A compendium of reciprocal intervarietal translocations in hexaploid wheat

Schlegel, G.; Schlegel, R.

doi:10.1007/bf01984613

Cited by 23 publications

(13 citation statements)

References 15 publications

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“…Thirty fi ve variants of chromosomal rearrangements and/or wheat-alien introgression are identifi ed in 112 out of 295 common wheat cultivars. Translocation T5B:7B is the most widespread, being found in 25 cultivars studied and in at least 16 other cultivars described in literature (Friebe and Gill 1994 ;Schlegel 1996 ). (Friebe et al 1996 ;Schneider et al 2008 ).…”

Section: Abstract C-banding • Chromosomes • Domestication • Evolutionmentioning

confidence: 82%

Chromosomal Changes over the Course of Polyploid Wheat Evolution and Domestication

Бадаева

Dedkova

Pukhalskyi

et al. 2015

Advances in Wheat Genetics: From Genome to Field

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Polyploid wheats are represented by two evolutionary lineages -Emmer and Timopheevi. It was reported that the species of these groups differentiated by species-specifi c translocations; they showed distinct karyotype structures, i.e., the amount and the distribution of heterochromatin. Analysis of more than 1,500 accessions representing 21 wild and cultivated polyploid wheat species using C-banding revealed that intra-and interspecifi c divergence within these two groups was accompanied by chromosomal rearrangements. Intraspecifi c diversity was the highest for wild species, followed by landraces and commercial cultivars. Chromosomal rearrangements were more frequent in T. araraticum than in T. dicoccoides (55.7 % and 35.3 % correspondingly) . Altogether, 2 pericentric inversions, 28 single translocations, 13 double translocations, and fi ve multiple translocations were identifi ed in 150 of 270 T. araraticum accessions. Sixty types of chromosomal rearrangements (4 inversions, 37 single translocations, 11 double and 6 triple translocations, and two unclassifi ed rearrangements) were found in T. dicoccoides (143 of 400 accessions). The range of karyotype diversity decreased in cultivated Emmer: 25 single translocations, 4 pericentric inversions, 6 double and 3 multiple translocations were detected in 119 of 470 accessions (24.5 %). The translocation T5B:7A signifi cantly dominated over other variants; alone or in combination with other translocations, being identifi ed in 51 lines of T. dicoccum (Schrank) Schübler, preferentially from Western Europe and Mediterranean countries. Chromosomal rearrangements were also found in common wheat, the translocations T5B:7B and wheat-rye T1RS:1BL being the most frequent (25 and 29 cultivars respectively). In addition to them, 24 variants of chromosomal rearrangements, including inversions, single and multiple translocations and wheat-alien translocations and substitutions were discovered in 112 of 295 cultivars we studied.

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Section: Abstract C-banding • Chromosomes • Domestication • Evolutionmentioning

confidence: 82%

Chromosomal Changes over the Course of Polyploid Wheat Evolution and Domestication

Бадаева

Dedkova

Pukhalskyi

et al. 2015

Advances in Wheat Genetics: From Genome to Field

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“…Reciprocal wheat-wheat translocations involving whole chromosome arms are pretty common in wheat cultivars as well as in wheat-alien germplasm (Schlegel & Schlegel, 1989) . However, this is the first report of translocations involving chromosomes IB and 2B .…”

Section: Resultsmentioning

confidence: 99%

Karyological characterization of a partial amphiploid, Triticum turgidum L. var. durum × Agropyron intermedium (Host) P.B.

Schulz-Schaeffer

Friebe

1992

Euphytica

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A Giemsa-C-banded karyotype of a partial amphiploid, Triticum turgidum L . var. durum cv . 'Nodak' x Agropyron intermedium (Host) P.B ., called MT-2, was analyzed . MT-2 is a winterhardy grasslike octoploid germplasm which survived 5 winters in Montana, and its seed weight is 3 times that of A . intermedium seed . The MT-2 C-banding karyotype shows 6 chromosome pairs each of the A and B wheat genomes with 3A and 4B missing . Chromosomes 1B and 2B are involved in a reciprocal homozygous translocation (T1BS •2BS, T1BL •2BL) which was also confirmed by a nucleolus-associated quadrivalent in an MT-2 X durum wheat backcross. In addition to the wheat chromosomes, MT-2 consistently shows 16 A . intermedium chromosome pairs which are designated from A to P . These chromosomes show C-banding patterns similar to those reported earlier in the literature . A large amount of C-banding polymorphism and structural rearrangements in A . intermedium itself presently make a definite chromosome assignment to the homeologous groups of the Triticeae difficult . The data presented are crucial for further directed manipulation of this germplasm aimed at producing valuable chromosome additions and substitutions in wheat .

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“…The existence of evolutionary translocations as opposed to varietal translocations (SCHLEGEL and SCHLEGEL 1989) was first revealed in wheat by the detailed cytological studies of NARANJO and colleagues (1987), who used differential C-banding patterns to recognize individual wheat chromosome pairing patterns in the absence of the Phl gene. These results were later confirmed and extended by GALE and colleagues (see DEVOS et al 1995), using comparative mapping with molecular probes.…”

Section: Nomenclature Of Wheat Chromosomesmentioning

confidence: 99%

Untitled

1997

Hereditas

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A compendium of reciprocal intervarietal translocations in hexaploid wheat

Cited by 23 publications

References 15 publications

Chromosomal Changes over the Course of Polyploid Wheat Evolution and Domestication

Chromosomal Changes over the Course of Polyploid Wheat Evolution and Domestication

Karyological characterization of a partial amphiploid, Triticum turgidum L. var. durum × Agropyron intermedium (Host) P.B.

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