Genome-Wide Association Studies of 39 Seed Yield-Related Traits in Sesame (Sesamum indicum L.)

International Journal of Molecular Sciences
Rong ZhouXiurong Zhang

Abstract

Sesame is poised to become a major oilseed crop owing to its high oil quality and adaptation to various ecological areas. However, the seed yield of sesame is very low and the underlying genetic basis is still elusive. Here, we performed genome-wide association studies of 39 seed yield-related traits categorized into five major trait groups, in three different environments, using 705 diverse lines. Extensive variation was observed for the traits with capsule size, capsule number and seed size-related traits, found to be highly correlated with seed yield indexes. In total, 646 loci were significantly associated with the 39 traits (p < 10-7) and resolved to 547 quantitative trait loci QTLs. We identified six multi-environment QTLs and 76 pleiotropic QTLs associated with two to five different traits. By analyzing the candidate genes for the assayed traits, we retrieved 48 potential genes containing significant functional loci. Several homologs of these candidate genes in Arabidopsis are described to be involved in seed or biomass formation. However, we also identified novel candidate genes, such as SiLPT3 and SiACS8, which may control capsule length and capsule number traits. Altogether, we provided the highly-anticipated basis fo...Continue Reading

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Citations

Jun 4, 2019·International Journal of Molecular Sciences·Pedro Martínez-Gómez
Aug 23, 2019·International Journal of Molecular Sciences·Libin WeiHaiyang Zhang
Feb 11, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Mebeaselassie AndargiePetr Karlovsky

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Methods Mentioned

BETA
restriction-site associated DNA sequencing
PCR
RNA-seq
transgenic

Software Mentioned

corrplot
Blast2GO
Sinbase
Primer5
R2
Genetic type 1 Error Calculator
ggplot2
WEGO

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