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植物学报 >

2010 , Vol. 45 >Issue 02: 162 - 173

DOI: https://doi.org/10.3969/j.issn.1674-3466.2010.02.004

研究报告

油菜基因流网络的结构特性与小团体分析

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  • 1中南大学资源与安全工程学院, 长沙 4100832华南理工大学生物科学与工程学院, 广州 5100063湖南农业大学植物科技学院, 长沙 410128

收稿日期: 2009-05-27

  修回日期: 2009-09-20

  网络出版日期: 2010-03-01

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Structural Characteristics and Subgroup of Rapeseed Gene-flow Network

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  • 1Central South University, Changsha 410083, China
    2South China University of Technology, Guangzhou 510006, China
    3Hunan Agriculture University, Changsha 410128, China

Received date: 2009-05-27

  Revised date: 2009-09-20

  Online published: 2010-03-01

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摘要

为从系统角度掌握转基因油菜(Brassica campestris)基因流规律, 基于常规油菜与十字花科植物杂交的有关文献,构建了油菜基因流网络拓扑图实例并分析其网络结构特性。研究结果表明, 该网络节点度服从幂律分布, 具有无标度特性。从随机攻击和恶性攻击两个方面对标准结构熵和网络效率2个指标的网络稳健性进行分析, 结果显示在随机移除不到10%的顶点时网络表现较好的鲁棒性, 但在受到选择性移除10%的顶点时, 网络具有极弱的抗攻击性。基于软件UCINET对网络进行了小团体和结构同型性分析, 可将网络中298个节点22类十字花科植物划分为2个小团体和5类结构角色, 其中甘蓝型油菜在基因流网络小团体中具有关键性作用。这些研究结果可为揭示转基因油菜基因流规律提供新思路, 同时也可对转基因油菜商业化种植采取合理的农业生产栽培管理措施提供参考。

本文引用格式

廖慧敏*;吴超;曹以诚;高强;王国槐 . 油菜基因流网络的结构特性与小团体分析[J]. 植物学报, 2010 , 45(02) : 162 -173 . DOI: 10.3969/j.issn.1674-3466.2010.02.004

Abstract

To understand the gene-flow rules of transgenic rapeseed, we first constructed a rapeseed gene-flow topological graph and analyzed its structural characteristics on the basis of data of normal rapeseed hybridization with Cruciferae. The node degree of the network follows the power-law distribution and has scale-free properties. Then, using the 2 indices of standard structure entropy and network efficiency, we analyzed the network robustness according to random attacks and intentional attacks. The gene-flow network is robust against random failures of nodes but fragile to intentional attacks with removal of no more than 10% nodes. Finally, we analyzed the subgroup and structural position by the UCINET software and found 298 nodes, namely 22 kinds of Cruciferae plants, divided into 2 subgroups and 5 structural positions; Brassica napus played a key role in subgroups and structural position. These results provide a new approach for transgenic rapeseed gene-flow research and gives some references for reasonable cultivation measures of transgenic rapeseed.
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