Repeatability and heritability of divergent recombination frequencies in the Iowa Stiff Stalk Synthetic (Zea mays L.)

R. G. Hadad, T. W. Pfeiffer, C. G. Poneleit

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Variability in recombination frequency was reported in the Iowa Stiff Stalk Synthetic. The objectives of the present research were to verify the differences in recombination frequency among individuals in the Iowa Stiff Stalk Synthetic maize population and to determine if the recombination frequency differences persisted among the S1 progeny. Testcrosses to measure male recombination frequency on three chromosomes (4, su1-c2; 5, a2-bt1-pr1; 9, sh1-bz1-wx1) were repeated for eight S0 individuals. Recombination frequencies were repeatably divergent among those individuals which were selected based on high or low recombination frequencies on specific chromosomes. Individuals which had been selected for long and short total map distances across the three chromosome regions produced repeatably divergent recombination frequencies only at the su1-c2 region. The recombination frequencies of the S1 lines, derived from the S0 individuals which had the most divergent recombination frequencies on a single chromosome, were significantly different. The broad-sense heritability estimates derived from the regression of six S1 lines on six S0 individuals ranged from 0.69 to 0.20 for the five chromosome regions. We conclude that genetic differences for recombination frequency exist in this population and that modification by selection should be possible.

Original languageEnglish
Pages (from-to)990-996
Number of pages7
JournalTheoretical And Applied Genetics
Issue number5-6
StatePublished - Oct 1996


  • Corn
  • Crossing-over
  • Testcross

ASJC Scopus subject areas

  • Biotechnology
  • Agronomy and Crop Science
  • Genetics


Dive into the research topics of 'Repeatability and heritability of divergent recombination frequencies in the Iowa Stiff Stalk Synthetic (Zea mays L.)'. Together they form a unique fingerprint.

Cite this