A Phylogenetic Analysis Based on Nucleotide Sequence of a Marker Linked to the Brittle Rachis Locus Indicates a Diphyletic Origin of Barley
| Autor: | Perumal Azhaguvel, Takao Komatsuda |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Crops
Agricultural Genetic Markers Locus (genetics) Plant Science Biology Genes Plant domestication Phylogenetics evolution Botany var. agriocrithon btr1 btr2 Domestication Flowering Tops wild barley Phylogeny Hordeum vulgare Genetics Polymorphism Genetic Phylogenetic tree cultivated barley Nucleic acid sequence Agriculture Hordeum Sequence Analysis DNA Articles biology.organism_classification Genetic marker weedy barley |
| Zdroj: | Annals of Botany |
| ISSN: | 1095-8290 0305-7364 |
| Popis: | †Background and Aims Barley (Hordeum vulgare ssp. vulgare) cultivation started between 9500 and 8400 years ago, and was a major part of ancient agriculture in the Near East. The brittle rachis is a critical trait in the domestication process. †Methods A DNA sequence closely linked to the brittle rachis complex was amplified and resequenced in a collection of cultivated barleys, wild barleys (H. vulgare ssp. spontaneum) and weedy brittle rachis varieties (H. vulgare ssp. vulgare var. agriocrithon). The sequence was used to construct a phylogenetic tree. †Key Results The phylogeny separated the W- (btr1-carrying) from the E- (btr2-carrying) cultivars. The wild barleys had a high sequence diversity and were distributed throughout the W- and E-clades. Some of the Tibetan var. agriocrithon lines were closely related to the E-type and others to the W-type cultivated barleys, but an Israeli var. agriocrithon line has a complex origin. †Conclusions The results are consistent with a diphyletic origin of barley. The W- and E-type cultivars are assumed to have evolved from previously diverged wild barley via independent mutations at Btr1 and Btr2. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|