Many agriculturally important traits are complex, affected by many genes and the environment. Quantitative trait loci (QTL) mapping is a key tool for studying the genetic structure of complex traits in plants. In the present study QTLs associated with yield and agronomical traits such as leaf number, leaf length, leaf width, plant height, stem and head diameter were identified by using 70 recom...

Mastitis is a costly disease of dairy cattle as it causes a loss in milk yield and milk quality in affected cows. Toll-like receptor (TLR) genes play a role in the host response to a variety of organisms including those inducing mastitis. In the present study, we investigated the polymorphism of TLR2, 4, 6 and 9 genes in Holstein cattle and ...

characteristics (Lambert and Tyler, 1999). The lack of development of superior SIR cultivars may be due to There has been limited success over the past 30 yr in the developthe quantitative nature of resistance and to the retention ment of superior soybean cultivars [Glycine max (L.) Merr] with of undesirable PI donor alleles affecting any number insect resistance. Success may be hampered by the...

Background: Couples seeking assisted reproductive donation procedures are faced with complex challenges throughout their treatment which can have important psychological impacts on their life. Selecting a suitable donor is one of the hardest decisions they will ever make. This study was carried out to provide an in-depth description of the experiences of couples in relation to donor selection. ...

a study was conducted to identify ssr markers linked to leaf rust resistance genes lr24 and lr28 and to be used for marker-assisted selection (mas) to transfer both genes to a widely cultivated wheat variety mp 3299 under rainfed condition. f2 individuals of the cross mp 3299×nil pbw 343 were used for generating genotypic data employing closely linked scar markers s73719 and s421570 to lr24 and...

The biology and genetics of silkworm, Bombyx mori, is the most advanced of any lepidopteran species. Its rich repertoire of genetic resources and potential applications in sericulture and as a model for other Lepidoptera led to the initiation of genomics research. During the past decade much effort has been made in the areas of marker development, and molecular maps have been constructed in sta...

Accordingly to the Arkansas Nematode Diagnostic Clinic 00 (Cooperative Extension Service, 00 ) the reniform nematode (Rotylenchulus reniformis Lindford and oliveira) (RN) is present in twelve counties in the state where most of the cotton (G. hirsutum) is cultivated. In fields infested with RN, yield losses are estimated at 340 to kg/ha (Robinson, 001). The RN is expected to become an even grea...

Background Connecting phenotype with genotype is the basis for developing forest genetic applications such as marker assisted selection (MAS). Quantitative Trait Locus (QTL) mapping and genetic association mapping (or linkage disequilibrium (LD) are two major approaches to find genes that control phenotypes of interest in forest trees. Quantitative trait loci (QTL) and association mapping exper...

Growth hormone (GH) has been considered as a candidate gene for growth traits in fish. In this study, polymorphisms of the GH gene were evaluated for associations with growth traits in 282 Siniperca chuatsi individuals. Using directly sequencing, four single nucleotide polymorphisms (SNPs) were identified in GH gene, with two mutations in intron 4 (g.4940A>C, g.4948A>T), one mutation in exon 5 ...

Mapping of quantitative trait loci (QTL) is essential for the discovery of genetic structures that related to complex quantitative traits. In this study, we identified 264,072 raw SNPs (single-nucleotide polymorphisms) by double digest restriction site associated DNA sequencing (ddRADseq), and utilized 3029 of these SNPs to construct a genetic linkage map in orange-spotted grouper (Epinephelus ...