| Elymus sibiricus, E. nutans 和 E. burchan-buddae 的形态学鉴定及其染色体组亲缘关系的研究 |
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| 引用本文： | 卢宝荣.Elymus sibiricus, E. nutans 和 E. burchan-buddae 的形态学鉴定及其染色体组亲缘关系的研究[J].中国科学院研究生院学报,1994,32(6):504-513. |
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| 作者姓名： | 卢宝荣 |
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| 摘 要： | 为了进一步研究Elymus sibiricus L.、E．nutans Griseb．和E．burchan-buddae(Neuski)Tzelev
＝Roegneria nutans(Keng)Keng]的外部形态差异及其系统学关系，本文对这三种植物的6个穗部形
态性状进行了观测和比较，并对这三个Elymus种进行了种间杂交及杂种F1的减数分裂染色体配对行
为的分析研究。结果表明：这三个Elymus种的穗长及颖长等性状均变异很大，而内稃的长、宽则变异
不大并具有明显的种间差异。E. nutans×E．barchan-buddae及E.nutans×E．sibiricus的杂种F1均完
全不育，减数分裂不规则。E．nutans×E．burchan-buddae杂种F1的减数分裂构型为：7.70I+13.40
Ⅱ+0.06Ⅲ+O.08 Ⅳ，而E．sibiricus×E．nutans杂种F1的构型为11.98 Ⅰ+9.61Ⅱ+O.64Ⅲ+0.39
Ⅳ+0.01V。由本实验的形态学和细胞学的研究结果得出以下结论：1．利用内稃形态性状结合穗部
其它性状的差异能对这三个物种进行较准确的鉴定；2．E．nutans与E.burchan-buddae的亲缘关系较
近，而E．nutans与E．sibiricus的亲缘关系则较远；3. E，burchan-buddae×E．nutans的杂种Fl中存在着染色体配对控制因子。
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| 关 键 词： | 小麦族 披碱草属 形态变异 染色体组分析 物种关系 |
Morphological Identification of Elymus sibiricus, E. nutans, and E. burchan-buddae, and Their Genomic Relationships |
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| Lu Bao-rong.Morphological Identification of Elymus sibiricus, E. nutans, and E. burchan-buddae, and Their Genomic Relationships[J].Journal of the Graduate School of the Chinese Academy of Sciences,1994,32(6):504-513. |
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| Authors: | Lu Bao-rong |
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| Abstract: | In order to investigate morphological variations of Elymus sibiricus L., E. nutans
Griseb., and E. burchan-buddae (Nevski) Tzvelev ［=Roegneria nutans (Keng) Keng］,
and to explore their systematic relationships, six morphological characters were measured
and compared between the Elymus species. Interspecific hybridizations between E. nutans
and E. sibiricus, and E. burchan-buddae were carried out with the aid of embryo rescue.
Chromosome pairing behaviour was also analysed at metaphase- I of meiosis in pollen moth-
er cells of F1 hybrids. Morphologic characters, such as length of spikes and length of glumes
varied considerably between different individuals of each species, whereas length and width
of paleas were quite stable and different between species. The interspecific hybrids were com-
pletely sterile and their meioses were irregular. Meiotic configuration of E. nutans × E. bur-
chan-buddae was 7.70I +13.40Ⅱ+0.06Ⅲ+0.08 IV, whereas that of E. sibircus×E.
nutans was 11.98I+9.61Ⅱ+0.64Ⅲ+0.39Ⅳ+0.01V. It is concluded from the mor-
phological and cytological study that (1) it is possible to identify the three Elymus species
using the palea character, in addition to other traditionally applied characters; (2) Elymus
nutans and E. burchan-buddae have a comparatively high genomie relationship, while E. nu-
tans and E. sibircus have a relatively low genomic affinity to one another; and (3) a certain
chromosome pairing regulator was presented in the hybrid between E. burchan-buddae andE. nutans. |
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| Keywords: | Triticeae Elymus morphological variation genomic analysis species relationship |
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