Alleles to enhance antioxidant content in maize - a genome-wide association approach

Journal of Agricultural and Food Chemistry
Mara Lisa AlvesMaria Carlota Vaz Patto

Abstract

The interest in antioxidant compounds breeding in maize (Zea mays L.), a major food crop, has increased in recent years. However, breeding for antioxidant compounds in maize can be hampered given the complex genetic nature of these compounds. In this work we followed a genome-wide association approach, using a unique germplasm collection (containing Portuguese germplasm), to study the genetic basis of several antioxidants in maize. Sixty-seven genomic regions associated with seven antioxidant compounds and two color-related traits were identified. Several significant associations were located within or near genes involved in the carotenoids (Zm00001d036345) and tocopherols biosynthetic pathways (Zm00001d017746). Some indications of a negative selection against α-tocopherol levels were detected in the Portuguese maize germplasm. The strongest SNP-trait associations and the SNPs alleles with larger effect sizes were pinpointed and set as priority for future validation studies; these association now detected constitute a benchmark for develop molecular selection tools for antioxidant compounds selection in maize.

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Citations

Jul 31, 2021·Plant Communications·David B MedeirosAlisdair R Fernie
Jun 24, 2020·Journal of Agricultural and Food Chemistry·Mara Lisa AlvesMaria Carlota Vaz Patto
Oct 8, 2021·The Plant Genome·Ana Margarida SampaioMaria Carlota Vaz Patto

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