Precision Breeding in Fruit Crops

Traditionally, fruit crop improvement relied on conventional breeding methods, a process that demands significant time and effort. Incremental enhancements in traits like fruit size, yield, nutrition, and taste are achieved through selective breeding of plants with desirable characteristics. However, this approach often required multiple generations to develop improved varieties. The emergence of precision breeding revolutionized fruit crop breeding by facilitating the rapid development of new varieties through the direct introgression of genes into elite lines. Precision breeding involves selection of specific phenotypic traits of interest by identifying functional markers derived from genomic regions controlling those traits. Over the last two decades, various precision breeding techniques have been developed, including marker assisted breeding, FasTrack breeding, genome editing, genetic transformation, transcriptomics, genomic selection, GWAS and RNA interference. These techniques enable the identification of genetically superior plants at early stages of development, significantly reducing time and effort. Despite these advancements, challenges such as low transformation efficiency and the lack of robust regeneration protocols in various fruit crops pose obstacles to the widespread adoption of genome editing technologies. Nonetheless, modern breeding approaches have been successfully introduced desirable traits like early maturity, increased yield and disease resistance in fruits such as mandarin, peach, strawberry, apple, and banana. Efforts to shorten breeding cycles in fruit crops have also been attempted through integrated approaches like early flowering transgenic plants combined with MAS. Maximizing the application of these innovative breeding techniques is crucial for enhancing fruit quality and accelerating fruit breeding programs. Breeders can expedite the power of precision breeding in development of improved fruit varieties, meeting the evolving demands of consumers and addressing challenges posed by changing environmental conditions and emerging diseases.