Novel molecular marker-assisted strategy for production of wheat-Leymus mollis chromosome addition lines.
Sci Rep
; 8(1): 16117, 2018 10 31.
Article
in En
| MEDLINE
| ID: mdl-30382155
ABSTRACT
Developing wheat-alien chromosome introgression lines to improve bread wheat's resistance to stresses, such as drought, salinity stress and diseases, requires reliable markers to identify and characterize the alien chromatins. Leymus mollis is a wild relative of bread wheat resistant to salinity and economically important diseases of wheat, but its genome sequence and cytological markers are not available. We devised a molecular marker-assisted strategy for L. mollis chromosome identification and applied it to produce 10 wheat-L. mollis chromosome addition lines. Using 47 L. racemosus genome polymorphic PCR markers and DArTseq genotyping, we distinguished the L. mollis chromosomes and differentiated disomic and monosomic lines by progeny test. DArTseq genotyping generated 14,530 L. mollis SNP markers and the chromosome-specific SNP markers were used to determine the homoeologous groups of L. mollis chromosomes in the addition lines. To validate the marker-based results, genomic in situ hybridization was applied to confirm the presence and cytological status of L. mollis chromosomes in the lines. This study demonstrates that adequate molecular markers allow the production and characterization of wheat-alien addition lines without in situ hybridization, which saves considerable time and effort.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Triticum
/
Chromosomes, Plant
/
Plant Breeding
Type of study:
Prognostic_studies
Language:
En
Journal:
Sci Rep
Year:
2018
Document type:
Article
Affiliation country:
Japón