grassland, the edge of forests, and beside fields. All Thai show unique geographic distributions in Thailand. In particular, the biogeographic boundary between Type II and Type III appeared to be located at the Isthmus of Kra. Although some types showed morphological similarities, reproductive isolation among the four groups seemed to be maintained by differentiation in geographic distribution, habitat preference, and flowering timing.
机译：甘蔗属之一，是改善甘蔗的重要遗传资源。比较了来自泰国各地的108种和3种收集物的形态和开花物候。基于22个特征的PCA分析清楚地支持根据II型和II型的形态特征（尤其是芽的大小）和根原基的发育对I型和I型分离，这极大地影响了PCA分析的I轴。 I型和I型在包括开花期在内的许多特性上都表现出重叠。以前的分类学分类所使用的花朵特征（如花chi节长）由于其差异很大且重叠而无法用于泰国样品的分类。这些表型的相似性和差异中的大多数被认为是由于利基适应而逐渐发展的。 II型和III型居住在经常发生洪水的河岸和河床，而I型则主要生长在非洪水地区，例如山区草地，森林边缘和田野旁。所有泰国人在泰国都表现出独特的地理分布。特别是，II型和III型之间的生物地理边界似乎位于Kra地峡。尽管某些类型表现出形态上的相似性，但似乎通过地理分布，生境偏好和开花时间的差异来维持这四个群体之间的生殖隔离。

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