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Method-of-Moments
Estimators for two-gene coefficients of relationship and inbreeding, along with four-gene Cotterman coefficients. He alongside Michael Lynch, introduced regression estimators for joint estimation of two-gene and four-gene coefficients of relationship using codominant molecular markers in randomly mating populations. His study on plant mating systems published in
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publication presenting the draft assembly of the 20-gigabase genome of Norway spruce, identifying novel genomic features. In a study on scalable bioinformatics tools, he and fellow researchers provided genomics resources for forest management and conservation by utilizing
Illumina platforms and ABySS
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Ritland has explored the impact of climate change on forest trees, particularly the consequences of gene flow. He proposed a mixed mating model for multiple unlinked loci with Subodh Jain, outlining a procedure to estimate outcrossing rates using genotypic data from families. In 1996, he introduced
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presented four model extensions using genetic markers, providing formulas for method-of-moments estimators for individual outcrossing rates in both gymnosperms and angiosperms. In addition, he investigated the balance of positive and negative consequences of gene flow in different distribution
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populations and proposed marker loci with multiple alleles as a potential solution. In addressing the challenge of developing simple sequence repeat (SSR) markers in conifer genomes, he, along with collaborators, utilized expressed sequence tags (ESTs) from a 20,275-unigene spruce dataset,
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Ritland has made contributions to forest genetics for sustainable management and conservation. He reported the draft genome of the black cottonwood tree using shotgun sequence assembly and genetic mapping, resulting in a chromosome-scale reconstruction that unveiled over 45,000 putative
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Nystedt, B., Street, N. R., Wetterbom, A., Zuccolo, A., Lin, Y. C., Scofield, D. G., ... & Jansson, S. (2013). The Norway spruce genome sequence and conifer genome evolution. Nature, 497(7451), 579–584.
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Tuskan, G. A., Difazio, S., Jansson, S., Bohlmann, J., Grigoriev, I., Hellsten, U., ... & Rokhsar, D. (2006). The genome of black cottonwood, Populus trichocarpa (Torr. & Gray). science, 313(5793),
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491:"Global transcript profiling of primary stems from Arabidopsis thaliana identifies candidate genes for missing links in lignin biosynthesis and transcriptional regulators of fiber differentiation"
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identifying 44 EST-SSR markers. He investigated vascular and interfascicular fiber differentiation along the bolting stems axis in
Arabidopsis by utilizing global transcript profiling with an
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software for whole-genome shotgun sequencing. This approach yielded a 20.8 giga base pairs draft genome of white spruce (Picea glauca) assembled into 4.9 million scaffolds.
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Ritland, K. (1996). Estimators for pairwise relatedness and individual inbreeding coefficients. Genetics
Research, 67(2), 175–185.
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Ritland, K. (2002). Extensions of models for the estimation of mating systems using n independent loci. Heredity, 88(4), 221–228.
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Lynch, M., & Ritland, K. (1999). Estimation of pairwise relatedness with molecular markers. Genetics, 152(4), 1753–1766.
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Ritland introduced a mating system model for partially selfing populations by employing electrophoretic markers in two
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full-genome longmer microarray, revealing 182 upregulated transcription factors linked to fiber development.
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which was a collaborative effort involving 34 institutions. He secured a
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Molecular markers and genetic relationships in natural populations
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sections, suggesting integrated research in dispersal biology.
375:"Estimation of Pairwise Relatedness With Molecular Markers"
463:"Correlated matings in the partial selfer Mimulus guttatu"
417:"The Genome of Black Cottonwood, Populus trichocarpa"
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Academic staff of the
University of British Columbia
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protein-coding genes. He also contributed to a 2013
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148:Ritland obtained his Bachelor of Science from the
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531:University of California, Davis alumni
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302:"What Makes a White Bear White"
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288:"Dr. Kermit Ritland"
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52:Doctor of Philosophy
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237:Selected articles
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144:Education
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178:genetics
168:Research
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