罗家角遗址水稻硅酸体形状特征及其在水稻进化上的意义

Morphological characteristics of silica bodies from motor cells of rice from Luojiajiao site and their implication on rice evolution

对距今约 70 0 0年的浙江省罗家角遗址 4个文化层出土的 15块陶片进行了植物硅酸体分析 ,结果从来自第 2、3、4等 3个文化层的 5块陶片中检出了稻运动细胞硅酸体 .形状解析结果显示 :罗家角遗址水稻硅酸体的纵长、横长较小 ,形状系数较大 ,是一类小型硅酸体 ;利用硅酸体 4个形状特征参数进行亚种判别的判别值也较小 ,和现代栽培稻籼亚种的硅酸体更相近 .但在硅酸体的分布图上出现多峰现象 .从硅酸体形状分析结果看 ,罗家角遗址及其周围的栽培稻可能是一些以籼亚种为主 ,并混杂粳亚种的多样性群体 .

Analysis of silica bodies was carried out for 15 earthenware fragments unearthed from 4 cultural layers of the Luojiajiao site, Zhejiang. As a result, the silica bodies of rice were detected in 5 earthenware fragments from the 2 nd , 3 rd and 4 th cultural layers. Further, analyzing of morphological characteristics showed that the silica bodies were small comparatively, with short vertical, horizontal lengths and big shape coefficients, small discrimination scales based on the shape. The results implied that they were similar to the silica bodies driving from indica more than from japonica. Also, it appeared that the distributions of the silica bodies were of multi-peaks. From the results, it was supposed that rice cultivated in the Luojiajiao site or around it, 7000 years ago were varied populations, in which hsien (indica) was main and king (japonica) was contained too.