Pattern of genomic loci controlling morphological responses to UV-B radiation in maize (Zea mays L.)
- UNCW Author/Contributor (non-UNCW co-authors, if there are any, appear on document)
- Yibing Fu (Creator)
- Institution
- The University of North Carolina Wilmington (UNCW )
- Web Site: http://library.uncw.edu/
- Advisor
- Ann Stapleton
Abstract: The sessile nature of plants determines that they tolerate rather than escape from
environmental changes. Therefore, studying plant responses to ultraviolet radiation (UV) is
important for understanding how plants respond to environmental challenges. Although
numerous UV responses have been reported, little is known about the genetics controlling
quantitative natural variation in those UV responses. To address this question, I examined
morphological UV responses in maize (Zea mays). First, dose-response and reciprocity
experiments were conducted to find a standard experimental UV dose of six hours per day for
four days. Second, a 84 subset of 94 mapping lines from the recombinant inbred of maize (IBM)
population was planted in a greenhouse in a completely randomized design. Maize UV responses
including ratio of leaf rolling, plant height, dry weight of second and third leaf, and dry weight of
root, were compared for “control” and “UV” environments. A composite interval mapping
(CIM) analysis detected 12 significant quantitative trait loci (QTL) affecting at least one of five
traits. A total of 8 significant QTL were identified by multitrait composite interval mapping
(MCIM). Only two QTL were detected by both CIM and MCIM. The allelic sensitivity model
was supported most often. Genome-wide QTL mapping is an efficient way to generate a more
complete understanding of the genetic basis of plant responses to UV irradiation.
Pattern of genomic loci controlling morphological responses to UV-B radiation in maize (Zea mays L.)
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Created on 1/1/2009
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Additional Information
- Publication
- Thesis
- A Thesis Submitted to the University of North Carolina at Wilmington in Partial Fulfillment Of the Requirements for the Degree of Master of Science
- Language: English
- Date: 2009
- Keywords
- Corn--Research, Plants--Adaptation, Ultraviolet radiation
- Subjects
- Corn -- Research
- Ultraviolet radiation
- Plants -- Adaptation