Analysis of hybrids of durum wheat with Thinopyrum junceiforme using RAPD markers
Identifieur interne : 003D93 ( Main/Exploration ); précédent : 003D92; suivant : 003D94Analysis of hybrids of durum wheat with Thinopyrum junceiforme using RAPD markers
Auteurs : V. R. Bommineni [États-Unis] ; P. P. Jauhar [États-Unis] ; T. S. Peterson [États-Unis] ; R. N. Chibbar [États-Unis] ; A. B. Almouslem [États-Unis]Source :
- Theoretical and Applied Genetics [ 0040-5752 ] ; 1997-10-01.
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Abstract
Abstract: The objective of this study was to detect the presence of alien chromatin in intergeneric hybrids of durum wheat (Triticum turgidum, 2n=4x=28; AABB genomes) with the perennial grass Thinopyrum junceiforme (2n=4x=28; J1J1J2J2) using RAPD markers. The first step was to identify amplification of species-specific DNA markers in the parental grass species and durum wheat cultivars. Initially, the genomic DNA of five grass species (Thinopyrum junceiforme, Th. bessarabicum, Lophopyrum elongatum, Leymus karataviensis and Elytrigia pycnantha) and selected durum cultivars (‘Langdon’, ‘Durox’, ‘Lloyd’, ‘Monroe’, and ‘Medora’) was screened with 40 oligonucleotide primers (nano-mers). Three oligonucleotides that amplified DNA fragments specific to a grass species or to a durum cultivar were identified. Primer PR21 amplified DNA fragments specific to each of the five durum cultivars, and primers PR22 and PR23 amplified fragments specific to each of the grass species. Intergeneric hybrids between the durum cultivars ‘Langdon’, ‘Lloyd’ and ‘Durox’ and Th. junceiforme, and their backcross (BC) progeny were screened with all 40 primers. Six primers amplified parent-specific DNA fragments in the F1 hybrids and their BC1 progeny. Three primers, PR22, PR23 and PR41, that amplified Th. junceiforme DNA fragments in both F1 and BC1 were further analyzed. The presence of an amplified 1.7-kb Th. junceiforme DNA fragment in the F1 hybrids and BC1 progeny was confirmed using Southern analysis by hybridization with both Th. junceiforme genomic DNA and Th. junceiforme DNA amplified with primer PR41. With the exception of line BC1F2 no. 5, five selfed progeny of BC1 and a BC2 of line 3 (BC1F2 no. 3בLloyd’) from a cross of ‘Lloyd’×Th. junceiforme showed the presence of the 1.7-kb DNA fragment. All selfed BC1 and BC2 lines retained the 600-bp fragment that was confirmed after hybridization with Th. junceiforme DNA amplified with primer PR22. Other experiments using RFLP markers also showed the presence of up to seven Th. junceiforme DNA fragments in the F1 hybrids and their BC progeny after hybridization with Th. junceiforme DNA amplified with primer PR41. These studies show the usefulness of molecular markers in detecting alien chromatin/DNA fragments in intergeneric hybrids with durum wheat.
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DOI: 10.1007/s001220050622
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Peterson</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant Sciences, North Dakota State University, Fargo, ND 58105-5167, USA</wicri:regionArea><wicri:noRegion>USA</wicri:noRegion></affiliation></author><author><name sortKey="Chibbar, R N" sort="Chibbar, R N" uniqKey="Chibbar R" first="R. N." last="Chibbar">R. N. Chibbar</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>N.R.C.C., Plant Biotechnology Institute, Saskatoon, SK, Canada S7N 0W9</wicri:cityArea></affiliation></author><author><name sortKey="Almouslem, A B" sort="Almouslem, A B" uniqKey="Almouslem A" first="A. B." last="Almouslem">A. B. 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The first step was to identify amplification of species-specific DNA markers in the parental grass species and durum wheat cultivars. Initially, the genomic DNA of five grass species (Thinopyrum junceiforme, Th. bessarabicum, Lophopyrum elongatum, Leymus karataviensis and Elytrigia pycnantha) and selected durum cultivars (‘Langdon’, ‘Durox’, ‘Lloyd’, ‘Monroe’, and ‘Medora’) was screened with 40 oligonucleotide primers (nano-mers). Three oligonucleotides that amplified DNA fragments specific to a grass species or to a durum cultivar were identified. Primer PR21 amplified DNA fragments specific to each of the five durum cultivars, and primers PR22 and PR23 amplified fragments specific to each of the grass species. Intergeneric hybrids between the durum cultivars ‘Langdon’, ‘Lloyd’ and ‘Durox’ and Th. junceiforme, and their backcross (BC) progeny were screened with all 40 primers. Six primers amplified parent-specific DNA fragments in the F1 hybrids and their BC1 progeny. Three primers, PR22, PR23 and PR41, that amplified Th. junceiforme DNA fragments in both F1 and BC1 were further analyzed. The presence of an amplified 1.7-kb Th. junceiforme DNA fragment in the F1 hybrids and BC1 progeny was confirmed using Southern analysis by hybridization with both Th. junceiforme genomic DNA and Th. junceiforme DNA amplified with primer PR41. With the exception of line BC1F2 no. 5, five selfed progeny of BC1 and a BC2 of line 3 (BC1F2 no. 3בLloyd’) from a cross of ‘Lloyd’×Th. junceiforme showed the presence of the 1.7-kb DNA fragment. All selfed BC1 and BC2 lines retained the 600-bp fragment that was confirmed after hybridization with Th. junceiforme DNA amplified with primer PR22. Other experiments using RFLP markers also showed the presence of up to seven Th. junceiforme DNA fragments in the F1 hybrids and their BC progeny after hybridization with Th. junceiforme DNA amplified with primer PR41. These studies show the usefulness of molecular markers in detecting alien chromatin/DNA fragments in intergeneric hybrids with durum wheat.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Californie</li></region></list><tree><country name="États-Unis"><noRegion><name sortKey="Bommineni, V R" sort="Bommineni, V R" uniqKey="Bommineni V" first="V. R." last="Bommineni">V. R. Bommineni</name></noRegion><name sortKey="Almouslem, A B" sort="Almouslem, A B" uniqKey="Almouslem A" first="A. B." last="Almouslem">A. B. Almouslem</name><name sortKey="Chibbar, R N" sort="Chibbar, R N" uniqKey="Chibbar R" first="R. N." last="Chibbar">R. N. Chibbar</name><name sortKey="Jauhar, P P" sort="Jauhar, P P" uniqKey="Jauhar P" first="P. P." last="Jauhar">P. P. Jauhar</name><name sortKey="Peterson, T S" sort="Peterson, T S" uniqKey="Peterson T" first="T. S." last="Peterson">T. S. 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