拟南芥（L.）heynh 在有限的二氧化碳中生存的种族变异。

Variations among races of Arabidopsis thaliana (L.) heynh for survival in limited carbon dioxide.

机构信息

Department of Genetics, The Ohio State University, Columbus, Ohio, USA.

出版信息

Theor Appl Genet. 1979 Jan;54(1):11-5. doi: 10.1007/BF00265702.

Abstract

Races of a C3 plant species, Arabidopsis thaliana, were screened for time of survival when enclosed in an air-tight chamber with a C4 plant species (Zea mays L.). This has been suggested as a method of detecting and selecting for increased photosynthetic efficiency among C3 genotypes. The C4 plant should, in such conditions, reduce the atmospheric CO2 concentration below the compensation point of the C3 plant, resulting in its eventual death. Significant differences were found among the A. thaliana races for survival time; some races survived only one week in competition with corn while others survived more than two weeks. Two races, chosen for contrasting survival in closed chambers, were hybridized and compared to their F2 progeny for survival time. Substantial genetic segregation occurred among the F2, and a number of transgressive segregates having survival times superior of both parents were identified. Also significant heterosis was observed in the F2 population.

摘要

对拟南芥（Arabidopsis thaliana）的不同品种进行筛选，在与 C4 植物（玉米，Zea mays L.）一起密闭的室内环境中，观察其存活时间。这种方法被认为是检测和筛选 C3 基因型中光合作用效率提高的方法。在这种情况下，C4 植物应该会降低 C3 植物的补偿点以下的大气 CO2 浓度，导致 C3 植物最终死亡。在与玉米竞争时，拟南芥的不同品种的存活时间存在显著差异；有些品种只能存活一周，而有些品种则能存活两周以上。选择在密闭室内具有不同存活时间的两个品种进行杂交，并比较其 F2 代的存活时间。F2 代中发生了大量的遗传分离，鉴定出了一些具有优于双亲的存活时间的超亲分离。在 F2 代中也观察到了显著的杂种优势。