Sweet Sorghum Genetic Diversity and Association Mapping for Brix and Height

By S. Murray, William L. Rooney, M. Hamblin, S. Mitchell, Stephen Kresovich. 2009

236 citations recorded by the source corpus.

Sweet sorghum [Sorghum bicolor (L.) Moench], like its close relative, sugarcane (Saccharum spp.), has been selected to accumulate high levels of edible sugars in the stem. Sweet sorghums are tall and produce high biomass in addition to sugar. Little has been documented about the genetic relationships and diversity within sweet sorghums and how sweet sorghums relate to grain sorghum racial types. In this study, a diverse panel of 125 sorghums (mostly sweet) was successfully genotyped with 47 simple sequence repeats (SSRs) and 322 single nucleotide polymorphisms (SNPs). Using both distance‐based and model‐based methods, we identified three main genetic groupings of sweet sorghums. Based on observed phenotypes and known origins we classified the three groups as historical and modern syrup, modern sugar/energy types, and amber types. Using SSR markers also scored in an available large grain sorghum germplasm panel, we found that these three sweet groupings clustered with kafir/bicolor, caudatum, and bicolor types, respectively. Using the information on population structure and relatedness, association mapping was performed for height and stem sugar (brix) traits. Three significant associations for height were detected. Two of these, on chromosomes 9 and 6, support published QTL studies. One significant association for brix, on chromosome 1, 12kb from a glucose‐6‐phosphate isomerase homolog, was detected.

Subfields: Agronomy and Crop Science, Genetics

View Paper: https://www.semanticscholar.org/paper/11a38f202f9f4e12fa2ff2fa3aea99e431729540

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Agronomy and Crop Science

In Genetics

Citations in the corpus

Comprehending crystalline β-carotene accumulation by comparing engineered cell models and the natural carotenoid-rich system of citrus (2011, unknown): “It”
Association Mapping for Grain Quality in a Diverse Sorghum Collection (2012, methodology): “…kb except in the centromere regions. h e 384 SNP assay was developed from SNPs discovered in previously published studies (Hamblin et al., 2004, 2005, 2006, 2007), starch pathways (Hamblin et al., 2007), sucrose pathways (Murray et al., 2009), and carotenoid pathways (Salas Fernandez et al., 2009).”