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GrainGenes Reference Report: GNM-43-1045

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Reference
GNM-43-1045
Title
Production and meiotic pairing behaviour of new hybrids of winter wheat (Triticum aestivum) x winter barley (Hordeum vulgare)
Journal
Genome
Year
2000
Volume
43
Pages
1045-1054
Author
Molnar-Lang M
Linc G
Logojan A
Sutka J
Abstract
Summary: New winter wheat (Triticum aestivum L.) x winter barley (Hordeum vulgare L.) hybrids produced using cultivated varieties (wheat 'Martonvasari 9 kr1'(Mv9 kr1) x barley 'Igri', Mv9 kr1 x 'Osnova', 'Asakazekomugi' x 'Manas') were multiplied in tissue culture because of the high degree of sterility and then pollinated with wheat to obtain backcross progenies. Meiotic analysis of the hybrids Mv9 kr1 x 'Igri' and 'Asakazekomugi' x 'Manas' and their in vitro regenerated progenies with the Feulgen method revealed 1.59 chromosome arm associations per cell in both initial hybrids. The number of chromosome arm associations increased after in vitro culture to 4.72 and 2.67, respectively, in the two combinations. According to the genomic in situ hybridization (GISH) analysis, wheat-barley chromosome arm associations made up 3.6% of the total in the initial Mv9 kr1 x 'Igri' hybrid and 6.6% and 16.5% of the total in in vitro regenerated progenies of the 'Asakazekomugi' x 'Manas' and Mv9 kr1 x 'Igri' hybrids, respectively. The demonstration by GISH of wheat-barley chromosome pairing in the hybrids and especially in their in vitro regenerated progenies proves the possibility of producing recombinants between these two genera, and thus of transferring useful characters from barley into wheat. In vitro conditions caused an increase in chromosome arm association frequency in both combinations and in fertility in some regenerants
Keyword
[ Hide all but 1 of 33 ]
backcross
barley
bread wheat
canada
cell
chromosome pairing
crossability
culture
fertility
genera
genomic in situ hybridization
gish
hordeum vulgare
hybrid
hybridization
in situ
in situ hybridization
in vitro
in vitro culture
intergeneric hybridization
meiotic analysis
meiotic chromosome pairing
meiotic pairing
method
progeny
regenerants
sterility
tissue
tissue culture
triticum aestivum
winter
winter barley
winter wheat

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