Meiotic pairing behaviour reveals differences in genomic constitution between Hystrix patula and other species of the genus Hystrix Moench (Poaceae, Triticeae) |
| |
Authors: | H-Q Zhang Y-H Zhou |
| |
Institution: | (1) Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan City, Sichuan, China, 611830 |
| |
Abstract: | Interspecific and intergeneric hybridizations were carried out to evaluate the genomic relationships among species of Hystrix Moench and to study the relationships between Hystrix species and Psathyrostachys huashanica Keng (2n=2x=14, Nsh). Meiotic pairing in hybrids of Hystrix duthiei ssp. duthiei × P. huashanica (2n=3x=21), Hystrix duthiei ssp. longearistata × P. huashanica (2n=3x=21) and H. patula × P. huashanica (2n=3x=21) averaged 5.18, 5.11 and 0.29 bivalents per cell, while H. patula × H. duthiei ssp. longearistata (2n=4x=28) averaged 25.36 univalents and 1.32 bivalents per cell, respectively. The results indicate that (i) H. duthiei ssp. duthiei and H. duthiei ssp. longearistata have one set of Ns genome from Psathyrostachys; (ii) H. patula has no Ns genome; (iii) genomes of H. duthiei ssp. duthiei and H. duthiei ssp. longearistata are non-homologous to those of H. patula. The genomic relationships between H. patula and other Hystrix species are also discussed. |
| |
Keywords: | Hystrix patula Hystrix duthiei ssp duthiei Hystrix duthiei ssp longearistata Psathyrostachys huashanica Triticeae hybrid meiosis genomic relationship |
本文献已被 SpringerLink 等数据库收录! |
|