The FLOWERING LOCUS T-like gene family in barley (Hordeum vulgare)
The FLOWERING LOCUS T-like gene family in barley (Hordeum vulgare)
复制标题
DOI：
10.1534/genetics.106.069500
复制
发表时间：
2007-05-01
期刊：
影响因子：
3.3
通讯作者：
Laurie, David A.
中科院分区：
文献类型：
--
作者：
Faure, Sebastien;Higgins, Janet;Laurie, David A.
开花位点T（开花位点T）基因在拟南芥开花信号整合中起核心作用，其表达受光周期和春化途径的拮抗调控。FT属于一个由6个基因组成的家族，其特征是一个磷脂酰乙联胺结合蛋白（PEBP）结构域。在水稻（Oryza sativa）中，已有19个PEBP基因被报道，其中13个是ft样基因。在大麦（Hordeum vulgare）中发现了5个ft样基因。HvFT1、HvFT2、HvFT3、HvFT4分别与OsFTL2 （Hd3a QTL）、OsFTL1、OsFTL10、OsFTL12高度同源，这种关系得到了比较映射的支持。在水稻中没有发现HvFT5的等价物。在长日照（诱导）条件下，茎尖由营养生长向生殖生长形态转换时，HvFT1高表达。HvFT2和HvFT4在发育后期表达。因此，HvFT1被确定为主要的大麦ft样基因，参与了开花的转换。HvFT基因的定位表明它们是大麦开花时间变异的重要来源。HvFTI是VRN-H3的候选基因，VRN-H3是导致早熟开花的显性突变，而HvFT3是影响短日开花时间的主要QTL Ppd-H2的候选基因。
The FLOWERING LOCUS T(FT) gene plays a central role in integrating flowering signals in Arabidopsis because its expression is regulated antagonistically by the photoperiod and vernalization pathways. FT belongs to a family of six genes characterized by a phosphatidyletlianolamine-binding protein (PEBP) domain. In rice (Oryza sativa), 19 PEBP genes were previously described, 13 of which are FT-Iike genes. Five FT-like genes were found in barley (Hordeum vulgare). HvFT1 HvFT2, HvFT3, and HvFT4 were highly homologous to OsFTL2 (the Hd3a QTL), OsFTL1 OsFTL10, and OsFTL12, respectively, and this relationship was supported by comparative mapping. No rice equivalent was found for HvFT5. HvFT1 was highly expressed under long-day (inductive) conditions at the time of the morphological switch of the shoot apex from vegetative to reproductive growth. HvFT2 and HvFT4 were expressed later in development. HvFT1 was therefore identified as the main barley FT-like gene involved in the switch to flowering. Mapping of HvFT genes suggests that they provide important sources of flowering-time variation in barley. HvFTI was a candidate for VRN-H3, a dominant mutation giving precocious flowering, while HvFT3 was a candidate for Ppd-H2, a major QTL affecting flowering time in short days.