Bread wheat x Agrotricum crosses as a source of immunity and resistance to the PAV strain of barley yellow dwarf luteovirus

Comeau, A.; Makkouk, K. M.; Ahmad, Feroz; Saint-Pierre, CA

doi:10.1051/agro:19940301

Cited by 15 publications

(26 citation statements)

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“…In the last four decades, the incorporation of alien genetic material from Thinopyrum into common wheat (Triticum aestivum L. em Thell., AABBDD genomes) through wide crosses has increased the genetic diversity in wheat for improvement of disease resistance, drought and salinity tolerance and other traits (Armstong, 1936;Dewey, 1960;Sharma et al, 1984Sharma et al, , 1995Pienaar, 1990;Comeau et al, 1994;Friebe et al, 1996;Chen et al, 1997). Gene transfer is usually realized through chromosome engineering, using wheat-Thinopyrum partial amphiploids or chromosome addition, substitution, or translocation lines obtained from wide hybridization (He et al, 1986;Fedak, 1999).…”

confidence: 99%

“…Perennial Triticeae species within Thinopyrum also contain excellent resistance genes to BYDV, WSMV and WCM, which are absent in wheat (Martin et al, 1976(Martin et al, , 1984Sharma et al, 1984;Friebe et al, 1996;Fedak et al, 1997). Many different resistant partial amphiploids derived from wheat × Thinopyrum hybrids have been developed in different laboratories across the world (Tsitsin, 1965;Cauderon, 1966;Cauderon et al, 1973, Sun, 1981Xin et al, 1988;Pienaar, 1990;Friebe et al, 1992b;Banks et al, 1993;Comeau et al, 1994;Larkin et al, 1995;Sharma et al, 1995;Chen et al, 1997Chen et al, , 1998aFedak et al, 2000). These amphiploids have been very valuable for the improvement of disease resistance in wheat (Table 1).…”

Section: Thinopyrum and Its Contribution In Wheat Improvementmentioning

confidence: 99%

“…OK7211542, derived from a hybrid between wheat and Th. ponticum proved to be one of the most resistant partial amphiploids to the PAV strain of BYDV (Comeau et al, 1994;Chen et al, 1998a). The wheatTh.…”

Section: Thinopyrum and Its Contribution In Wheat Improvementmentioning

confidence: 99%

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Detection of alien chromatin introgression from Thinopyrum into wheat using S genomic DNA as a probe – A landmark approach for Thinopyrum genome research

Chen¹

2005

Cytogenet Genome Res

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The introduction of alien genetic variation from the genus Thinopyrum through chromosome engineering into wheat is a valuable and proven technique for wheat improvement. A number of economically important traits have been transferred into wheat as single genes, chromosome arms or entire chromosomes. Successful transfers can be greatly assisted by the precise identification of alien chromatin in the recipient progenies. Chromosome identification and characterization are useful for genetic manipulation and transfer in wheat breeding following chromosome engineering. Genomic in situ hybridization (GISH) using an S genomic DNA probe from the diploid species Pseudoroegneria has proven to be a powerful diagnostic cytogenetic tool for monitoring the transfer of many promising agronomic traits from Thinopyrum. This specific S genomic probe not only allows the direct determination of the chromosome composition in wheat-Thinopyrum hybrids, but also can separate the Th. intermedium chromosomes into the J, J^S and S genomes. The J^S genome, which consists of a modified J genome chromosome distinguished by S genomic sequences of Pseudoroegneria near the centromere and telomere, carries many disease and mite resistance genes. Utilization of this S genomic probe leads to a better understanding of genomic affinities between Thinopyrum and wheat, and provides a molecular cytogenetic marker for monitoring the transfer of alien Thinopyrum agronomic traits into wheat recipient lines.

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confidence: 99%

Section: Thinopyrum and Its Contribution In Wheat Improvementmentioning

confidence: 99%

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Detection of alien chromatin introgression from Thinopyrum into wheat using S genomic DNA as a probe – A landmark approach for Thinopyrum genome research

Chen¹

2005

Cytogenet Genome Res

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“…Larkin et al (1995) reported that out of the disomic alien addition lines isolated from a partial amphiploid (2n = 56) of wheat x T. intermedium, one was resistant to BYDV, and one to leaf, stem and stripe rusts. In the study of Comeau et al (1994), Agrotricum (Agropyron x Triticum) line OK211542 (2n = 56) was immune to BYDV. Through a selection for BYDV and threshable phenotype with wheat-like seed, F7-derived lines were obtained which were immune to BYDV with 44 somatic chromosomes.…”

