Participation of Wild Species Genus <i>Avena</i> L. (Poaceae) of Different Ploidy in the Origin of Cultivated Species According to Data on Intragenomic Polymorphism of the ITS1-5.8S rRNA Region

Participation of Wild Species Genus <i>Avena</i> L. (Poaceae) of Different Ploidy in the Origin of Cultivated Species According to Data on Intragenomic Polymorphism of the ITS1-5.8S rRNA Region

The possible origin of four cultivated species of the genus <i>Avena</i> of different ploidy and different subgenome composition (<i>A. strigosa</i>, <i>A. abyssinica</i>, <i>A. byzantina</i>, and <i>A. sativa</i>) from possible wild specie...

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Bibliographic Details
Main Authors:	Alexander A. Gnutikov, Nikolai N. Nosov, Igor G. Loskutov, Alexander V. Rodionov, Victoria S. Shneyer
Format:	Article
Language:	English
Published:	MDPI AG 2025-05-01
Series:	Plants
Subjects:	cereals domestication genome combinations grasses hybridization molecular phylogeny
Online Access:	https://www.mdpi.com/2223-7747/14/10/1550
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Summary:	The possible origin of four cultivated species of the genus <i>Avena</i> of different ploidy and different subgenome composition (<i>A. strigosa</i>, <i>A. abyssinica</i>, <i>A. byzantina</i>, and <i>A. sativa</i>) from possible wild species was investigated. The region of the internal transcribed spacer ITS1 and the 5.8S rRNA gene in the cultivated species was studied with next-generation sequencing (NGS), and the patterns of occurrence and distribution of the ribotypes were compared among them and with those of the wild species. According to these data diploid, <i>A. strigosa</i> is more closely related to the diploid <i>A. hirtula</i> than to polyploid oats, and it could have evolved independently of polyploid cultivated species. The tetraploid <i>Avena abyssinica</i> could be a cultivated derivative of <i>A. vaviloviana</i>. Two hexaploid cultivated species, <i>A. byzantina</i> and <i>A. sativa</i>, could have a different origin; <i>A. sativa</i> could be the cultivated form of <i>A. fatua</i>, whereas <i>A. byzantina</i> could originate independently. It was found that the oat species with the A and C subgenomes, even with strong morphological and karyological differences, could intercross and pass the further stages of introgression producing a new stable combination of genomes. Our data show that almost all species of <i>Avena</i> could form an introgressive interspecies complex.
ISSN:	2223-7747