Fatty acid desaturase-2 (ahFAD2) mutant alleles in peanut (Arachis hypogaea L.) pre-breeding lines: an insight into the source, features, discourse, and selection of novel pre-breeding lines

Kamdar, J H and Jasani, M D and Ajay, B C and Rani, K and Manivannan, N and Vasanthi, R P and Dobariya, K L and Pandey, M K and Janila, P and Radhakrishnan, T and Varshney, R K and Bera, S K (2020) Fatty acid desaturase-2 (ahFAD2) mutant alleles in peanut (Arachis hypogaea L.) pre-breeding lines: an insight into the source, features, discourse, and selection of novel pre-breeding lines. Genetic Resources and Crop Evolution (TSI). ISSN 0925-9864

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Abstract

High oleic peanuts and derived food products offer longer shelf life benefits to the food processing industry in addition to multiple health benefits to the consumers. The two mutant alleles, ahFAD2A and ahFAD2B control composition of oleic, linoleic and palmitic acid content in peanut. A total of 563 peanut pre-breeding lines were tested for the presence ahFAD2A and ahFAD2B mutant alleles using allele specific markers. The ahFAD2A mutant allele was present in 82 lines, while none of these lines had ahFAD2B mutant allele. Among botanical types, ahFAD2A mutant allele was more frequent in lines with Virginia growth habit than Spanish bunch although no correlation of ahFAD2A mutant allele with high oleic acid content and growth habit could be established. Oleic and linoleic acid content in 82 prebreeding lines ranged from 39.70 to 62.70% and 17.76 to 31.95%, respectively, with maximum oleic to linoleic acid ratio of 4. Oleic acid was found to be negatively correlated with linoleic and palmitic acid. Further, pre-breeding lines with ahFAD2A mutant allele, high oleic content and high oleic to linoleic ratio were investigated and novel lines were identified for resistance to late leaf spot, short duration, higher pod yield and other yield related traits. These novel pre-breeding lines can be used as a potential donor in peanut improvement programme and to diversify the primary gene pool including initiating further research on induction of fresh ahFAD2B mutant allele.

Item Type: Article
Divisions: Research Program : Asia
Research Program : Genetic Gains
CRP: UNSPECIFIED
Uncontrolled Keywords: Peanut, ´┐ŻOleic acid, Linoleic acid, Palmitic acid, Oil quality, Shelf life, Pre-breeding, Groundnut lines
Subjects: Others > Plant Breeding
Mandate crops > Groundnut
Others > Genetics and Genomics
Depositing User: Mr Arun S
Date Deposited: 10 Sep 2020 03:48
Last Modified: 10 Sep 2020 03:48
URI: http://oar.icrisat.org/id/eprint/11618
Official URL: https://doi.org/10.1007/s10722-020-00999-0
Projects: UNSPECIFIED
Funders: The Indian Council of Agricultural Research (ICAR), New Delhi
Acknowledgement: We acknowledge the support received from the ICAR and Director, ICAR-Directorate of Groundnut Research (ICAR-DGR), Junagadh for facilitating the research.
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