昆虫同域物种形成机制及检验.pdfVIP

2009 46( 1) Chin s Bull tin of Entomology 17 * 1** 2*** 邓 顺 张友军 ( 1. 314000; 2. 100081) The mechanisms of sympatric speciation in insects and the evaluation. DENG Shun1** , ZHANG You-Jun2*** ( 1. Research Institute of Subtrop ical Forestry , Chinese Academy of Forestry, Fuyang, Zh jiang 311400, China; 2. Institute of Vegetables and Flowers, ChineseAcademy of Agricultural Science, B ijing 100081, China) Abstract Possibl m chanisms of sympatric sp ciation in ins cts w r discuss d in vi w of th ir biology, cology and g n tics. Disruptiv s l ction on sympatrically incipi nt sp ci s, which is associat d with distinctiv div rg nc on cological and g n tic traits, promot d compl t or partial r productiv isolation b tw n sympatrically r lat d populations. Charact r displac m nt, assortativ mating and s xual s l ction w r involv d in th cours of sympatric sp ciation. Host-sp cific ins cts w r good cas s for int rpr ting sympatric diff r ntiation and most of th m w r phytophagous. V rifiabl crit ria for ins ct sympatric sp ciation propos d by som volutionists and ntomologists mainly ncompass d th t st of assortativ mating, quantification of g n flow, asc rtaining th xt nt of g n tic diff r ntiation, stimation of linkag dis quilibrium among loci and hybrids fitn ss, at th lik It was possibl to d monstrat sympatric sp ciation in som ins cts, but furth r r s arch was n d d to lucidat th m chanisms of r productiv isolation. Key words sympatric sp ciation, disruptiv s l ction, r productiv isolation, host-sp cialization, v rifiabl crit rion , , , , ( LD) , , , , , , ( sympatric sp