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披碱草属及其近源属植物种子胚乳细胞多样性研究(PDF)

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2015年02期
页码:
173-177
栏目:
系统与进化
出版日期:
2015-04-20

文章信息/Info

Title:
Diversity of endosperm cells in Elymus and related diploid genera
文章编号:
1000-3142(2015)02-0173-05
作者:
高 刚 王 茜 苟学梅 张 艳 唐紫琳 杨瑞武*
四川农业大学 生命科学学院, 四川 雅安 625014
Author(s):
GAO Gang WANG Qian GOU Xue-Mei ZHANG Yan TANG Zi-Lin YANG Rui-Wu*
College of Life Sciences, Sichuan Agricultural University, Ya’an 625014, China
关键词:
小麦族 披碱草属 胚乳细胞 多样性
Keywords:
Triticeae Elymus endosperm cell diversity
分类号:
Q944.46
DOI:
10.11931/guihaia.gxzw201402005
文献标识码:
A
摘要:
披碱草属不仅是小麦、大麦等作物的重要基因库,也是优良牧草的重要组成部分。胚乳是麦类作物种子的重要组成部分,其重量占籽粒重量在90%以上。胚乳特性是一个相对稳定的遗传性状,可以将胚乳特性作为植物分类和系统关系的一个指标。胚乳细胞特征作为植物的一类微形态特征,在麦类植物系统分类与进化研究中具有一定的价值。该研究对小麦族的6个披碱草属(Elymus)物种、2个拟鹅观草属(Pseudoroegneria)物种、1个大麦属(Hordeum)物种和2个冰草属(Agropyron)物种,共4属11份材料的胚乳细胞特征进行解剖观察并测量相关指标。结果表明:(1)不同属、种的植物种子胚乳细胞之间存在丰富的多样性,属间差异大于属内种间差异;(2)同样具有P染色体组的Agropyron cristatumA. mongolicum与同样具有St染色体组的Pseudoroegneria libanoticaP. spicata各自在细胞形状和大小上的差异很小;(3)不同物种的胚乳细胞在大小、形状和数量上均表现出差异,但不能很好地反映属以及基因组间的差异,研究结果为揭示披碱草属植物的系统关系提供了胚乳细胞方面的证据,同时也为利用该属植物改良麦类作物品质积累资料。
Abstract:
Elymus L. is not only an important gene pool for crops, such as wheat and barley, but also an important part of fine forages. The endosperm is a important part to seeds of cereal crops and the weight of endosperm is more than 90% in cereal crops seeds. The endosperm characteristics is a relatively stable genetic character, which can be used as a indicator to research plant classification and phylogenetic relationships. As the kind of micro morphological characteristics of plants, the endosperm characteristics is valuable in phylogeny of Triticeae. To provide evidence of the endosperm cells for reveal the phylogenetic relationships of Elymus species, as well as accumulate data for use the genus improve the quality of wheat and barley. The endosperm cells of 11 Triticeae species which belong to 6 Elymus species, 2 Pseudoroegneria species, 1 Hordeum species or 2 Agropyron species, were surveyed in this paper. The results were as follows:(1)Significant variations existed in the size, forms and quantity of endosperm cells in those species;(2)The cell shape and size existed small variations in Agropyron cristatum(P), A. mongolicum (P)and Pseudoroegneria libanotica (St), P. spicata (St), respectively;(3)The differences in genera were smaller than those in species, indicating that the characters of endosperm cells had less value in the systematic studies of those genera than in the studies of those species in Triticeae.

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备注/Memo

备注/Memo:
收稿日期: 2014-04-28修回日期: 2014-06-27
基金项目: 国家自然科学基金(30870154)
作者简介: 高刚(1987-),男,四川雅安人,博士研究生,从事植物系统与进化研究,(E-mail)gaogang870522@163.com。 *通讯作者: 杨瑞武,博士,教授,主要从事植物系统与进化研究,(E-mail)yrwu@sicau.edu.cn。
更新日期/Last Update: 2015-04-20