Record Details

Title:
RFLP markers linked to the root knot nematode resistance gene Mi in tomato
Publication date:
1991
Summary:
The Mi gene originating from Lycopersicon peruvianum confers resistance to Meloidogyne species. This single dominant gene is located on chromosome 6 and is closely linked to the acid phosphatase-1 (Aps1) locus. Resistance to nematodes has been introgressed into various tomato cultivars, in many cases together with Aps11. By using a pair of nearly isogenic lines differing in a small chromosomal region containing the Mi and Aps1 loci, 2 RFLP markers, GP79 and H6A2c2, were identified which are located in the introgressed L. peruvianum region. Analysis of 51 L. esculentum genotypes of various origins indicated that GP79 is tightly linked to Mi and allows both homozygous and heterozygous nematode-resistant genotypes to be distinguished from susceptible genotypes, irrespective of their Aps1 alleles. H6A2c2 is linked to Aps1 and is capable of discriminating between the L. peruvianum Aps11allele and the L. esculentum Aps13and Aps1+alleles.
Call number:
REP.TM-1440
Journal citation:
Linked resources:
Fulltext: d015563 - PDF
Contact information:
harvest@worldveg.org

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 Record created 2008-03-20, last modified 2019-03-12

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