title: Main Effect QTL with Dominance Determines Heterosis for Dynamic Plant Height in Upland Cotton.
abstract: Plant height, which shows dynamic development and heterosis, is a major trait affecting plant architecture and has an indirect influence on economic yield related to biological yield in cotton. In the present study, we carried out dynamic analysis for plant height and its heterosis by quantitative trait loci (QTL) mapping at multiple developmental stages using two recombinant inbred lines (RILs) and their backcross progeny. At the single-locus level, 47 QTL were identified at five developmental stages in two hybrids. In backcross populations, QTL identified at an early stage mainly showed partial effects and QTL detected at a later stage mostly displayed overdominance effects. At the two-locus level, we found that main effect QTL played a more important role than epistatic QTL in the expression of heterosis in backcross populations. Therefore, this study implies that the genetic basis of plant height heterosis shows dynamic character and main effect QTL with dominance determines heterosis for plant height in Upland cotton.
authors: Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
authors: Lianguang
authors: L
authors: Shang
authors: Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
authors: Lingling
authors: L
authors: Ma
authors: Institute of Cash Crops, Hubei Academy of Agricultural Sciences, Wuhan 430064, China.
authors: Yumei
authors: Y
authors: Wang
authors: Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
authors: Ying
authors: Y
authors: Su
authors: Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
authors: Xiaocui
authors: X
authors: Wang
authors: Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
authors: Yuhua
authors: Y
authors: Li
authors: Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
authors: Abdugheni
authors: A
authors: Abduweli
authors: Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
authors: Shihu
authors: S
authors: Cai
authors: Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, China.
authors: Fang
authors: F
authors: Liu
authors: Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, China.
authors: Kunbo
authors: K
authors: Wang
authors: Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China jinping_hua@cau.edu.cn.
authors: Jinping
authors: J
authors: Hua
mesh_terms: D003433:Crosses, Genetic; D005799:Genes, Dominant; D017343:Genes, Plant; D056726:Genetic Association Studies; D005838:Genotype; D003368:Gossypium / Q000235:genetics*; D006579:Heterozygote; D006823:Hybrid Vigor / Q000235:genetics*; D006824:Hybridization, Genetic; D010641:Phenotype; D040641:Quantitative Trait Loci; D019655:Quantitative Trait, Heritable
keywords: QTL; Upland cotton; backcross population; heterosis; plant height