Early evolution of the chromosomal structure of Triticum turgidum–Aegilops ovata amphiploids carrying and lacking the Ph1 gene

2001 ◽  
Vol 103 (8) ◽  
pp. 1123-1128 ◽  
Author(s):  
E. Benavente ◽  
K. Alix ◽  
J.-C. Dusautoir ◽  
J. Orellana ◽  
J. L. David
Keyword(s):  
Triticum Turgidum ◽  
Early Evolution ◽  
Chromosomal Structure ◽  
Ph1 Gene

scholarly journals Chromosome instability in intergeneric hybrids of Triticum aestivum× tritordeum (amphiploid Hordeum chilense×Triticum turgidum) with high dosage of Ph1 gene of wheat

Hereditas ◽  
2008 ◽  
Vol 114 (3) ◽  
pp. 271-276
Author(s):  
R. VIEIRA ◽  
T. MELLO-SAMPAYO ◽  
A. QUEIROZ ◽  
L. MORAIS ◽  
W. S. VIEGAS
Keyword(s):  
Triticum Aestivum ◽  
Triticum Turgidum ◽  
Chromosome Instability ◽  
Intergeneric Hybrids ◽  
Hordeum Chilense ◽  
Ph1 Gene

Genotypic variation in tetraploid wheat affecting homoeologous pairing in hybrids with Aegilops peregrina

Genome ◽  
2001 ◽  
Vol 44 (6) ◽  
pp. 1000-1006 ◽  
Author(s):  
Hakan Ozkan ◽  
Moshe Feldman
Keyword(s):  
Triticum Turgidum ◽  
Genotypic Variation ◽  
Tetraploid Wheat ◽  
Homoeologous Pairing ◽  
Meiotic Behavior ◽  
Polyploid Wheat ◽  
Chromosome 5B ◽  
Geographical Regions ◽  
Chromosome Arm ◽  
Ph1 Gene

The Ph1 gene has long been considered the main factor responsible for the diploid-like meiotic behavior of polyploid wheat. This dominant gene, located on the long arm of chromosome 5B (5BL), suppresses pairing of homoeologous chromosomes in polyploid wheat and in their hybrids with related species. Here we report on the discovery of genotypic variation among tetraploid wheats in the control of homoeologous pairing. Compared with the level of homoeologous pairing in hybrids between Aegilops peregrina and the bread wheat cultivar Chinese Spring (CS), significantly higher levels of homoeologous pairing were obtained in hybrids between Ae. peregrina and CS substitution lines in which chromosome 5B of CS was replaced by either 5B of Triticum turgidum ssp. dicoccoides line 09 (TTD09) or 5G of Triticum timopheevii ssp. timopheevii line 01 (TIM01). Similarly, a higher level of homoeologous pairing was found in the hybrid between Ae. peregrina and a substitution line of CS in which chromosome arm 5BL of line TTD140 substituted for 5BL of CS. It appears that the observed effect on the level of pairing is exerted by chromosome arm 5BL of T. turgidum ssp. dicoccoides, most probably by an allele of Ph1. Searching for variation in the control of homoeologous pairing among lines of wild tetraploid wheat, either T. turgidum ssp. dicoccoides or T. timopheevii ssp. armeniacum, showed that hybrids between Ae. peregrina and lines of these two wild wheats exhibited three different levels of homoeologous pairing: low, low intermediate, and high intermediate. The low-intermediate and high-intermediate genotypes may possess weak alleles of Ph1. The three different T. turgidum ssp. dicoccoides pairing genotypes were collected from different geographical regions in Israel, indicating that this trait may have an adaptive value. The availability of allelic variation at the Ph1 locus may facilitate the mapping, tagging, and eventually the isolation of this important gene.Key words: diploid-like meiotic behavior, genetic control of pairing, Ph1 gene, Triticum turgidum ssp. dicoccoides, wild emmer.

À propos d'essais de croisements entre Triticum timopheevi et Triticum turgidum compositum

1955 ◽  
Vol 24 (10) ◽  
pp. 235-241
Author(s):  
Claude-Charles Mathon ◽  
M. Stroun
Keyword(s):  
Triticum Turgidum ◽  
Triticum Timopheevi

Molecular Mapping of Powdery Mildew Resistance Gene MlWE18 in Wheat Originated from Wild Emmer (Triticum turgidum var. dicoccoides)

2009 ◽  
Vol 35 (10) ◽  
pp. 1791-1797 ◽  
Author(s):  
Jun HAN ◽  
Lian-Song ZHANG ◽  
Gen-Qiao LI ◽  
Hong-Tao ZHANG ◽  
Chao-Jie XIE ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Resistance Gene ◽  
Powdery Mildew Resistance ◽  
Molecular Mapping ◽  
Triticum Turgidum ◽  
Wild Emmer ◽  
Powdery Mildew Resistance Gene ◽  
Mildew Resistance

Chromosome Location and Molecular Mapping of Powdery Mildew Resistance Gene PmAS846 Originated from Wild Emmer (Triticum turgidum var. dicoccoides)

2013 ◽  
Vol 38 (4) ◽  
pp. 589-595
Author(s):  
Fei XUE ◽  
Chang-You WANG ◽  
Li-Hua ZHANG ◽  
Hong ZHANG ◽  
Hao LI ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Resistance Gene ◽  
Powdery Mildew Resistance ◽  
Molecular Mapping ◽  
Triticum Turgidum ◽  
Wild Emmer ◽  
Chromosome Location ◽  
Powdery Mildew Resistance Gene ◽  
Mildew Resistance

Allelic Variations of Phytoene Synthase Genes Controlling Yellow Pigment Content in Durum Wheat (Triticum turgidum L.)

2011 ◽  
Vol 37 (5) ◽  
pp. 924-928
Author(s):  
Hui-Juan GUO ◽  
Feng CHEN ◽  
Zhong-Dong DONG ◽  
Dang-Qun CUI
Keyword(s):  
Durum Wheat ◽  
Triticum Turgidum ◽  
Yellow Pigment ◽  
Pigment Content ◽  
Phytoene Synthase ◽  
Yellow Pigment Content ◽  
Allelic Variations
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