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ARS Home » Midwest Area » Ames, Iowa » Corn Insects and Crop Genetics Research » Research » Publications at this Location » Publication #108723
Title: GENETIC DIVERSITY IN MAIZE INBREDS COMPARED TO ANCESTRAL POPULATIONS USING SSRS

Author
item LABATE, JOANNE - FORMER USDA EMPLOYEE
item Lamkey, Kendall

Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: 1/5/2000
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: We wish to determine whether modern U.S. maize is as genetically diverse as it was before hybrid cultivars became popular during the early part of this century. We are genotyping Corn Belt Dent related germplasm (open- pollinated populations, synthetic populations, inbred lines, and hybrid cultivars) at 48 SSR loci randomly distributed throughout the genome. Preliminary results show that open-pollinated populations carried an average of 5.8 alleles per locus while inbred lines carried 3.4. The mean expected heterozygosity (PIC value) was similar in inbreds and open- pollinated populations, approximately 0.58. Analysis of population differentiation showed that most of the genetic variation was within rather than among the open-pollinated accessions.