草地学报

›› 1997, Vol. 5 ›› Issue (4): 281-285.DOI: 10.11733/j.issn.1007-0435.1997.04.009

• 研究论文 • 上一篇    下一篇

披碱草与野大麦的属间杂交及F1代细胞学分析

王照兰1, 杜建才1, 云锦凤2   

  1. 1. 中国农业科学院草原研究所, 呼和浩特, 010010;
    2. 内蒙古农牧学院草原系, 呼和浩特, 010018
  • 出版日期:1997-11-15 发布日期:1997-11-15

Intergeneric Hybridization and its Cytological Analysis of Elymus dahuricus and Hordeum brevisubulatum

Wan Zhaolan1, DU Jiancai1, Yun Jinfeng2   

  1. 1. Grassland Research Institute of CAAS, Huhhot 010010;
    2. Inner Mongolia Institute of Agricultural and Animal Husbandry, Huhhot 010018
  • Online:1997-11-15 Published:1997-11-15

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摘要： 本研究用披碱草与野大麦进行远缘杂交,正反交均获得杂交种子及F1代植株。杂种F1在芒长和林高方面介于双亲之间,而穗形外观类似于野大麦。杂种F1花粉母细胞减数分裂中期I染色体配对构型频率为:7.94Ⅰ、10.95Ⅱ、1.52Ⅲ、0.15Ⅳ。后期Ⅰ、Ⅱ普遍含有落后染色体、染色体桥、染色体不均等不同步分离现象。四分体普遍含有数目不等的微核。杂种F1代不育。从杂种表现方面分析,F1代分蘖增多,生长期延长,叶量丰富,具有明显的育种潜力。

关键词: 属间杂交, 细胞学分析, 杂种F1代

Abstract: In this study, the reciprocal hybrids and F1 plants of Elymus dahuricus Turcz and Hordeum brevisubulatum (Trin) Link have been obtained.The awn length and plant height of F1 hybridswere intermediate between those of the parents, but shape of spikes is same as the Hordeum brevisubulatum.The chromosome pairing at metaphase I of F1 hybrids is 7.94 I、10.95 II、1.52 III、0.15 IV.Anaphase I and II commonly contained lagging chromosomes, bridgefragments, unequal disjunctions and nonsynchronized disjunctions.The hybrids were totally sterle.Through observation we found the number of tiller of F1 hybrids was increased, growing period was prolonged and the leaves was more abundant than their parents.It's breeding potential is considerable.

Key words: Intergeneric hybridization, Cytological analysis, Hybrid F1