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GrainGenes Reference Report: CRS-40-256

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Reference	CRS-40-256
Title	Geographical distribution of a chromosome 7C and 17 intergenomic translocation in cultivated oat
Journal	Crop Science
Year	2000
Volume	40
Pages	256-263
Author	Jellen EN Beard J
Abstract	Summary: Previous cytogenetic and molecular genetic investigations have shown variation for the presence of intergenomic translocation segments on chromosomes 7C and 17 of common cultivated oat (Avena sativa L., 2n = 6x = 42) and red oat (A. byzantina K. Koch, 2n = 6x = 42). The objective of this work was to determine the geographic distribution of these translocation segments in 197 landraces and cultivars using C-banding. Genotypes were selected primarily on the basis of diversity of geographic origins, particularly within the Mediterranean-Near Eastern center. Eighty-nine percent of traditional A. byzantina-type accessions, mostly from the lowland Mediterranean basin and Indian subcontinent, were of the nontranslocation type. Ninety-seven percent of traditional A. sativa and hulless (A. sativa subsp. nuda) genotypes possessed the 7C-17 translocation (delta7C-17) segments. Presence or absence of the delta7C-17 was more loosely associated with spring vs. winter growth habit, but still highly significant. The results support the hypothesis that common cultivated oat and red oat are distinct races of the hexaploid biological species and were domesticated independently of one another
External Databases	https://doi.org/10.2135/cropsci2000.401256x
Germplasm	Ceirch Du Bach (oat) Clinton (oat) Coker 716 (oat)
Keyword	[ Hide all but 1 of 27 ] accessions avena avena byzantina avena sativa c banding chromosome translocation cytogenetics diversity domestication genetic variation genome analysis genotype geographic distribution growth habit hexaploid landrace mediterranean basin molecular genetics oat origin plant morphology provenance races spring translocation winter

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