title: Inheritance and quantitative trait locus analysis of low-light tolerance in cucumber (Cucumis sativus L.).
abstract: The low-light tolerance index was investigated in a set of 123 F2:3 lines during the seedling stage across 2 seasons, and the heredity of low-light tolerance was assessed via different ge-netic analysis methods. The results of the classical analysis showed that low-light tolerance is controlled by an additive-dominant poly-gene, and the polygenic inheritance rate of separate generations was >30%. In addition, 5 quantitative trait loci (QTLs) exhibited a low-light tolerance index across both seasons, including 2 QTLs (Llti1.1 and Llti1.2) on the 1st linkage group (variances of 6.0 and 9.5%) and 3 QTLs (Llti2.1, Llti2.1, and Llti2.1) on the 2nd linkage group (variances of 10.1-14.0%). The classical analysis method and QTL information on the heredity of low-light tolerance showed that it is controlled by several major genes and a mini-polygene. The results will facilitate the breeding of resistance to low-light stress in cucumber.
authors.affiliation: College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China.
authors.forename: D D
authors.initials: DD
authors.lastname: Li
authors.affiliation: College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China.
authors.forename: Z W
authors.initials: ZW
authors.lastname: Qin
authors.affiliation: College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China.
authors.forename: H
authors.initials: H
authors.lastname: Lian
authors.affiliation: College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China.
authors.forename: G B
authors.initials: GB
authors.lastname: Yu
authors.affiliation: College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Sheng
authors.affiliation: College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China.
authors.forename: F
authors.initials: F
authors.lastname: Liu
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics* / Q000528:radiation effects; D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000737:chemistry; D018553:Cucumis sativus / Q000235:genetics* / Q000254:growth & development / Q000528:radiation effects; D030541:Databases, Genetic; D017343:Genes, Plant; D008040:Genetic Linkage; D008027:Light; D020412:Multifactorial Inheritance; D010641:Phenotype; D000069600:Plant Breeding; D040641:Quantitative Trait Loci; D012621:Seasons; D036226:Seedlings