A novel strategy to map a locus associated with flowering time in canola (Brassica napus L.).

Yunming Long, Puying Zheng, James V Anderson, David P Horvath, Jinita Sthapit, Xuehui Li, Mukhlesur Rahman, Wun S Chao

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Article in Molecular genetics and genomics : MGG, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Yunming LongDepartment of Plant Sciences, North Dakota State University, Dept. 7670, PO Box 6050, Fargo, ND, 58108-6050, USA.

Puying ZhengDepartment of Plant Sciences, North Dakota State University, Dept. 7670, PO Box 6050, Fargo, ND, 58108-6050, USA.

James V AndersonUSDA/ARS, Weed and Insect Biology Research Unit, Edward T. Schafer Agricultural Research Center, 1616 Albrecht Blvd. N., Fargo, ND, 58102-2765, USA. james.v.anderson@usda.gov.ORCID http://orcid.org/0000-0002-1801-5767

David P HorvathUSDA/ARS, Weed and Insect Biology Research Unit, Edward T. Schafer Agricultural Research Center, 1616 Albrecht Blvd. N., Fargo, ND, 58102-2765, USA.

Jinita SthapitUSDA/ARS, Weed and Insect Biology Research Unit, Edward T. Schafer Agricultural Research Center, 1616 Albrecht Blvd. N., Fargo, ND, 58102-2765, USA.

Xuehui LiDepartment of Plant Sciences, North Dakota State University, Dept. 7670, PO Box 6050, Fargo, ND, 58108-6050, USA.

Mukhlesur RahmanDepartment of Plant Sciences, North Dakota State University, Dept. 7670, PO Box 6050, Fargo, ND, 58108-6050, USA.

Wun S ChaoUSDA/ARS, Weed and Insect Biology Research Unit, Edward T. Schafer Agricultural Research Center, 1616 Albrecht Blvd. N., Fargo, ND, 58102-2765, USA.

Funding

Agricultural Research Service 58-3060-8-007USDA-Agricultural Research Service 3060-21220-033-000D

6 · The paper itself

Abstract

Flowering time is an important agronomic trait for canola breeders, as it provides growers with options for minimizing exposure to heat stress during flowering and to more effectively utilize soil moisture. Plants have evolved various systems to control seasonal rhythms in reproductive phenology including an internal circadian clock that responds to environmental signals. In this study, we used canola cultivar 'Westar' as a recurrent parent and canola cultivar 'Surpass 400' as the donor parent to generate a chromosome segment substitution line (CSSL) and to map a flowering time locus on chromosome A10 using molecular marker-assisted selection. This CSSL contains an introgressed 4.6 mega-bases (Mb) segment (between 13 and 17.6 Mb) of Surpass 400, which substantially delayed flowering compared with Westar. To map flowering time gene(s) within this locus, eight introgression lines (ILs) were developed carrying a series of different lengths of introgressed chromosome A10 segments using five co-dominant polymorphic markers located at 13.5, 14.0, 14.5, 15.0, 15.5, and 16.0 Mb. Eight ILs were crossed with Westar reciprocally and flowering time of resultant 16 F

Indexed as

Brassica napusChromosome MappingFlowersQuantitative Trait LociChromosomes, PlantGenes, PlantGenetic MarkersPhenotypePlant BreedingGenetic MarkersCanolaFlowering timeGenome mappingIntrogression line

Identifiers

PMID39379673

DOI10.1007/s00438-024-02191-w

PMCPMC11461549

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