关键词: 滇型杂交粳稻, 铁, 锌, 矿质营养

Abstract: Iron and zinc contents of rice were analyzed with 208 rice lines, including japonica hybrids, corresponding restorers, maintainers (CMS-D1 system). The results indicated that the iron contents were ranged from 14.49 to 38.06 mg·kg-1 in brown rice, and from 5.50 to 27.81 mg·kg-1 in polished rice. The zinc contents were from 11.64 to 42.39 mg·kg-1, and from 10.95 to 36.74 mg·kg-1, respectively, in brown and polished rice. Obviously, the mean contents of iron and zinc in brown rice were, respectively, 2.11 and 1.23 times of that in polished rice. At the same time, content correlation coefficients of iron or zinc in brown and polished rice were 0.271 and 0.684, respectively, and significant correlation was also found between iron and zinc contents. On average, iron and zinc contents of restorers were higher than that of maintainers, and the contents of hybrids were ranged between those of their parents either in brown or polished rice, except a few hybrids, which displayed hybrid vigor in the contents. Therefore, it is possible to develop hybrid rice which is reach in iron and zinc elements.

Key words: Japonica hybrid rice of Dian-type, Iron, Zinc, Mineral nutrition