Discovery and utilization of QTLs for insect resistance in soybean

H. Roger Boerma, David R. Walker

Research output: Contribution to journalArticlepeer-review


Insect resistance in soybean has been an objective in numerous breeding programs, but efforts to develop high yielding cultivars with insect resistance have been unsuccessful. Three Japanese plant introductions, PIs 171451, 227687 and 229358, have been the primary sources of insect resistance alleles, but a combination of quantitative inheritance of resistance and poor agronomic performance has hindered progress. Linkage drag caused by co-introgression of undesirable agronomic trait alleles linked to the resistance quantitative trait loci (QTLs) is a persistent problem. Molecular marker studies have helped to elucidate the numbers, effects and interactions of insect resistance QTLs in the Japanese PIs, and markers are now being used in breeding programs to facilitate transfer of resistance alleles while minimizing linkage drag. Molecular markers also make it possible to evaluate QTLs independently and together in different genetic backgrounds, and in combination with transgenes from Bacillus thuringiensis.

Original languageEnglish (US)
Pages (from-to)181-189
Number of pages9
Issue number1-2
StatePublished - Feb 2005
Externally publishedYes


  • Bt
  • Insect resistance
  • Linkage drag
  • Molecular markers
  • QTL
  • Soybean

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Genetics
  • Plant Science
  • Insect Science


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