%0 Journal Article
%T Monitoring genetic dynamics of Caribbean pine populations under different environments and management activities using genetic markers<br>用遗传标记监测不同环境和经营措施下的加勒比松森林群体遗传动态
%A ZHENG Yong Qi
%A <br>郑勇奇
%J 生态学报
%D 2001
%I 
%X Isozyme analysis of seeds collected from natural and managed populations of the tropical pine, Pinus caribaea var caribaea , was used to assess mating systems and population genetic structure By comparing the genetic parameters of the managed with the natural populations, possible impacts of changed growing condition on population genetic dynamics were detected Six populations (consisting of 3 natural populations, 1 managed seed stand and 1 clonal seed orchard in Cuba and 1 plantation population in China) were assayed with 5 enzyme systems and 8 loci In all populations except the over logged island population, both single and multi locus outcrossing rates did not significantly differ from the complete outcross ( t =1) The multi locus outcrossing rate and half of the single locus outcrossing rates of the over logged island population were smaller than the complete outcross Both the average single locus outcrossing rate and the multi locus estimate were significantly smaller than that of the other three populations Isozyme variation and gene diversity of the over logged population were found similar to that of the natural population JAG, but lower than of the other populations The inbreeding coefficient in the over logged population was larger than in other populations except the two populations of MAN and Chinese plantation The population of the Chinese plantation was exceptionally different from the Cuban populations by displaying significantly larger isozyme variation and gene diversity The genetic distances between the Chinese population and the Cuban populations were significantly larger than that among the Cuban populations Results indicated that over logging caused the increase of inbreeding and that establishment of well designed seed orchard can effectively reduce inbreeding Given the changed growing condition and closely related neighboring species, the population of the Chinese plantation may have undergone several possible processes, such as bulking of seeds of different taxa or hybridization with related species (varieties)
%K genetic dynamics
%K mating system
%K genetic structure
%K genetic marker
%K outcrossing rate<br>遗传动态
%K 交配系统
%K 遗传结构
%K 遗传标记
%K 异交率
%K 加勒比松
%K 森林
%K 群体遗传
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=2AF0DED6CB2D381C&yid=14E7EF987E4155E6&vid=659D3B06EBF534A7&iid=38B194292C032A66&sid=A04F01817ECB9A48&eid=EA64BD0B2FF6E786&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=19