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Masters_Thesis_Willman,M.pdf (3.22 MB)

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Genetic Analysis of Black Raspberry Breeding Germplasm

Willman, Matthew
http://rave.ohiolink.edu/etdc/view?acc_num=osu1563451332753356

Abstract Details

2019, Master of Science, Ohio State University, Horticulture and Crop Science.
U.S. black raspberry (BR) production is currently limited by narrowly adapted, elite germplasm. Improved understanding of genetic control and stability of pomological traits will inform the development of improved BR germplasm and cultivars. To this end, analysis of a multiple-environment trial of two BR mapping populations derived from crosses of commercial cultivars with wild accessions has provided insights into genetic variation, genotype-by-environment interactions (GEI), quantitative trait loci (QTL), and QTL-by-environment interactions (QEI) of fruit quality traits among diverse field environments. Genetic components and stability of four fruit size traits and six fruit biochemistry were characterized in two mapping populations following their evaluation over three years at four distinct locations representative of current U.S. BR production. GEI of pomological traits were described using two methods: mixed model analysis and Bayesian Finlay-Wilkinson regression. Both methods revealed relatively stable genetic control of the four fruit size traits across the tested production environments and less stable genetic control of the six fruit biochemistry traits. Further, Finlay-Wilkinson regression revealed individuals contributing to GEI for each trait. Ten QTL associated with three fruit morphology traits and five QTL associated with two fruit biochemistry traits were identified. Of the fifteen total QTL, eleven exhibited significant QEI. Closely overlapping QTL revealed linkage of several fruit size traits: fruit mass, drupelet count, and seed fraction. Further, alignment of linked markers to the BR genome revealed genomic regions associated with these traits. These and related findings are expected to guide further genetic characterization of BR fruit quality, management of breeding germplasm, and development of improved BR cultivars for U.S. production.
Jonathan Fresnedo Ramirez (Advisor)
Leah McHale (Committee Member)
Joseph Scheerens (Committee Member)
186 p.
Genetics; Horticulture
multiple environment trial; Rubus occidentalis; fruit quality; QTL mapping; genotype-by-environment interaction; Finlay-Wilkinson regression

Recommended Citations

Citations

  • Willman, M. (2019). Genetic Analysis of Black Raspberry Breeding Germplasm [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563451332753356

    APA Style (7th edition)

  • Willman, Matthew. Genetic Analysis of Black Raspberry Breeding Germplasm. 2019. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1563451332753356.

    MLA Style (8th edition)

  • Willman, Matthew. "Genetic Analysis of Black Raspberry Breeding Germplasm." Master's thesis, Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563451332753356

    Chicago Manual of Style (17th edition)

osu1563451332753356
637
© 2019, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.