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Genomics
Volume 113 (6), 2021, Pages 3718-3734

Advances in genomics and genome editing for breeding next generation of fruit and nut crops

Siddanna Savadi, Shamsudheen Mangalassery, M.S.Sandesh

ICAR- Directorate of Cashew Research (DCR), Puttur 574 202, Dakshina Kannada, Karnataka, India.

Abstract

Fruit tree crops are an essential part of the food production systems and are key to achieve food and nutrition security. Genetic improvement of fruit trees by conventional breeding has been slow due to the long juvenile phase. Advancements in genomics and molecular biology have paved the way for devising novel genetic improvement tools like genome editing, which can accelerate the breeding of these perennial crops to a great extent. In this article, advancements in genomics of fruit trees covering genome sequencing, transcriptome sequencing, genome editing technologies (GET), CRISPR-Cas system based genome editing, potential applications of CRISPR-Cas9 in fruit tree crops improvement, the factors influencing the CRISPR-Cas editing efficiency and the challenges for CRISPR-Cas9 applications in fruit tree crops improvement are reviewed. Besides, base editing, a recently emerging more precise editing system, and the future perspectives of genome editing in the improvement of fruit and nut crops are covered.

Keywords: Genetic gains, Genome editing, Perennial, Generation advancement, Genomic selection, NGS.

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