Location: Sugarcane ResearchTitle: A genomic wide association study of yield-related traits in sugarcane
|PHIRI, THERESA - University Of Arkansas|
|BHATTARAI, GEHENDRA - University Of Arkansas|
|SHI, AINONG - University Of Arkansas|
Submitted to: Proceedings American Society of Horticultural Sciences
Publication Type: Abstract Only
Publication Acceptance Date: 5/6/2022
Publication Date: 7/31/2022
Citation: Phiri, T.M., Bhattarai, G., Shi, A., Pan, Y.-B. 2022. A genomic wide association study of yield-related traits in sugarcane [abstract]. 2022 ASHS annual conference July 30–August 3, Chicago, IL. Proceedings American Society of Horticultural Sciences. Article 37572. https://ashs.confex.com/ashs/2022/meetingapp.cgi/Paper/37572.
Technical Abstract: Sugarcane (Saccharum spp. hybrids) are complex polyaneuploid interspecific hybrids with 110–130 chromosomes. A traditional sugarcane breeding cycle takes 12 years and involves multiple-year and multiple-location testing of yield-related traits. A genome-wide association study (GWAS) was conducted to identify molecular markers associated with yield-related traits in sugarcane. Data on plant height, stalk number, stalk diameter, and stalk weight were collected from plant cane and first ratoon crops of two randomly replicated field plots of a self-progeny mapping population of the LCP85-384 cultivar. A large variation was observed for each trait among 263 self-progenies. The mapping population was genotyped with amplified fragment length polymorphisms (AFLPs), simple sequence repeats (SSRs), and target region amplification polymorphism (TRAP) markers. Mixed linear model (MLM), generalized linear model (GLM), and single marker regression (SMR) from TASSEL 5 and FarmCPU were used to conduct GWAS. The number of trait-associated molecular markers detected included 11 for stalk number, 9 for stalk weight, 21 for stalk diameter, and five for plant height. Once verified, these yield trait-associated molecular markers will be a value tool to aid in selection of yield-related traits in sugarcane variety improvement programs.