Summary
A genetic linkage map of lentil comprising 333 centimorgans (cM) was constructed from 20 restriction fragment length, 8 isozyme, and 6 morphological markers segregating in a single interspecific cross (Lens culinaris × L. orientalis). Because the genotypes at marker loci were determined for about 66 F2 plants, linkages are only reported for estimates of recombination less than 30 cM. Probes for identification of restriction fragment length polymorphisms (RFLPs) were isolated from a cDNA and EcoRI and PstI partial genomic libraries of lentil. The cDNA library gave the highest frequency of relatively low-copy-number probes. The cDNAs were about twice as efficient, relative to random genomic fragments, in RFLP detection per probe. Nine markers showed significant deviations from the expected F2 ratios and tended to show a predominance of alleles from the cultigen. Assuming a genome size of 10 Morgans, 50% of the lentil genome could be linked within 10 cM of the 34 markers and the map is of sufficient size to attempt mapping of quantitative trait loci.
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Communicated by J. Beckmann
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Havey, M.J., Muehlbauer, F.J. Linkages between restriction fragment length, isozyme, and morphological markers in lentil. Theoret. Appl. Genetics 77, 395–401 (1989). https://doi.org/10.1007/BF00305835
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DOI: https://doi.org/10.1007/BF00305835