Molecular Markers, Genetic Maps, and QTLs for Molecular Breeding in Peanut

Pandey, M K and Guo, B and Holbrook, C C and Janila, P and Zhang, X and Bertioli, D J and Isobe, S and Liang, S and Varshney, R K (2014) Molecular Markers, Genetic Maps, and QTLs for Molecular Breeding in Peanut. In: Genetics, Genomics and Breeding of Peanuts. Genetics, Genomics and Breeding of Crop Plants . CRC Press, pp. 79-113. ISBN 978-1-4822-3835-8 ; 978-1-4822-3837-2

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Abstract

Integration of plant breeding, genetics and genomics promises-to foster genetic enhancement leading to increased productivity, oil quality and resistance/tolerance to biotic and abiotic stresses. Recent advances in peanut have resulted in the development of genomic resources such as SSR markers, and genetic maps for diploids and tetraploids. Even though the tetraploid species have both the genomes, the genetic diversity observed in cultivated peanut maps has been low. Therefore, only partial (<100 loci) to low-moderate (<300 loci) genetic maps could be constructed. Consensus genetic maps were, therefore, constructed with thousands of marker loci using mapping information of multiple mapping populations in order to integrate as many markers as possible on a single genetic map. Development of SNP markers should lead to even more dense genetic maps and use of these markers in routine breeding and genetic applications. Efforts with the available limited genomic resources led to the identification of linked markers for drought tolerance, oil quality and disease resistance in peanut through trait mapping. These developments also led to deployment of linked markers to improve disease resistance and oil quality. Ongoing efforts should lead to the availability of the whole-genome sequence in the near future, providing huge genomic resources, which will hasten the much needed linking of phenotype with markers/genome sequences. However, this can only be achieved with precise and high-throughput phenotyping for complex traits. Recent advances in peanut genomics and molecular breeding efforts provide hope for efficient genetic enhancement of peanut for production as well as quality constraints.

Item Type:	Book Section
Divisions:	RP-Grain Legumes
CRP:	CGIAR Research Program on Grain Legumes
Series Name:	Genetics, Genomics and Breeding of Crop Plants
Uncontrolled Keywords:	Groundnut, Genetic maps, QTL mapping, Molecular markers, Molecular breeding, Genomic resources, Genetic improvement
Subjects:	Mandate crops > Groundnut Others > Genetics and Genomics
Depositing User:	Mr Siva Shankar
Date Deposited:	20 Jun 2014 11:07
Last Modified:	20 Oct 2014 10:33
URI:	http://oar.icrisat.org/id/eprint/8145
Acknowledgement:	UNSPECIFIED
Links:	Google Scholar

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