1. Sorghum Dw2 Encodes a Protein Kinase Regulator of Stem Internode Length.
- Author
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Hilley JL, Weers BD, Truong SK, McCormick RF, Mattison AJ, McKinley BA, Morishige DT, and Mullet JE
- Subjects
- Chromosome Mapping, Genotype, Plant Breeding, Plant Proteins genetics, Plant Proteins metabolism, Plant Stems genetics, Plant Stems growth & development, Quantitative Trait Loci, Sequence Analysis, DNA, Sorghum genetics, Protein Kinases genetics, Protein Kinases metabolism, Sorghum growth & development
- Abstract
Sorghum is an important C4 grass crop grown for grain, forage, sugar, and bioenergy production. While tall, late flowering landraces are commonly grown in Africa, short early flowering varieties were selected in US grain sorghum breeding programs to reduce lodging and to facilitate machine harvesting. Four loci have been identified that affect stem length (Dw1-Dw4). Subsequent research showed that Dw3 encodes an ABCB1 auxin transporter and Dw1 encodes a highly conserved protein involved in the regulation of cell proliferation. In this study, Dw2 was identified by fine-mapping and further confirmed by sequencing the Dw2 alleles in Dwarf Yellow Milo and Double Dwarf Yellow Milo, the progenitor genotypes where the recessive allele of dw2 originated. The Dw2 locus was determined to correspond to Sobic.006G067700, a gene that encodes a protein kinase that is homologous to KIPK, a member of the AGCVIII subgroup of the AGC protein kinase family in Arabidopsis.
- Published
- 2017
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