Sanda S, John M, Amasino R
Department of Biochemistry, University of Wisconsin, Madison 53706-1569, USA.
J Hered. 1997 Jan-Feb;88(1):69-72. doi: 10.1093/oxfordjournals.jhered.a023061.
There exists variation in the timing of the initiation of flowering among different ecotypes of Arabidopsis thaliana. We have examined the basis of this variation between the early flowering Columbia (Col) ecotype and the late flowering ecotypes. Coimbra (Co-4), Geneva (Ge-2), and Zu-rich (Zu-0). In crosses of Col to Co-4, Ge-2, and Zu-0, the late flowering trait behaved as a single dominant gene the F1 plants were late flowering and in segregating F, populations a 3:1 ratio of late to early flowering plants was observed. This dominant gene resides in a region of chromosome 4 that contains a gene (FRIGIDA) conferring late flowering in certain other Arabidopsis ecotypes. Allelism tests indicate that the same genesis responsible for late flowering in Co-4, Ge-2. Zu-0, and the San Feliu (Sf-2) ecotype. These and previous results indicate that FRIGIDA accounts for much of the later flowering observed in various ecotypes of Arabidopsis.
不同生态型的拟南芥在开花起始时间上存在差异。我们研究了早花的哥伦比亚（Col）生态型与晚花生态型，即科英布拉（Co - 4）、日内瓦（Ge - 2）和苏黎世（Zu - 0）之间这种差异的基础。在Col与Co - 4、Ge - 2和Zu - 0的杂交中，晚花性状表现为单个显性基因，F1植株为晚花，在分离的F2群体中，观察到晚花植株与早花植株的比例为3:1。这个显性基因位于4号染色体的一个区域，该区域包含一个在某些其他拟南芥生态型中导致晚花的基因（FRIGIDA）。等位性测试表明Co - 4、Ge - 2、Zu - 0和圣费利乌（Sf - 2）生态型中导致晚花的是同一个基因。这些结果以及之前的结果表明，FRIGIDA是拟南芥各种生态型中观察到的大部分晚花现象的原因。
