Crop Breeding Chips and Genotyping Platforms: Progress, Challenges, and Perspectives

Rasheed, A and Hao, Y and Xia, X and Khan, A and Xu, Y and Varshney, R K and He, Z (2017) Crop Breeding Chips and Genotyping Platforms: Progress, Challenges, and Perspectives. Molecular Plant, 10 (8). pp. 1047-1064. ISSN 16742052

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There is a rapidly rising trend in the development and application of molecular marker assays for gene mapping and discovery in field crops and trees. Thus far, more than 50 SNP arrays and 15 different types of genotyping-by-sequencing (GBS) platforms have been developed in over 25 crop species and perennial trees. However, much less effort has been made on developing ultra-high-throughput and cost-effective genotyping platforms for applied breeding programs. In this review, we discuss the scientific bottlenecks in existing SNP arrays and GBS technologies and the strategies to develop targeted platforms for crop molecular breeding. We propose that future practical breeding platforms should adopt automated genotyping technologies, either array or sequencing based, target functional polymorphisms underpinning economic traits, and provide desirable prediction accuracy for quantitative traits, with universal applications under wide genetic backgrounds in crops. The development of such platforms faces serious challenges at both the technological level due to cost ineffectiveness, and the knowledge level due to large genotype–phenotype gaps in crop plants. It is expected that such genotyping platforms will be achieved in the next ten years in major crops in consideration of (a) rapid development in gene discovery of important traits, (b) deepened understanding of quantitative traits through new analytical models and population designs, (c) integration of multi-layer -omics data leading to identification of genes and pathways responsible for important breeding traits, and (d) improvement in cost effectiveness of large-scale genotyping. Crop breeding chips and genotyping platforms will provide unprecedented opportunities to accelerate the development of cultivars with desired yield potential, quality, and enhanced adaptation to mitigate the effects of climate change.

Item Type: Article
Divisions: Research Program : Genetic Gains
Uncontrolled Keywords: Molecular Breeding, Crop Cultivars, Genotyping Platforms, Genotyping, GBS and SNP chips
Subjects: Others > Plant Breeding
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 08 Aug 2017 11:02
Last Modified: 08 Aug 2017 11:02
Official URL:
Funders: National Key Research and Development Program of China and National Natural Science Foundation of China
Acknowledgement: We acknowledge critical review of the manuscript by Prof. Robert A. McIntosh, University of Sydney. No conflict of interest declared.This study was supported by the National Key Research and Development Program of China ( 2016YFD0101802 and 2016YFE0108600 ) and National Natural Science Foundation of China ( 31550110212 ).
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