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(四)杂种优势利用的研究杂种优势利用是从杂交育种工作中派生出来的一个分支,也是能显著提高农作物产量的一种有效手段,发展非常迅速。油菜杂种优势利用的途径,有以下三方面:
(D) the study of the utilization of heterosis heterosis utilization is derived from hybrid breeding a branch, but also significantly increase the yield of crops is an effective means of rapid development. The rape heterosis uses the way, has the following three aspects: