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Branching is a predominant element in the plant architecture of Brassica napus L. and represents an important determinant of seed yield. OsPAT15 ( OsDHHC1 ), a novel DHHC-type zinc finger protein gene, was reported to regulate rice plant architecture by altering the tillering. However, whether heterologous overexpression of the OsPAT15 gene from the monocot rice into the dicot B. napus L. would have the same effect on branching or seed yield is unknown. In this study, the DHHC-type zinc finger protein gene OsPAT15 was determined to have sulfur acyl transferase activity in the akr1Δ yeast mutant in a complementation experiment. Heterologously expressing OsPAT15 transgenic B. napus L. plants were obtained using the Agrobacterium -mediated floral-dip transformation method. As anticipated, OsPAT15 transgenic plants exhibited branching and seed yield. Compared with non-transgenic plants, OsPAT15 transgenic plants had increased primary branches (1.58-1.76-fold) and siliques (1.86-1.89-fold), resulting in a significant increase in seed yield (around 2.39-2.51-fold). Therefore, overexpression of the sulfur acyl transferase gene OsPAT15 in B. napus L. could be used to increase seed yield and produce excellent varieties.

breeding science

Increasing branch and seed yield through heterologous expression of the novel rice S-acyl transferase gene &lt;i&gt;OsPAT15&lt;/i&gt; in &lt;i&gt;Brassica napus&lt;/i&gt; L.