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Morphology and Introgressive Hybridization in North American Diphasiastrum

Klein, Laura L.
http://rave.ohiolink.edu/etdc/view?acc_num=miami1354833388

Abstract Details

2012, Master of Science, Miami University, Botany.
Although interspecific hybridization in plants often results in sterility, occasionally hybrids show evidence of fertility. Because of their reproductive competence, such F1’s have the ability to interbreed with each other and with their parents, forming introgressive offspring that are morphologically intermediate between the original parental forms. North American Diphasiastrum complanatum, D. digitatum, and D. tristachyum exhibit evidence of such introgressive hybridization. To test for introgression, morphological measurements for parental and putative hybrid taxa were collected and analyzed using principle components analyses and hybrid indices. Spore fertility was also analyzed within the study set. Results support the presence of introgression among all three pair combinations. Although not infrequent, the numbers of hybrid forms are far exceeded by parental forms and so there are no compelling reasons not to recognize these three taxa at the species level.
R. James Hickey, PhD (Advisor)
Richard C. Moore, PhD (Committee Member)
Michael A. Vincent, PhD (Committee Member)
54 p.
Biology; Botany
Lycopodiaceae; Lycopodium; Diphasiastrum; Morphology; Introgression; Hybridization; Hybrid Index

Recommended Citations

Citations

  • Klein, L. L. (2012). Morphology and Introgressive Hybridization in North American Diphasiastrum [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1354833388

    APA Style (7th edition)

  • Klein, Laura. Morphology and Introgressive Hybridization in North American Diphasiastrum. 2012. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1354833388.

    MLA Style (8th edition)

  • Klein, Laura. "Morphology and Introgressive Hybridization in North American Diphasiastrum." Master's thesis, Miami University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=miami1354833388

    Chicago Manual of Style (17th edition)

miami1354833388
688
© 2012, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.