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Quantitative trait analysis of seed yield and other complex traits in hybrid spring rapeseed (Brassica napus L.): 2. Identification of alleles from unadapted germplasm.
Theor Appl Genet. 2006 Aug; 113(4):597-609.TA

Abstract

Unadapted germplasm may contain alleles that could improve hybrid cultivars of spring oilseed Brassica napus. Quantitative trait loci (QTL) mapping was used to identify potentially useful alleles from two unadapted germplasm sources, a Chinese winter cultivar and a re-synthesized B. napus, that increase seed yield when introgressed into a B. napus spring hybrid combination. Two populations of 160 doubled haploid (DH) lines were created from crosses between the unadapted germplasm source and a genetically engineered male-fertility restorer line (P1804). A genetically engineered male-sterile tester line was used to create hybrids with each DH line (testcrosses). The two DH line populations were evaluated in two environments and the two testcross populations were evaluated in three or four environments for seed yield and other agronomic traits. Several genomic regions were found in the two testcross populations which contained QTL for seed yield. The map positions of QTL for days to flowering and resistance to a bacterial leaf blight disease coincided with QTL for seed yield and other agronomic traits, suggesting the occurrence of pleiotropic or linked effects. For two hybrid seed yield QTL, the favorable alleles increasing seed yield originated from the unadapted parents, and one of these QTL was detected in multiple environments and in both populations. In this QTL region, a chromosome rearrangement was identified in P1804, which may have affected seed yield.

Authors+Show Affiliations

Plant Breeding and Plant Genetics Program, and Department of Agronomy, University of Wisconsin, Madison, WI 53706, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

16767446

Citation

Udall, Joshua A., et al. "Quantitative Trait Analysis of Seed Yield and Other Complex Traits in Hybrid Spring Rapeseed (Brassica Napus L.): 2. Identification of Alleles From Unadapted Germplasm." TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, vol. 113, no. 4, 2006, pp. 597-609.
Udall JA, Quijada PA, Lambert B, et al. Quantitative trait analysis of seed yield and other complex traits in hybrid spring rapeseed (Brassica napus L.): 2. Identification of alleles from unadapted germplasm. Theor Appl Genet. 2006;113(4):597-609.
Udall, J. A., Quijada, P. A., Lambert, B., & Osborn, T. C. (2006). Quantitative trait analysis of seed yield and other complex traits in hybrid spring rapeseed (Brassica napus L.): 2. Identification of alleles from unadapted germplasm. TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, 113(4), 597-609.
Udall JA, et al. Quantitative Trait Analysis of Seed Yield and Other Complex Traits in Hybrid Spring Rapeseed (Brassica Napus L.): 2. Identification of Alleles From Unadapted Germplasm. Theor Appl Genet. 2006;113(4):597-609. PubMed PMID: 16767446.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Quantitative trait analysis of seed yield and other complex traits in hybrid spring rapeseed (Brassica napus L.): 2. Identification of alleles from unadapted germplasm. AU - Udall,Joshua A, AU - Quijada,Pablo A, AU - Lambert,Bart, AU - Osborn,Thomas C, Y1 - 2006/06/10/ PY - 2005/11/10/received PY - 2006/05/13/accepted PY - 2006/6/13/pubmed PY - 2006/10/20/medline PY - 2006/6/13/entrez SP - 597 EP - 609 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor. Appl. Genet. VL - 113 IS - 4 N2 - Unadapted germplasm may contain alleles that could improve hybrid cultivars of spring oilseed Brassica napus. Quantitative trait loci (QTL) mapping was used to identify potentially useful alleles from two unadapted germplasm sources, a Chinese winter cultivar and a re-synthesized B. napus, that increase seed yield when introgressed into a B. napus spring hybrid combination. Two populations of 160 doubled haploid (DH) lines were created from crosses between the unadapted germplasm source and a genetically engineered male-fertility restorer line (P1804). A genetically engineered male-sterile tester line was used to create hybrids with each DH line (testcrosses). The two DH line populations were evaluated in two environments and the two testcross populations were evaluated in three or four environments for seed yield and other agronomic traits. Several genomic regions were found in the two testcross populations which contained QTL for seed yield. The map positions of QTL for days to flowering and resistance to a bacterial leaf blight disease coincided with QTL for seed yield and other agronomic traits, suggesting the occurrence of pleiotropic or linked effects. For two hybrid seed yield QTL, the favorable alleles increasing seed yield originated from the unadapted parents, and one of these QTL was detected in multiple environments and in both populations. In this QTL region, a chromosome rearrangement was identified in P1804, which may have affected seed yield. SN - 0040-5752 UR - https://www.unboundmedicine.com/medline/citation/16767446/Quantitative_trait_analysis_of_seed_yield_and_other_complex_traits_in_hybrid_spring_rapeseed__Brassica_napus_L__:_2__Identification_of_alleles_from_unadapted_germplasm_ L2 - https://dx.doi.org/10.1007/s00122-006-0324-0 DB - PRIME DP - Unbound Medicine ER -