This study presents the development and mapping of simple sequence repeat (SSR) and single nucleotide polymorphism (SNP) markers in chickpea. The mapping population is based on an inter-specific cross between domesticated and non-domesticated genotypes of chickpea (Cicer arietinum ICC 4958 × C. reticulatum PI 489777). This same population has been the focus of previous studies, permitting integration of new and legacy genetic markers into a single genetic map. We report a set of 311 novel SSR markers (designated ICCM-ICRISAT chickpea microsatellite), obtained from an SSR-enriched genomic library of ICC 4958. Screening of these SSR markers on a diverse panel of 48 chickpea accessions provided 147 polymorphic markers with 2-21 alleles and polymorphic information content value 0.04-0.92. Fifty-two of these markers were polymorphic between parental genotypes of the inter-specific population. We also analyzed 233 previously published (H-series) SSR markers that provided another set of 52 polymorphic markers. An additional 71 gene-based SNP markers were developed from transcript sequences that are highly conserved between chickpea and its near relative Medicago truncatula. By using these three approaches, 175 new marker loci along with 407 previously reported marker loci were integrated to yield an improved genetic map of chickpea. The integrated map contains 521 loci organized into eight linkage groups that span 2,602 cM, with an average inter-marker distance of 4.99 cM. Gene-based markers provide anchor points for comparing the genomes of Medicago and chickpea, and reveal extended synteny between these two species. The combined set of genetic markers and their integration into an improved genetic map should facilitate chickpea genetics and breeding, as well as translational studies between chickpea and Medicago.
|Number of pages||27|
|Journal||Theoretical And Applied Genetics|
|State||Published - May 2010|
Bibliographical noteFunding Information:
Thanks are due to Prathima Juvvadi, Gudipati Srivani and Abdul Gafoor for their technical assistance. Financial support from Tropical Legume I of Generation Challenge Program (GCP, http://www.generationcp.org ) of CGIAR and National Fund of Indian Council of Agricultural Research of Government of India are gratefully acknowledged. The financial support by National Science Foundation Grant 0110206 to DRC is acknowledged. Council of Scientific and Industrial Research (CSIR), Government of India is acknowledged for providing fellowship to SNN and the Indian Council of Research NATP-HRD program for providing fellowship to SD. We thank Dr. Fred Muehlbauer of the USDA-ARS for providing the chickpea recombinant inbred population and genetic marker data.
ASJC Scopus subject areas
- Agronomy and Crop Science