T1 locus in cotton is the candidate gene affecting lint percentage, fiber quality and spiny bollworm (Earias spp.) resistance

Abstract

A genetic linkage map of chromosome 6 was constructed by using 270 recombinant inbred lines originated from an upland cotton cross (Yumian 1 · T586) F 2 population. The genetic map included one morphological (T 1 ) and 18 SSR loci, covering 96.2 cM with an average distance of 5.34 cM between two markers. Based on composite interval mapping (CIM), QTL(s) affecting lint percentage, fiber length, fiber length uniformity, fiber strength and spiny bollworm resistance (Earias spp.) were identified in the t 1 locus region on chromosome 6. The allele(s) originating from T586 of QTLs controlling lint percentage increased the trait phenotypic value while the alleles originating from Yumian 1 of QTLs affecting fiber length, fiber length uniformity, fiber strength and spiny bollworm resistance increased the trait phenotypic value.Keywords Fiber quality Á Lint percentage Á QTLs (quantitative trait loci) Á Spiny bollworm (Earias spp.) resistance Á Upland cotton (Gossypium hirsutum L.)

The Hairless Stem Phenotype of Cotton (Gossypium barbadense) Is Linked to aCopia-Like Retrotransposon Insertion in aHomeodomain-Leucine ZipperGene (HD1)

“…The presence or absence of trichomes is a single-gene trait and follows Mendelian inheritance in G. arboreum and G. hirsutum (Wan et al 2007;Desai et al 2008). This trait cosegregates with the loss-of-fiber mutant sma-4 (Desai et al 2008;He et al 2013).…”

“…The T1 locus, which was mapped to chromosome 6 of the A genome, was predicted to contain major genes that regulate trichome initiation (Lacape and Nguyen 2005). This locus also has been reported frequently to cosegregate with multiple QTLs related to fiber fineness, length, elongation, color, and length uniformity (Wan et al 2007), indicating that the underlying gene(s) in this locus is (are) involved in multiple epidermal trichome development processes.…”

Construction of a linkage map and QTL mapping for fiber quality traits in upland cotton (Gossypium hirsutum L.)

“…Thus, major QTLs were both possible and efficient to improve fiber quality of cotton by MAS. In the t1 locus region on chromosome 6, Wan et al [51] detected QTLs affecting fiber length, fiber strength, fiber length uniformity, and spiny bollworm resistance that increased the trait phenotypic values. Because all the QTLs were mapped within about 5 cM of the t1 locus, this locus could be considered as the candidate gene for the QTLs, which should be particularly useful in MAS manipulation of fiber yield and quality.…”

“…That is, the two QTLs were expressed stably in different generations and environments, which should be useful for MAS for fiber quality traits in upland cotton. Dong et al [51] screened three SSR markers linked with QTLs for fiber length and studied the effect of MAS and pyramiding breeding in the three combinations. These results suggest that the construction of a saturated linkage map for G. hirsutum, the DNA markers associated with the QTL is an effective means to improve fiber quality by MAS and by pyramiding QTL in upland cotton breeding programs.…”

Cotton Genomics

“…Genetic analysis of characteristics related to fiber yield and quality has, naturally, been a high priority (Jiang et al 1998;Kohel et al 2001;Ren et al 2002;Guo et al 2003;Paterson et al 2003;Zhang et al 2003;Mei et al 2004;Chee et al 2005c,d;Draye et al 2005b;He et al 2005He et al , 2007He et al , 2008Shen et al 2005Shen et al , 2006bShen et al , 2007Ulloa et al 2005;Wang et al 2006aWang et al , 2007aAbdurakhmonov et al 2007Abdurakhmonov et al , 2008Wan et al 2007;Wu et al 2007;Asif et al 2008;Guo et al 2008;Mir et al 2008;Qin et al 2008;Saha et al 2008;Zhao et al 2008). The heavy water use of cotton has drawn attention to molecular dissection of drought tolerance (Saranga et al 2001b(Saranga et al , 2004Zhao et al 2008).…”