title: Flowering time quantitative trait Loci analysis of oilseed brassica in multiple environments and genomewide alignment with Arabidopsis.
abstract: Most agronomical traits exhibit quantitative variation, which is controlled by multiple genes and are environmentally dependent. To study the genetic variation of flowering time in Brassica napus, a DH population and its derived reconstructed F(2) population were planted in 11 field environments. The flowering time varied greatly with environments; 60% of the phenotypic variation was attributed to genetic effects. Five to 18 QTL at a statistically significant level (SL-QTL) were detected in each environment and, on average, two new SL-QTL were discovered with each added environment. Another type of QTL, micro-real QTL (MR-QTL), was detected repeatedly from at least 2 of the 11 environments; resulting in a total of 36 SL-QTL and 6 MR-QTL. Sixty-three interacting pairs of loci were found; 50% of them were involved in QTL. Hundreds of floral transition genes in Arabidopsis were aligned with the linkage map of B. napus by in silico mapping; 28% of them aligned with QTL regions and 9% were consistent with interacting loci. One locus, BnFLC10, in N10 and a QTL cluster in N16 were specific to spring- and winter-cropped environments respectively. The number of QTL, interacting loci, and aligned functional genes revealed a complex genetic network controlling flowering time in B. napus.
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China.
authors: Y
authors: Y
authors: Long
authors: J
authors: J
authors: Shi
authors: D
authors: D
authors: Qiu
authors: R
authors: R
authors: Li
authors: C
authors: C
authors: Zhang
authors: J
authors: J
authors: Wang
authors: J
authors: J
authors: Hou
authors: J
authors: J
authors: Zhao
authors: L
authors: L
authors: Shi
authors: Beom-Seok
authors: BS
authors: Park
authors: S R
authors: SR
authors: Choi
authors: Y P
authors: YP
authors: Lim
authors: J
authors: J
authors: Meng
mesh_terms: D017360:Arabidopsis / Q000235:genetics*; D029688:Brassica napus / Q000235:genetics*; D002874:Chromosome Mapping; D019295:Computational Biology; D018556:Crops, Agricultural; D030561:Databases, Nucleic Acid; D004777:Environment; D035264:Flowers / Q000235:genetics*; D053263:Gene Regulatory Networks; D014644:Genetic Variation; D018745:Genome, Plant; D040641:Quantitative Trait Loci; D012621:Seasons