向日葵(H.annuus)瘦果类型分类方法及标准的探讨

STUDY ON THE SHAPES OF ACHENES CLASSIFYING METHOD AND STANDARD IN SUNFLOWER（Helianthus annuus）

摘要:

本文通过对国内外700余份品种资源瘦果类型结构的分析,指出:向日葵瘦果,不论其形状如何都由长、宽、厚三大要素构成。瘦果之所以是多态的,就是由于长、宽、厚三大构成要素间比例不同所至。本文依长度要素作为分类的依据,依宽长比值作为型的区分标准。首次明确提出了4类4型叶160种类型的分类标准。该分类标准,已被确定为编写全国向日葵品种资源目录该项目的统一分类标准。

Abstract:

In this paper, by analysing the structure of achenes shapes of over seven hundred species tesources, it shows that no matter its shafes, it comfosed of length width and thickness, as a resurt of the different profortion of length, width and thickness. There are various kinds of achenes shapes Taking the length and the ratio of width and Length as the basis of classification and of distinguishing standard of shapes, respectively, the classification standard of four types and four shapes（sixteen shapes）was first ckarly raised, This classifying method has been used as standard of compilling the catacogue of sunflower species resources in China.