Morphological and cytological characteristics of some wheat x barley hybrids |
| |
Authors: | P. P. Jauhar |
| |
Affiliation: | (1) Northern Crop Science Laboratory, USDA-Agricultural Research Service, State University Station, 58105-5677 Fargo, ND, USA |
| |
Abstract: | As initial step in the transfer of dwarf bunt resistance from barley into wheat, the two cereal crops were hybridized. Using the wheat cultivars Fukuhokomugi and Chinese Spring (AABBDD genomes) as female parents and barley cultivar Luther (II genome) as male, we synthesized 9 euploid hybrids (2n = 4x = 28; ABDI genomes). The hybrids were vigorous, but highly sterile. Meiotic analyses of seven hybrids showed considerable variation in chromosome pairing. Of the hybrids involving Fukuhokomugi 3 had high pairing with a mean of 5.08–6.72 chiasmata per cell, while others had 2.16–3.52 chiasmata per cell. As many as 12 bivalents in some pollen mother cells would suggest at least some pairing between wheat and barley chromosomes. This level of homoeologous pairing, coupled with some, albeit low, female fertility of the F1 hybrids, could offer an opportunity for intergeneric gene transfers from barley into wheat and vice versa. |
| |
Keywords: | Bread wheat Barley Intergeneric hybrid Homoeologous chromosome pairing Gene transfer |
本文献已被 SpringerLink 等数据库收录! |
|