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Interspecific Hybridization and its Cytology of Elymus Canadensis × E. sibiricus.

Yun Jinfeng (Inner Mongolia Institute of Agricultural and Animal Husbandry), Wang Zhaolan, Du Jiancai (Grassland Research Institute, CAAS)  
Elymus canadensis and E. sibiricus belong to Elymus genus of Trib triticea. Both are Allotetraploid (2n=28) bunchgrass. Cross between two species is known as geographycal distant and same polyploid level hybridisation. Hand-emasculation was required in the cross inasmuch as both species are self-fertilizing. The matermal plant after emasculation was baged with paternal one when they were grown side by side in a nursery planting. Reciprocal hybrids were obtained. All cytological observation were made on PMCMI. The chromosome pairing in hybrids showed that the hybrids were also tetraploid, but they had frequent meiotic irregularities and contained two more or less homologous genomes. Structural rearrangements were observed in hybrids which were totally sterile.
【Fund】: 国家自然科学基金
【CateGory Index】: S54
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