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首页> 外文期刊>Biology Bulletin Reviews >Biochemical Specialization and Evolution in the Triticeae Dum. Tribe (Poaceae)
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Biochemical Specialization and Evolution in the Triticeae Dum. Tribe (Poaceae)

机译：小麦的生化专业化和进化。部落（禾本科）

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摘要

The problems of evolution and specialization of the tribe Triticeae are considered from the standpoint of the evolution of a seed protein complex and amino acid composition. The potential for using biochemical indices for the assessment of advances inthe evolution and specialization of grasses are discussed.The degree of specialization was assessed for 98 taxa of the tribe Triticeae using the index of remoteness from a hypothetic ancestor of grasses (IR). Within the Poaceae family, Triticeae is shown to be a tribe with an extremely high level of specialization. Henrardia and Leymus are distinguished as the most specialized genera in the tribe. Species and genera of the tribe—second diploids—were first found to be characterized by a lower IR as compared to donors of simple genomes. This fact is interpreted as a reflection of the biochemical despecialization of the taxon. The extremely low specialization of Pascopyrum smithii (IR 19.0) can be regarded as a demonstration of the highest degree of the despecialization in tribe.
机译：从种子蛋白复合物和氨基酸组成的进化的角度考虑了小麦黑麦草的进化和专业化问题。讨论了利用生化指标评估草的进化和专业化的潜力。利用假想草的远缘指数（IR）评估了98个黑麦部落分类群的专业化程度。在禾本科（Poaceae）家族中，小麦属被证明是具有极高专业化水平的部落。 Henrardia和Leymus被认为是该部落中最专业的属。首先发现该部落的物种和属（第二二倍体）的特征在于其IR比简单基因组的捐赠者低。该事实被解释为分类单元的生化去专业化的反映。史密斯氏菌（Pascopyrum smithii）的极低专业化水平（IR 19.0）可以看作是部落非专业化程度最高的例证。

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