PFRU, a single dominant locus regulates the balance between sexual and asexual plant reproduction in cultivated strawberry
PFRU, a single dominant locus regulates the balance between sexual and asexual plant reproduction in cultivated strawberry
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DOI：
10.1093/jxb/ert047
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发表时间：
2013-04-01
影响因子：
6.9
通讯作者：
Denoyes, Beatrice
中科院分区：
文献类型：
--
作者：
Gaston, Amelia;Perrotte, Justine;Denoyes, Beatrice
草莓(Fragaria sp.)是研究多年生多年生植物开花行为及其与植物无性繁殖关系的有趣模型。草莓产生花序和匍匐茎(也称为侧茎)，后者是生长在土壤表面的侧茎，产生新的克隆植物。本研究对栽培八倍体草莓(Fragariaananassa Duch.，2n856)的开花习性和开花习性进行了研究。利用这两种类型杂交产生的假全同胞F1群体，进一步研究了永久开花和开花性状的遗传基础。结果表明，在栽培的八倍体草莓中，控制这两个性状的是一个名为FaPFRU的主效数量性状基因座。该基因座与影响鹅绒草永久开花(SFL)和开花(R)的基因座不是同源的，这表明二倍体和八倍体Fragaria spp.对永久开花和开花的遗传控制不同。此外，FaPFRU QTL对开花(正效应)和开花(负效应)表现出相反的效应，表明这两个性状具有共同的生理控制。这些结果表明，该基因通过控制植物有性繁殖和无性繁殖之间的平衡，在草莓植株适合性中起着重要作用。
Strawberry (Fragaria sp.) stands as an interesting model for studying flowering behaviour and its relationship with asexual plant reproduction in polycarpic perennial plants. Strawberry produces both inflorescences and stolons (also called runners), which are lateral stems growing at the soil surface and producing new clone plants. In this study, the flowering and runnering behaviour of two cultivated octoploid strawberry (Fragariaananassa Duch., 2n856) genotypes, a seasonal flowering genotype CF1116 and a perpetual flowering genotype Capitola, were studied along the growing season. The genetic bases of the perpetual flowering and runnering traits were investigated further using a pseudo full-sibling F1 population issued from a cross between these two genotypes. The results showed that a single major quantitative trait locus (QTL) named FaPFRU controlled both traits in the cultivated octoploid strawberry. This locus was not orthologous to the loci affecting perpetual flowering (SFL) and runnering (R) in Fragaria vesca, therefore suggesting different genetic control of perpetual flowering and runnering in the diploid and octoploid Fragaria spp. Furthermore, the FaPFRU QTL displayed opposite effects on flowering (positive effect) and on runnering (negative effect), indicating that both traits share common physiological control. These results suggest that this locus plays a major role in strawberry plant fitness by controlling the balance between sexual and asexual plant reproduction.