中文摘要：

以4种不同类型的玉米（Zea mays L.）为材料,研究了不同类型和同一类型不同粒位子粒胚乳细胞增殖动态与粒重的关系.胚乳增殖动态可用Richards方程拟合.不同类型玉米胚乳细胞数有明显差异,表现为普通玉米（豫玉22号）＞甜玉米（甜玉6号）＞爆裂玉米（爆裂1号）＞糯玉米（黄糯1号）;不同粒位胚乳细胞数表现为中部＞下部＞上部.同一类型玉米粒重与胚乳细胞数呈极显性正相关,不同类型玉米间则胚乳细胞数与其他因素一起决定粒重.

英文摘要：

Cell proliferation is one of the most important characters for life. The dynamic of endosperm cell proliferation and it＇s relation to grain weight were studied using four types of maize. The result showed that the proliferation process of endosperm cell could be better modeled with Richards equation. The endosperm cell number of different cuhivars had significant difference. It showed that the endosperm cell number of Yuyu22 was the greatest, the endosperm cell number of Huangnuol was the smallest, the Tianyu6 and the Baoliel were between other two cuhivars. And the endosperm cell number of the middle spike was the greater than that of upper part spike, the endosperm cell number of lower part spike was between other two positions. For the same type maize the endosperm cell number was significantly related, to grain weight, but for the different type maize the grain weight was not mainly determined by the number of endosperm cell number.