title: QTL mapping of forage yield and forage yield component traits in Sorghum bicolor x S. sudanense.
abstract: The sorghum-sudangrass hybrid (Sorghum bicolor x S. sudanense) is an important forage crop. However, little is known about the genetic mechanisms related to forage yield and the 4 forage yield component traits in this forage crop. In this study, a linkage map was constructed with 124 assigned SSR markers using an F2 mapping population derived from the crossing of sorghum Tx623A and sudangrass Sa. Nine quantitative trait loci (QTLs) were detected for forage yield and the 4 forage yield component traits using inclusive composite interval mapping. Five fresh weight QTLs were identified and contributed >50% of the total phenotypic variance. Of these QTLs, all showed additive and dominant effects, but most exhibited mainly dominant effects. These results will provide useful information for improvements in sorghum-sudangrass hybrid breeding.
authors.affiliation: College of Agriculture, Anhui Science and Technology University, Fengyang, Anhui, China.
authors.forename: Y L
authors.initials: YL
authors.lastname: Liu
authors.affiliation: College of Agriculture, Anhui Science and Technology University, Fengyang, Anhui, China.
authors.forename: L H
authors.initials: LH
authors.lastname: Wang
authors.affiliation: College of Agriculture, Anhui Science and Technology University, Fengyang, Anhui, China.
authors.forename: J Q
authors.initials: JQ
authors.lastname: Li
authors.affiliation: College of Agriculture, Anhui Science and Technology University, Fengyang, Anhui, China qwzhan@163.com.
authors.forename: Q W
authors.initials: QW
authors.lastname: Zhan
authors.affiliation: College of Agriculture, Anhui Science and Technology University, Fengyang, Anhui, China.
authors.forename: Q
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: College of Agriculture, Anhui Science and Technology University, Fengyang, Anhui, China.
authors.forename: J F
authors.initials: JF
authors.lastname: Li
authors.affiliation: College of Agriculture, Anhui Science and Technology University, Fengyang, Anhui, China.
authors.forename: F F
authors.initials: FF
authors.lastname: Fan
mesh_terms: D000821:Animal Feed; D008040:Genetic Linkage; D005819:Genetic Markers; D006824:Hybridization, Genetic; D040641:Quantitative Trait Loci; D045868:Sorghum / Q000235:genetics*
chemical_list: D005819:Genetic Markers