滇型杂交粳稻及其亲本稻米铁、锌元素含量的分析

 分析了208份滇型（滇1型）杂交粳稻（杂交稻及其恢复系和保持系）稻米的铁、锌元素含量。结果表明，这些材料的铁、锌含量的变幅很大，糙米、精米的铁含量分别为14.49～38.06 mg·kg-1和5.50～27.81 mg·kg-1；锌含量分别为11.64～42.39 mg·kg-1和10.95～36.74 mg·kg-1。糙米的铁、锌含量分别是精米的2.11倍和1.23倍。糙米和精米中锌元素含量的相关系数为0.684，铁的相关系数为0.271。铁含量与锌含量在糙米间存在显著正相关。铁含量与锌含量在稻米中的遗传机制可能不一样。无论是糙米还是精米，恢复系平均含锌量均显著高于保持系。同一亲本（保持系或恢复系）配制的不同杂交组合都有高于或不低于亲本含量的组合。虽然杂交稻亲本（保持系或恢复系）稻米铁、锌含量分别与其杂交稻的铁、锌含量没有明显的相关性，大部分杂交稻稻米的铁、锌含量居于双亲含量之间，但有少数组合的铁或锌含量超亲明显。因此，选配富铁、锌的杂交组合是非常可能的。

Iron and Zinc Contents in Japonica Hybrid Rice Based on CMS-D1 System

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.