Section: Resultsmentioning

confidence: 99%

“…Through a selection for BYDV and threshable phenotype with wheat-like seed, F7-derived lines were obtained which were immune to BYDV with 44 somatic chromosomes. The low frequency of expression of immunity suggested that more than one gene was required for full expression of resistance (Comeau et al 1994). Ander- (1998) have shown that the full BYDV resistance of T. intermedium was not realized in the wheat-T. intermedium chromosome substitution line P29 for group 7 chromosome developed by Sharma et al (1997b).…”

Section: Resultsmentioning

confidence: 99%

Resistance to barley yellow dwarf virus, powdery mildew and leaf rust in wheat x Thinopyrum backcrosses

Sharma

Ohm

Shaner

2004

phyto

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Wheat (Triticumaestivum) relatives are sources of useful genes for disease resistance. Chromosomally segregating populations of intergeneric hybrids between wheat and its distantly related species provide opportunity to study and introgress multiple disease resistance. While introgressing resistance to barley yellow dwarf virus (BYDV) from Thinopyrum into wheat, which is susceptible to BYDV, we scored powdery mildew (Erysiphaegraminis) and leaf rust (Pucciniatriticina) resistance, and chromosome numbers in second and third backcrosses (BC2 and BC3) of intergeneric hybrids of wheat with Thinopyrum ponticum and Thinopyrumintermedium. The frequency of multiple resistance to all the three diseases was low or became low when selection was applied for BYDV resistance and low chromosome numbers. Selection for fewer alien chromosomes while maintaining BYDV resistance was more effective in wheat x T. intermedium than in the wheat x T. ponticum cross. Mean chromosome numbers were significantly different in BC3 generation between BYDV resistant and susceptible plants in both crosses. Significant negative correlations between chromosome numbers and enzyme-linked immunosorbent assay (ELISA) values showed that as the critical Thinopyrum chromosome(s) were eliminated, susceptibility to BYDV increased. Results indicated that it is unlikely that genes for full resistance to all three diseases can be transferred simultaneously from Thinopyrum to wheat.Les espèces proches du blé (Triticumaestivum) sont à l’origine de gènes utiles pour la résistance aux maladies. Les populations à ségrégation chromosomique d’hybrides intergénériques entre le blé et des espèces peu apparentées nous offrent la chance de procéder à l’étude et à l’introgression de la multirésistance aux maladies. Alors que nous introgressions la résistance au virus de la jaunisse nanisante de l’orge (BYDV) de Thinopyrum dans le blé, qui est sensible au BYDV, nous avons coté la résistance à l’oïdium (Erysiphaegraminis) et à la rouille des feuilles (Pucciniatriticina), et compté le nombre de chromosomes dans les deuxième et troisième rétrocroisements (BC2 et BC3) d’hybrides intergénériques entre le blé et le Thinopyrum ponticum ou le Thinopyrumintermedium. Le taux de multirésistance aux trois maladies était bas ou est devenu bas lorsqu’une sélection a été faite pour la résistance au BYDV et pour un faible nombre de chromosomes. La sélection pour un plus faible nombre de chromosomes étrangers tout en maintenant la résistance au BYDV a été plus efficace pour le croisement de blé x T. intermedium que pour celui de blé x T. ponticum. À la génération du BC3, pour les deux croisements, le nombre moyen de chromosomes était significativement différent entre les plantes résistantes et celles sensibles au BYDV. Des corrélations négatives significatives entre le nombre de chromosomes et les valeurs du test immunoenzymatique ELISA ont démontré qu’à mesure que le ou les chromosomes déterminants du Thinopyrum étaient éliminés, la sensibilité au BYDV augmentait. Les résultats montrent q...

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Accelerated Breeding: Dream or Reality?

Comeau

Caetano

St-Pierre

et al. 2001

Wheat in a Global Environment

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Bread wheat x Agrotricum crosses as a source of immunity and resistance to the PAV strain of barley yellow dwarf luteovirus

Cited by 15 publications

References 8 publications

Detection of alien chromatin introgression from <i>Thinopyrum</i> into wheat using S genomic DNA as a probe – A landmark approach for <i>Thinopyrum</i> genome research

Detection of alien chromatin introgression from <i>Thinopyrum</i> into wheat using S genomic DNA as a probe – A landmark approach for <i>Thinopyrum</i> genome research

Resistance to barley yellow dwarf virus, powdery mildew and leaf rust in wheat x Thinopyrum backcrosses

Accelerated Breeding: Dream or Reality?

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