本文選題：木地膚 + 短花針茅�。� 參考：《生態(tài)學(xué)報(bào)》2016年21期

【摘要】：為探究全球變暖對溫帶荒漠草原地上種群的遺傳影響,對已經(jīng)接受模擬增溫處理6年的短花針茅草原4種不同生活型植物,即半灌木、多年生禾草、多年生雜類草和一年生植物,應(yīng)用AFLP分子標(biāo)記方法研究了其遺傳多樣性和遺傳結(jié)構(gòu)。結(jié)果顯示,對照處理與增溫處理下的木地膚、短花針茅、細(xì)葉蔥、豬毛菜4種植物的多態(tài)位點(diǎn)百分率(PPB)分別為11.32%,11.32%;40.83%,39.91%;14.29%,13.10%;19.85%,19.12%。Nei's基因多樣性指數(shù)(He)分別為0.0274,0.0259;0.0812,0.0899;0.0131,0.0084;0.0506,0.0456。Shannon's信息指數(shù)值(I)分別為0.0447,0.0430;0.1354,0.1466;0.0267,0.0182;0.0811,0.0733。分子方差分析(AMOVA)顯示4種植物的變異主要來源于實(shí)驗(yàn)處理內(nèi)部,木地膚為85.03%,短花針茅為66.35%,細(xì)葉蔥為70.00%,豬毛菜為66.52%;增溫處理間的變異分別占-2.81%,-5.47%,-3.60%,2.53%(P0.05)。4種植物增溫處理與變異程度之間在統(tǒng)計(jì)學(xué)上并無相關(guān)性。研究表明雖然短時(shí)間的模擬增溫并不足以使4種生活型植物種群遺傳多樣性和遺傳結(jié)構(gòu)發(fā)生顯著變化,但相對于3種多年生植物,一年生植物豬毛菜更容易受到增溫影響。多年生和一年生植物對增溫具有不同的遺傳響應(yīng)。
[Abstract]:In order to investigate the genetic effects of global warming on the aboveground population of temperate desert steppe, four species of different life forms, namely, subshrubs, perennial grasses, have been treated with simulated warming for 6 years. The genetic diversity and genetic structure of perennial hybrids and annual plants were studied by AFLP molecular marker method. 緇撴灉鏄劇ず,瀵圭収澶勭悊涓庡娓╁鐞嗕笅鐨勬湪鍦拌偆,鐭姳閽堣寘,緇嗗彾钁，

本文編號(hào)：1820634