Molecular Breeding

, Volume 18, Issue 1, pp 39–50

The identification and characterisation of alleles of sucrose phosphate synthase gene family III in sugarcane

  • C.L. McIntyre
  • M. Jackson
  • G.M. Cordeiro
  • O. Amouyal
  • S. Hermann
  • K.S. Aitken
  • F. Eliott
  • R.J. Henry
  • R.E. Casu
  • G.D. Bonnett
Original paper

DOI: 10.1007/s11032-006-9012-7

Cite this article as:
McIntyre, C., Jackson, M., Cordeiro, G. et al. Mol Breeding (2006) 18: 39. doi:10.1007/s11032-006-9012-7

Abstract

Little is known about the extent of allelic diversity of genes in the complex polyploid, sugarcane. Using sucrose phosphate synthase (SPS) Gene (SPS) Family III as an example, we have amplified and sequenced a 400 nt region from this gene from two sugarcane lines that are parents of a mapping population. Ten single nucleotide polymorphisms (SNPs) were identified within the 400 nt region of which seven were present in both lines. In the elite commercial cultivar Q165A, 10 sequence haplotypes were identified, with four haplotypes recovered at 9% or greater frequency. Based on SNP presence, two clusters of haplotypes were observed. In IJ76-514, a Saccharum officinarum accession, 8 haplotypes were identified with 4 haplotypes recovered at 13% or greater frequency. Again, two clusters of haplotypes were observed. The results suggest that there may be two SPS Gene Family III genes per genome in sugarcane, each with different numbers of different alleles. This suggestion is supported by sequencing results in an elite parental sorghum line, 403463-2-1, in which 4 haplotypes, corresponding to two broad types, were also identified. Primers were designed to the sugarcane SNPs and screened over bulked DNA from high and low Sucrose-containing progeny from a cross between Q165A and IJ76-514. The SNP frequency did not vary in the two bulked DNA samples, suggesting that these SNPs from this SPS gene family are not associated with variation in sucrose content. Using an ecotilling approach, two of the SPS Gene Family III haplotypes were mapped to two different linkage groups in homology group 1 in Q165A. Both haplotypes mapped near QTLs for increased sucrose content but were not themselves associated with any sugar-related trait.

Keywords

Sugarcane SNP Sucrose phosphate synthase Ecotilling Sugar Sorghum 

Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • C.L. McIntyre
    • 1
    • 4
  • M. Jackson
    • 1
    • 4
  • G.M. Cordeiro
    • 2
    • 4
  • O. Amouyal
    • 2
    • 4
  • S. Hermann
    • 3
    • 4
  • K.S. Aitken
    • 1
    • 4
  • F. Eliott
    • 2
    • 4
  • R.J. Henry
    • 2
    • 4
  • R.E. Casu
    • 1
    • 4
  • G.D. Bonnett
    • 1
    • 4
  1. 1.CSIRO Plant IndustrySt LuciaAustralia
  2. 2.Centre for Plant Conservation and GeneticsSouthern Cross UniversityLismoreAustralia
  3. 3.School of Integrative BiologyUniversity of QueenslandIndooroopillyAustralia
  4. 4.CRC for Sugar Industry Innovation through BiotechnologyUniversity of QueenslandSt LuciaAustralia