GrainGenes Reference Report: GNM-42-374
Reference
GNM-42-374
Title
Development and identification of a complete set of Triticum aestivum Aegilops geniculata chromosome addition lines.
Journal
Genome
Year
1999
Volume
42
Pages
374-380
Author
Friebe BR Tuleen NA Gill BS
Abstract
The production and identification of a complete set of intact Aegilops geniculata chromosome and telosome additions to common wheat is described. All U(g) and M(g) genome chromosomes were tentatively assigned to their homoeologous groups based on C-banding, meiotic metaphase I pairing analyses and plant morphologies. Thirteen disomic and one monosomic wheat-Ae. geniculata chromosome additions were identified. Furthermore, two monotelosomic (MtA7U(g)L, MtA7M(g)L) and nine ditelosomic (DtA1U(g)S, DtA1U(g)L, DtA2U(g)S, DtA1M(g)L, DtA2M(g)L, DtA3M(g)S, DtA5M(g)S, DtA6M(g)L, DtA7M(g)S) wheat-Ae. geniculata additions were recovered. C-banding and meiotic pairing analyses revealed that all added U(g) and M(g) genome chromosomes are structurally unaltered compared to the Ae. geniculata parent accession. Chromosome 4M(g) has a strong gametocidal gene that, when transferred to wheat, causes extensive chromosome breakage mainly in gametes lacking it. The relationships of Ae. geniculata chromosomes with those of the diploid progenitor species and derived polyploids is discussed.
Keyword
[ Hide all but 1 of 13 ] addition lines aegilops chromosome pairing development diploidy evolution gametes intergeneric hybridization karyotype meiosis plant morphology triticum aestivum wild relatives
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: GNM-42-374
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||