Statistical analysis on adaptive evolution of SQUA genes in angiosperms

SQUAMOSA (SQUA) subfamily includes important perianth identity genes of MADS-box gene family. SQUA genes of Dendrocalamus latiflorus were sequenced, and phylogenetic form on SQUA genes in angiosperms was analyzed. Relative rate and adaptive evolution after SQUA gene duplication in recent common ancestor of monocots and eudicots were analyzed using the methods of relative rate test, statistic on synonymous and non-synonymous coden substitution sites and likelihood rate test. The results show that both of relative rate and synonymous and non-synonymous coden substitution in eudicot clade are significantly higher than those in monocot clade, and the value of dN/ds uncovered possible positive selective pressure in eudicot clade.

作 者： CHEN Yongyan ZHONG Yang TIAN Bo YANG Ji LI Dezhu   作者單位： CHEN Yongyan(Laboratory of Plant Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204,China;College of Bioengineering, Dalian University, Dalian 116622, China)

ZHONG Yang(Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, School of Life Science, Fudan University, Shanghai 200433, China)

TIAN Bo,LI Dezhu(Laboratory of Plant Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204,China)

YANG Ji(College of Life Sciences, Peking University, Beijing 100871, China) 

刊 名： 自然科學進展（英文版）  SCI 英文刊名： PROGRESS IN NATURAL SCIENCE  年，卷(期)： 2005 15(1)  分類號： Q3  關鍵詞： angiosperms   Dendrocalamus latiflorus   SQUA gene   relative rate test   likelihood rate test   adaptive evolution  

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