為了驗(yàn)證Pi36候選基因的功能,利用長(zhǎng)片段PCR(long-range PCR,LR-PCR)技術(shù)從Pi36基因的供體品種Q61中擴(kuò)增了3個(gè)候選基因Pi36-1,Pi36-2,Pi36-3,長(zhǎng)度分別為5.9kb,9.6kb和16.5kb,電泳回收目的片段,將Pi36-1和Pi36-2分別克隆到雙元載體pCAMBIA1300,而將Pi36-3克隆到雙元載體pYLTAC27的AscI位點(diǎn)。為了將Pi36-3也克隆到具有高效轉(zhuǎn)化效率的雙元載體pCAMBIA1300中,首先在不改變pCAMBIA1300基本骨架的前提下,在其多克隆位點(diǎn)增加了AscI酶切位點(diǎn),獲得新載體pCAMBIA1300AscI;然后將克隆在載體pYLTAC27上的Pi36-3片段切下來(lái),組裝到新載體pCAMBI-A1300AscI上。經(jīng)過(guò)酶切鑒定和測(cè)序分析,已成功地獲得了3個(gè)候選基因的重組陽(yáng)性克隆,為進(jìn)一步地研究Pi36基因的功能奠定了基礎(chǔ)。
To identify three candidate genes predicted,long-range PCR(LR-PCR) was employed to amplify each of the candidate genes based on the genomic DNA of the donor cv.Q61.The appropriate products of the Pi36-1 and Pi36-2 were purified and then ligated into the binary vector of pCAMBIA1300,as well as that of the Pi36-3 ligated into the binary vector of pLYTAC27 and the reconstructed pCAMBIA1300AscI,respectively.The results would aid to dissect the function of the resistance gene Pi36.