Abstract
Eggplant is an important Solanaceous vegetable crop with distinct morphological forms, colours, and shape of the fruits. Limited genomic coverage of the crop is a major constraint to unfold the cause of morphological variations underlying the contrasting traits. Therefore, with the aim to initiate targeted breeding efforts and to render ready-to-use markers for application in map** quantitative trait loci (QTLs)/genes and to facilitate MAS, arbitrary and microsatellite molecular markers were used to map an inter-specific map** population of 114 F8-recombinant inbred lines (RILs) developed using two contrasting lines, Ramnagar Giant (Solanum melongena L.) and W-4 (S. incanum L.). The arbitrary and microsatellite markers were screened for polymorphism with aim to cover the whole genome of eggplant. Of the total 1443 number of markers investigated, 6.07% RAPDs, 25% ISSR, 46.25% SCoT, and 22.46% SSRs revealed polymorphism between the parental lines, and were used for genoty** the RILs population. The results exhibit robust and sturdy nature of SCoT and microsatellite markers in unwrap** variations between both genotypes. Further, a high-density genetic linkage map was constructed with LOD threshold ≥ 4 clustered into 12 tentative linkage groups and spanning 1165 cM of the eggplant genome with an average marker density of 4.13 cM. The results shall further be used in map** QTLs of agri-horticultural traits in eggplant.
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Abbreviations
- AFLP:
-
Amplified fragment length polymorphism
- APS:
-
Ammonium persulphate
- BC:
-
Back cross
- CGA:
-
Chlorogenic acid
- cM:
-
Centimorgan
- CTAB:
-
Cetyl trimethyl ammonium bromide
- GBS:
-
Genoty** by sequencing
- ISSR:
-
Inter simple sequence repeats
- LG:
-
Linkage groups
- LOD:
-
Logarithm of odds
- MAS:
-
Marker assisted selection
- NCBI:
-
National Centre for Biotechnology Information
- NGS:
-
Next generation sequencing
- PAGE:
-
Polyacrylamide gel electrophoresis
- PCR:
-
Polymerase chain reaction
- QTL:
-
Quantitative trait loci
- RAD:
-
Restriction-site associated DNA
- RAPD:
-
Random amplified polymorphic DNA
- RFLP:
-
Restriction fragment length polymorphism
- RIL:
-
Recombinant inbred line
- SCoT:
-
Start codon targeted
- SNV:
-
Single nucleotide variants
- SSR:
-
Simple sequence repeat
- STMS:
-
Sequence tagged microsatellite site
- SBG:
-
Sequence-based genoty**
- TEMED:
-
Tetramethylethylenediamine
- TSA:
-
Transcriptome shotgun assembly
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Authors thankfully acknowledge the support of the Director, ICAR-Indian Institute of Vegetable Research, Varanasi for providing field and laboratory facilities necessary to carry out the present study.
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Supplementary Table S1
Nucleotide sequence and obtained allele size in polymorphic arbitrary markers. (XLSX 15 kb)
Supplementary Table S2
Nucleotide sequence and obtained allele size in polymorphic microsatellite markers. (XLSX 38 kb)
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Mishra, P., Tiwari, S.K., Kashyap, S.P. et al. High-density genetic linkage map based on arbitrary and microsatellite markers using inter-specific recombinant inbred lines in eggplant (Solanum melongena L.). J. Plant Biochem. Biotechnol. 29, 427–438 (2020). https://doi.org/10.1007/s13562-020-00549-w
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DOI: https://doi.org/10.1007/s13562-020-00549-w