甘藍(lán)型油菜脯氨酸合成相關(guān)同源基因的進(jìn)化和差異表達(dá)分析
[Abstract]:The evolutionary fate of P5CS and OAT genes of proline biosynthesis pathway and the differential expression of homologous genes from different ancestral sources of (Brassica napus) and diploid Chinese cabbage (B.rapa) and Brassica napus (B.oleracea) were studied by using allotetraploid Brassica napus (Brassica napus L.) and its diploid ancestors (B.rapa) and Brassica napus (B.oleracea). Sequence alignment and evolution analysis showed that P5CS gene and OAT gene were highly homologous to their diploid ancestors, and that P5CS2 gene of Brassica napus had a copy loss compared with diploid parent. The results of semi-quantitative RT-PCR showed that the autogenes of P5CS2 and OAT from diploid parent cabbage and cabbage were expressed in all the tested organs without gene silencing. However, they may have subfunctionalization. Two homologous genes of P5CS2 from different ancestors showed weak biased expression, and the expression patterns of homologous genes in different organs were slightly different. However, the OAT gene was inclined to express homologous genes from the ancestors of Brassica oleracea, and the expression patterns of two homologous genes of OAT were basically the same. The expression of BnaC.P5CS1.d from Brassica napus was significantly higher than that from Brassica campestris Bna A.P5CS1.a, which indicated that the expression of BnaC.P5CS1.d. in Brassica napus was biased under salt treatment. The salt-induced expression patterns of proline biosynthesis gene Bna A.P5CS1.aP5CS1.d and Bna A.P5CS2.aBnaC.P5CS2.c of Brassica napus maintained the characteristics of parental genes. These results suggest that proline synthesis gene sequences and expression patterns in Brassica napus are highly conserved compared with diploid ancestors, which may indicate the evolutionary advantage of proline accumulation in plants.
【作者單位】: 寧夏林業(yè)研究院種苗生物工程國家重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院植物研究所;中國科學(xué)院大學(xué);Department
【基金】:寧夏自然科學(xué)基金項(xiàng)目(NZ16215)資助~~
【分類號(hào)】:Q943.2;S565.4
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