Mapping resistance to cereal aphids in barley

S. Moharramipour, H. Tsumuki, K. Sato, H. Yoshida

    Research output: Contribution to journalArticlepeer-review

    27 Citations (Scopus)

    Abstract

    A set of 150 doubled-haploid (DH) barley (Hordeum vulgare L.) lines derived from the cross of Harrington/TR306 was used to determine the number and chromosomal location of quantitative trait loci (QTLs) controlling resistance to cereal aphids. The experiments were conducted under natural infestation in the field during two growing seasons: 1994 and 1995. Aphid resistance was measured by counting the number of aphids per plot. Counts were made on a weekly basis. Each year at the time of maximum aphid density there was an obvious difference in reaction between the parental genotypes. The DH lines showed continuous variation for aphid density. Simple interval mapping and simplified composite interval mapping revealed that the principal QTL determining cereal aphid resistance is on the distal region of the short arm of chromosome 1. This aphid-resistance QTL is linked with a heading-date QTL. At the time of highest aphid infestation, this QTL accounted for 31% and 22% of the total variance of aphid density in 1994 and 1995, respectively. A QTL on chromosome 5 was also detected but only by simplified composite interval mapping. However, the largest consistent effect was due to the QTL on the short arm of chromosome 1. This QTL may be a useful target for marker-assisted selection for adult plant cereal aphid resistance in barley.

    Original languageEnglish
    Pages (from-to)592-596
    Number of pages5
    JournalTheoretical and Applied Genetics
    Volume94
    Issue number5
    DOIs
    Publication statusPublished - Apr 1 1997

    Keywords

    • Barley
    • Cereal aphids
    • Gene mapping
    • Insect resistance
    • Quantitative trait loci

    ASJC Scopus subject areas

    • Biotechnology
    • Agronomy and Crop Science
    • Genetics

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