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High-Oil Maize Genomics

  • Xiaohong Yang
  • Jiansheng LiEmail author
Chapter
Part of the Compendium of Plant Genomes book series (CPG)

Abstract

High-oil maize is a crop developed by artificial selection. Maize oil is high in energy and levels of polyunsaturated fatty acids, which makes high-oil maize a popular resource for food, feed, and bioenergy. Multiple high-oil germplasm resources have been developed, mainly including the Illinois High-Oil (IHO), Alexho synthetic, and Beijing High-Oil (BHO) populations. Yet, the molecular mechanisms underlying oil biosynthesis and accumulation are not well understood. Historically, quantitative genetic approaches like QTL mapping, and recently developed association mapping, have been utilized to understand the genetic architecture of oil biosynthesis and accumulation in maize kernels. Subsequently, the genes related to oil biosynthesis and accumulation were cloned by homolog-based cloning, position cloning, and association mapping. These cloned genes are involved in the oil metabolic pathway, transcription factors, and regulators controlling oil storage organ. Favorable alleles of most cloned genes for kernel oil-related traits were mined and are promising targets for improving oil quantity and quality in maize. The successful and effective transformation of the favorable allele of DGAT1-2 into elite maize hybrids confirms the effectiveness of these favorable alleles in the manipulation of oil quantity and quality.

Notes

Acknowledgements

We greatly appreciate Dr. Gen Xu in our laboratory for preparing two figures and reference list in this chapter. The funding is supported by the National Natural Foundation of China (31722039, 31361140362).

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Authors and Affiliations

  1. 1.State Key Laboratory of Plant Physiology and Biochemistry, National Maize Improvement Center of ChinaChina Agricultural UniversityBeijingChina

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