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单位面积的产油量是由种籽产量,含油量和出油率所决定,油菜含油量的遗传性较稳定,受外界环境影响较小,据瑞典奥尔森等(Closson.G 等1963)研究,甘兰型不同材料含油量的变异系数为3.6—8.4%,而单株种子产量的变异系数为60%,提高含油量与出油率育种比提高种子产量育种更易见效,早在40年代,瑞典等就已开展了高含油量育种工作,日本、加拿大相继进行了研究,先后育成一批高含油量的油菜品种如日本的农林43,含油量49%,加拿大的齐菲,含油量51%等。
The oil yield per unit area is determined by the seed yield, oil content and oil yield. The heritability of oil content is relatively stable and less affected by the external environment. According to Sweden Olson et al. (Closson, G et al., 1963) The coefficient of variation (CV) of oil content in different types of kulan type was 3.6-8.4%, while the coefficient of variation of single seed yield was 60%. Breeding higher oil content and oil yield was more effective than raising seed yield breeding. As early as the 40s , Sweden, etc. have carried out high oil content breeding work, Japan, Canada have conducted a study, has bred a group of high oil content of rapeseed varieties such as Japan’s agriculture and forestry 43, oil content 49%, Canada’s Qi Fei, oil content 51 %Wait.