Isozyme allele frequency changes during corn germplasm regeneration

dc.contributor.advisor A. D. Knapp
dc.contributor.advisor K. R. Lamkey Reedy, Margaret
dc.contributor.department Agronomy 2018-08-15T06:27:24.000 2020-07-02T06:16:41Z 2020-07-02T06:16:41Z Wed Jan 01 00:00:00 UTC 1992 1992
dc.description.abstract <p>Germplasm collections serve the essential function of preserving genetic diversity for current and future use. Genetic drift, the erratic, random fluctuation in gene frequency which is a function of sampling error during periodic regeneration of accessions, and selection have the potential to change the genetic identity of germplasm accessions. There is some concern that the small numbers of parents used in early regeneration cycles may have reduced variability so that the accessions may not contain all of the variability present in the original population. The degree of diversity in five maize germplasm accessions as a function of isozyme polymorphism was determined and allelic frequencies examined following several cycles of regeneration. A statistical procedure was used to test whether the observed allelic frequency variation from cycle to cycle of regeneration was consistent with that predicted by the hypothesis of drift acting alone or if a linear trend indicated possible selection. The results indicated that most of the fluctuation observed in allelic frequencies can be attributed to random genetic drift.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 10947
dc.identifier.contextkey 6371715
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/9948
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 02:39:47 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Genetics
dc.subject.keywords Agronomy
dc.subject.keywords Crop production and physiology
dc.title Isozyme allele frequency changes during corn germplasm regeneration
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a dissertation Doctor of Philosophy
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