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W638: Understanding and modifying the nutritional and oil quality architecture to breed Nutrition-Rich and high oil quality peanuts

Pandey, M.K., Sudini, H.K., Pandey, A.K., Shasidhar, Y., Fountain, J., Manohar, S.S., Nayak, S.N., Soni, P., Kumar, R., Variath, M.T., Pandey, S., Janila, P., Bera, S.K., Liao, B., Guo, B. and Varshney, R.K.ORCID: 0000-0002-4562-9131 (2019) W638: Understanding and modifying the nutritional and oil quality architecture to breed Nutrition-Rich and high oil quality peanuts. In: Plant and Animal Genome XXVII Conference, 12 - 16 January 2019, San Diego, CA


Peanut or groundnut (Arachis hypogaea), grown and consumed in several Asian and African countries in addition to Americas, plays an important role in providing daily nutritional requirement for large population of the world. Aflatoxin contamination and allergens are the major quality and food safety concerns across globe which adversely impact the global peanut trade and commerce. On the other hand, high oleic acid is an industry preferred trait for imparting increased shelf life to peanut-based products. Through precise phenotyping, genomics, transcriptomics and molecular breeding approaches, we are developing better understanding of these traits, conducting trait mapping and candidate gene discovery, and deploying molecular breeding for developing improved peanut varieties. For example, transcriptome analysis have identified several important candidate genes and pathways for three different types of resistance mechanisms of aflatoxin contamination namely in vitro seed colonization (IVSC), pre-harvest aflatoxin contamination (PAC), and aflatoxin production (AP). Further, genetic analysis of multi-parent advanced generation intercross (MAGIC) and genome-wide association study (GWAS) on a diverse association mapping panel are likely to provide associated genomic regions and candidate genes for aflatoxin contamination. Development and deployment of precise ELISA-based methods for quantifying five major and important peanut allergens (Ara h 1, Ara h 2, Ara h 3, Ara h 6 and Ara h 8) have led to the identification of several hypoallergenic lines. Subsequently sequence/GWAS analysis is likely to identify the alleles responsible for making peanut, hypo or hyper allergenic. Allele-specific genetic markers were successfully deployed for developing several high oleic molecular breeding lines in multiple genetic backgrounds. Many of these lines are in final year of testing in India and are most likely to get released in 2019 for cultivation. Identification and development of improved peanut lines with combination of these nutritionally important and oil quality traits are likely to enhance the consumption and international trade of peanut.

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