Synaptic behaviour of hexaploid wheat haploids with different effectiveness of the diploidizing mechanism |
| |
Authors: | Martinez M Cuadrado C Laurie D A Romero C |
| |
Institution: | Departamento de Genética, Facultad de Ciencias Biológicas, Universidad Complutense, Madrid, Spain. |
| |
Abstract: | Haploids of three cultivars of Triticum aestivum (Thatcher, Chris, and Chinese Spring) were obtained from crosses with Zea mays. The level of chromosome pairing at metaphase I and the synaptic behaviour at prophase I was studied. There were differences in the meiotic behaviour of the haploids from different cultivars. Thatcher and Chris haploids had significantly higher levels of pairing at metaphase I than Chinese Spring haploids. This metaphase I pairing was correlated with higher levels of synapsis achieved in the Thatcher and Chris prophase I nuclei than in the Chinese Spring nuclei. Variation in the effectiveness of the diploidizing mechanism among cultivars of wheat is proposed to have a genetic origin and the role of the Ph1 locus in the different haploids is discussed. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|