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首页> 外文期刊>Chinese science bulletin >Functional characterization and mapping of two MADS box genes from peach (Prunus persica)
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Functional characterization and mapping of two MADS box genes from peach (Prunus persica)

机译：桃的两个MADS盒基因的功能鉴定和作图

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Previously an AGAMOUS gene homologue PpMADS4 and a FRUITFULL gene homologue PpMADS6 were isolated from peach (Prunus persica), and both genes were shown to express in the developing floral and fruits. To gain insight into their function, the two genes were constitutively expressed in Arabidopsis thaliana and their effects on plant growth and floral organ development were studied in this work. The transgenic plants all displayed early flowering and conversion of inflorescence to floral meristem. However, the two genes had different effects on the floral organ structures in A. thaliana. The transgenic plants overexpressing PpMADS4 displayed homeotic conversion of floral organs, and particularly the perianth abscission was inhibited. The plants overexpressing PpMADS6 showed early flowering, produced higher number of carpels, petals, and stamens than nontransgenic plants, and pod shatter was prevented; significantly, the transgenic plants yielded more than one siliques from a single flower. A SSR molecular marker was developed for PpMADS4, and it was then assigned into the G5 linkage group of Prunus sp. Both PpMADS4 and PpMADS6 genes were located at the same region in the G5 linkage group. Our results showed the potential application of these two MADS box genes for crop and fruit tree improvement.
机译：以前，从桃（Prunus persica）中分离出一个AGAMOUS基因的同源物PpMADS4和一个FRUITFULL基因的同源物PpMADS6，并且两个基因都显示在发育中的花和果实中表达。为了深入了解它们的功能，在拟南芥中组成性表达了这两个基因，并在这项工作中研究了它们对植物生长和花器官发育的影响。这些转基因植物均显示出早期开花并将花序转化为花分生组织。但是，这两个基因对拟南芥的花器官结构有不同的影响。过表达PpMADS4的转基因植物显示出花器官的同源转化，特别是花被脱落被抑制。过表达PpMADS6的植物比非转基因植物显示早开花，产生更多的心皮，花瓣和雄蕊，并且防止了豆荚的破碎。值得注意的是，转基因植物从一朵花中产生了一个以上的角果。开发了用于PpMADS4的SSR分子标记，然后将其分配到Prunus sp。的G5连锁组中。 PpMADS4和PpMADS6基因都位于G5连锁组的同一区域。我们的结果表明这两个MADS盒基因在作物和果树改良中的潜在应用。

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