| 木兰门作物RubisCO大亚基的分子适应性进化研究 |
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| 引用本文： | 刘晗,王丽坤,熊冬金.木兰门作物RubisCO大亚基的分子适应性进化研究[J].农业科学与技术,2009,10(4):8-11,18. |
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| 作者姓名： | 刘晗 王丽坤 熊冬金 |
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| 作者单位： | 南昌大学生命科学与食品工程学院,江西南昌,330031 |
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| 摘 要： | 分子进化中发生正选择的一个标志是密码子的错义替换（dN，氨基酸替代）比同义替换（dS，氨基酸不变）有更高的替换速率，计算dN与dS之比ω能衡量蛋白质的进化趋势和所受到进化压力的大小。ω=1、〈1和〉1分别说明蛋白质在进化过程中受到中性选择、负选择和正选择。
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| 关 键 词： | 适应性进化 分子进化 RubisCO 大亚基 作物 木兰 进化趋势 进化过程 |
Adaptive Evolution of Large Subunits of RubisCO in Magnoliophyta Crops |
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| LIU Han,WANG Li-kun,XIONG Dong-jin.Adaptive Evolution of Large Subunits of RubisCO in Magnoliophyta Crops[J].Agricultural Science ＆ Technology,2009,10(4):8-11,18. |
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| Authors: | LIU Han WANG Li-kun XIONG Dong-jin |
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| Institution: | ( College of Life Sciences and Food Engineering, Nanchang University, Nanchang 330031) |
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| Abstract: | Objective] The aim was to study adaptive evolution of the large subunits of RubisCO in Magnoliophyta crops. Method] Taking Magnoliophyta crops such as corn and rice as research materials, the analysis on molecular adaptive evolution was carded out by using codon replacement and maximum likelihood methods. Result] The RubisCO suffered positive selection effect and six amino acid sites were identified. Conclusion] The six amino acid sites are of important guiding significance for studying catalytic activity of RubisCO large subunits and crop improvement. |
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| Keywords: | Magnoliophyta crops Ribulose-1 5-biphosphate carboxylase/oxgenase rbcL gene Positive selection |
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