Genome-wide association study identifies three key loci for high mesocarp oil content in perennial crop oil palm

نویسندگان

  • Chee-Keng Teh
  • Ai-Ling Ong
  • Qi-Bin Kwong
  • Sukganah Apparow
  • Fook-Tim Chew
  • Sean Mayes
  • Mohaimi Mohamed
  • David Appleton
  • Harikrishna Kulaveerasingam
چکیده

GWAS in out-crossing perennial crops is typically limited by insufficient marker density to account for population diversity and effects of population structure resulting in high false positive rates. The perennial crop oil palm is the most productive oil crop. We performed GWAS for oil-to-dry-mesocarp content (O/DM) on 2,045 genotyped tenera palms using 200K SNPs that were selected based on the short-range linkage disequilibrium distance, which is inherent with long breeding cycles and heterogeneous breeding populations. Eighty loci were significantly associated with O/DM (p ≤ 10(-4)) and three key signals were found. We then evaluated the progeny of a Deli x AVROS breeding trial and a 4% higher O/DM was observed amongst those having the beneficial genotypes at two of the three key loci (p < 0.05). We have initiated MAS and large-scale planting of elite dura and pisifera parents to generate the new commercial tenera palms with higher O/DM potential.

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عنوان ژورنال:

دوره 6  شماره 

صفحات  -

تاریخ انتشار 2016