A COSII genetic map of the pepper genome provides a detailed picture of synteny with tomato and new insights into recent chromosome evolution in the genus Capsicum

Wu, Feinan; Eannetta, Nancy T.; Xu, Youqiang; Durrett, Richard; Mazourek, Michael; Jahn, Molly M.; Tanksley, Steven D.

doi:10.1007/s00122-009-0980-y

Cited by 150 publications

(178 citation statements)

References 33 publications

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“…is number, AR is arm ratio,TF is total form percentage and CV is cultivated variety. Wu et al (2009) developed a pepper genetic linkage map which comprises 299 orthologous markers between the pepper and tomato genomes (including 263 conserved orthologue set II or COSII markers). This is the first complete map in which all markers could be placed in 12 linkage groups corresponding to the 12 chromosomes.…”

Section: Resultsmentioning

confidence: 99%

Karyotype analysis of seven cultivated varieties ofCapsicum annuumL.

S¹,

Pant²

2013

Caryologia

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The karyomorphology of seven different cultivated varieties of Capsicum annuum L. was studied to determine similarities and differences amongst the karyotypes and to provide diagnostic features of the different chromosomes in the haploid complement of each variety. Capsicum annuum exhibits certain morphological variations with respect to fruit size, fruit stalk length, number of fruits per plant, number of seeds per fruit, etc. Therefore seven morphologically distinct varieties were used for studies. It was observed that although the somatic chromosome number is the same (2n = 24) in all the seven varieties studied, they differed markedly in their chromosome morphology and total haploid chromatin length. The total length of the haploid complement in the varieties studied varied from 48.26 to 62.96 μm. All the varieties have comparable chromosome size, karyotype symmetry and chromosome types. The number of satellites varied from 1 to 2 and they were present at the end of the short arm. Long arm/short arm ratio was the highest in cultivated variety Pusa sadabahar, showing its advanced nature. The total haploid chromatin length was found to have a significant positive correlation with the pericarp weight, number of seeds/fruit, fruit stalk length, fruit girth and fruit surface area. Thus from the karyotype features, the varieties appear to be distinct. The seven cultivated varieties of Capsicum annuum L. have comparable chromosome size, karyotype symmetry and chromosome types. They exhibit close relationships which indicate their probable origin from a common ancestor. In finer details, some recognizable differences were noticed between the varieties. Thus the karyotype analysis of the seven varieties revealed that minute structural alteration of chromosomes associated with genomic chromatin length, etc, has played an important role in establishment of new cultivated varieties.

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Section: Resultsmentioning

confidence: 99%

Karyotype analysis of seven cultivated varieties ofCapsicum annuumL.

S¹,

Pant²

2013

Caryologia

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“…Four of the SSR markers we screened (GPMS 171, HPMS 1-117, HPMS 1-3 and HPMS 2-41) had been localized on the COSII pepper map ( Fig. 1c; Wu et al 2009). Therefore we used their positions to predict the location of the Me1 gene on the COSII map as follows.…”

Section: Testing the Me-specific Markers In Our Populationmentioning

confidence: 99%

Development of a SNP-based CAPS assay for the Me1 gene conferring resistance to root knot nematode in pepper

et al. 2015

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Root knot nematodes (Meloidogyne spp.) are significant agricultural pests on many crops, including pepper (Capsicum annuum). Host plant resistance offers the most sustainable means of controlling this pest. A cluster of genes on chromosome 9 confers resistance, with Me1 providing protection against three nematode species: M. incognita, M. javanica and M. arenaria. We describe the development of a codominant CAPS marker located 1.13 cM away from the Me1 gene. This marker should be useful for marker assisted selection of nematode resistance in pepper breeding programs.

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“…Recently, a set of polymerase chain reaction (PCR)-based ortholog markers (Wu et al 2006), have been used to compare genomes of solanaceous species (tomato, eggplant (Wu et al 2009a), pepper (Wu et al 2009b), and tobacco (Wu et al 2009c)), and a related taxa such as Rubiaceae species: coffee. These markers are referred to Conserved Orthologous Set (COSII) markers.…”

Section: Introductionmentioning

confidence: 99%

High resolution synteny maps allowing direct comparisons between the coffee and tomato genomes

Lefebvre-Pautigny

Philippot

et al. 2010

Tree Genetics & Genomes

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Tomato (Solanum lycopersicum) and coffee (Coffea canephora) belong to the sister families Solanaceae and Rubiaceae, respectively. We report herein the mapping of a common set of 257 Conserved Ortholog Set II genes in the genomes of both species. The mapped markers are well distributed across both genomes allowing the first syntenic comparison between species from these two families. The majority (75%) of the synteny blocks are short (<4 cM); however, some extend up to 50 cM. In an effort to further characterize the synteny between these two genomes, we took advantage of the available sequence for the tomato genome to show that tomato chromosome 7 is syntenic to half of the two coffee linkage groups E and F with the putative break point in tomato localized to the boundary of the heterochromatin and euchromatin on the long arm. In addition to the new insight on genome conservation and evolution between the plant families Solanaceae and Rubiaceae, the comparative maps presented herein provide a translational tool by which coffee researchers may take benefit of DNA sequence and genetic information from tomato and vice versa. It is thus expected that these comparative genome information will help to facilitate and expedite genetic and genomic research in coffee.

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A COSII genetic map of the pepper genome provides a detailed picture of synteny with tomato and new insights into recent chromosome evolution in the genus Capsicum

Cited by 150 publications

References 33 publications

Karyotype analysis of seven cultivated varieties ofCapsicum annuumL.

Karyotype analysis of seven cultivated varieties ofCapsicum annuumL.

Development of a SNP-based CAPS assay for the Me1 gene conferring resistance to root knot nematode in pepper

High resolution synteny maps allowing direct comparisons between the coffee and tomato genomes

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