Genetic analysis of complex traits in alfalfa (Medicago sativa L)

dc.contributor.advisor E. Charles Brummer
dc.contributor.author Robins, Joseph
dc.contributor.department Agronomy
dc.date 2018-08-25T02:48:44.000
dc.date.accessioned 2020-06-30T07:12:41Z
dc.date.available 2020-06-30T07:12:41Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2004
dc.date.issued 2004-01-01
dc.description.abstract <p>The genetic structure of complex agronomic traits in alfalfa ( Medicago sativa) is not well understood. By crossing the subspecies M. sativa subsp. falcata and M. sativa subsp. sativa, a fullsib F1 population was created from which a genetic linkage map of each parental genome was developed using RFLP and SSR markers. These maps include simplex, duplex, and simplex-simplex alleles along with a number of alleles exhibiting segregation distortion. The inclusion of these more complicated segregation ratios resulted in greater saturation of the genome, a better convergence to eight consensus linkage groups, and a more realistic view of regions of the genome that may not behave normally due to segregation distortion than would have been possible by only using simplex alleles as has been done previously.;The population was clonally propagated and grown at three field locations with phenotypic data collected over three years for various agronomic traits, including biomass production, forage height, and forage regrowth. Combining the marker data with the phenotypic data, markers were identified from each parental genome that were associated with these traits, suggesting that both major germplasm sources of cultivated alfalfa contain alleles that may contribute to improved alfalfa cultivars. These results provide a much better understanding of the genomic regions underlying these traits and are an important start in efforts aimed at the use of marker-assisted selection for the improvement of alfalfa cultivars.*;*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Microsoft Office.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/1141/
dc.identifier.articleid 2140
dc.identifier.contextkey 6090575
dc.identifier.doi https://doi.org/10.31274/rtd-180813-4573
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/1141
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/64664
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/1141/r_3158222.pdf|||Fri Jan 14 18:49:45 UTC 2022
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Genetics
dc.subject.keywords Agronomy
dc.subject.keywords Genetics
dc.title Genetic analysis of complex traits in alfalfa (Medicago sativa L)
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
thesis.degree.discipline Genetics
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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