Integrated genomics and molecular breeding approaches for dissecting the complex quantitative traits in crop plants.
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Date
2013-12
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Abstract
The enormous population growth, climate change and global warming are now considered major threats to agriculture
and world’s food security. To improve the productivity and sustainability of agriculture, the development of highyielding
and durable abiotic and biotic stress-tolerant cultivars and/climate resilient crops is essential. Henceforth,
understanding the molecular mechanism and dissection of complex quantitative yield and stress tolerance traits is the
prime objective in current agricultural biotechnology research. In recent years, tremendous progress has been made in
plant genomics and molecular breeding research pertaining to conventional and next-generation whole genome,
transcriptome and epigenome sequencing efforts, generation of huge genomic, transcriptomic and epigenomic
resources and development of modern genomics-assisted breeding approaches in diverse crop genotypes with
contrasting yield and abiotic stress tolerance traits. Unfortunately, the detailed molecular mechanism and gene
regulatory networks controlling such complex quantitative traits is not yet well understood in crop plants. Therefore,
we propose an integrated strategies involving available enormous and diverse traditional and modern –omics
(structural, functional, comparative and epigenomics) approaches/resources and genomics-assisted breeding methods
which agricultural biotechnologist can adopt/utilize to dissect and decode the molecular and gene regulatory networks
involved in the complex quantitative yield and stress tolerance traits in crop plants. This would provide clues and
much needed inputs for rapid selection of novel functionally relevant molecular tags regulating such complex traits to
expedite traditional and modern marker-assisted genetic enhancement studies in target crop species for developing
high-yielding stress-tolerant varieties.
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Keywords
Complex quantitative traits, genomics, molecular breeding, SNP, SSR
Citation
Kujur Alice, Saxena Maneesha S, Bajaj Deepak, Laxmi, Parida Swarup K. Integrated genomics and molecular breeding approaches for dissecting the complex quantitative traits in crop plants. Journal of Biosciences. 2013 Dec; 38(5): 971-987.