Academic literature on the topic 'Plant genetics. Phlox drummondii'

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Journal articles on the topic "Plant genetics. Phlox drummondii"

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Watkins, Lee, and Donald A. Levin. "Outcrossing rates as related to plant density in Phlox drummondii." Heredity 65, no. 1 (August 1990): 81–89. http://dx.doi.org/10.1038/hdy.1990.73.

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Kelly, Martin G., and Donald A. Levin. "Directional selection on initial flowering date in Phlox drummondii (Polemoniaceae)." American Journal of Botany 87, no. 3 (March 2000): 382–91. http://dx.doi.org/10.2307/2656634.

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Levin, Donald A. "S-gene polymorphism in Phlox drummondii." Heredity 71, no. 2 (August 1993): 193–98. http://dx.doi.org/10.1038/hdy.1993.124.

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Tiku, A., M. K. Razdan, and S. N. Raina. "Production of triploid plants from endosperm cultures of Phlox drummondii." Biologia plantarum 58, no. 1 (March 1, 2014): 153–58. http://dx.doi.org/10.1007/s10535-013-0372-7.

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Schlichting, Carl D., and B. Devlin. "Male and Female Reproductive Success in the Hermaphroditic Plant Phlox drummondii." American Naturalist 133, no. 2 (February 1989): 212–27. http://dx.doi.org/10.1086/284911.

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Schwaegerle, K. E., and D. A. Levin. "Environmental Effects on Growth and Fruit Production in Phlox Drummondii." Journal of Ecology 78, no. 1 (March 1990): 15. http://dx.doi.org/10.2307/2261033.

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Kelly, Martin G., and Donald A. Levin. "Fitness Consequences and Heritability Aspects of Emergence Date in Phlox Drummondii." Journal of Ecology 85, no. 6 (December 1997): 755. http://dx.doi.org/10.2307/2960599.

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KOUL, K. K., and S. N. RAINA. "Male and female meiosis in diploid and colchitetraploid Phlox drummondii Hook. (Polemoniaceae)." Botanical Journal of the Linnean Society 122, no. 3 (November 1996): 243–51. http://dx.doi.org/10.1111/j.1095-8339.1996.tb02074.x.

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Raina, S. N., A. Parida, K. K. Koul, S. S. Salimath, M. S. Bisht, V. Raja, and T. N. Khoshoo. "Associated chromosomal DNA changes in polyploids." Genome 37, no. 4 (August 1, 1994): 560–64. http://dx.doi.org/10.1139/g94-080.

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The 2C and 4C nuclear DNA amounts were estimated in eight diploid species, belonging to three diverse genera (Vicia, Tephrosia, and Phlox) and their corresponding colchitetraploids. In P. drummondii, T. purpurea, and T. oxygona tetraploids the deviation from the expectation was highly significant. The DNA in P. drummondii was further discarded in subsequent (C1, C2) generations, thus attaining an overall reduction of about 25%. The DNA content in the subsequent generations was the same as that of C2. It is concluded that rapid DNA loss in the first and subsequent generations was not only associated with the substantial increase (30–66%) in the seed set, but it also helped in the establishment and stabilization of the tetraploid. The possible relationship between such a nucleotypic change and success of polyploids is discussed. The DNA change from the expected value in the P. drummondii tetraploid was achieved by equal decrement to each chromosome independent of size, i.e., small chromosomes loose the same amount of DNA as the large chromosomes.Key words: colchitetraploid, genome size, DNA loss, seed fertility, stability, DNA distribution.
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Liu, Dawei, Qiyue Liu, Peng Zhang, Kefei Tan, and Jingsheng Chen. "First Report of Powdery Mildew Caused by Golovinomyces magnicellulatus on Phlox drummondii in China." Plant Disease 104, no. 5 (May 2020): 1547. http://dx.doi.org/10.1094/pdis-06-19-1319-pdn.

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Dissertations / Theses on the topic "Plant genetics. Phlox drummondii"

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Lendvai, Gábor. "Evolutionary consequences of variation of floral traits in Phlox drummondii." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3037518.

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Lendvai, Gábor. "Evolutionary consequences of variation of floral traits in Phlox drummondii." 2001. http://hdl.handle.net/2152/10676.

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Hopkins, Robin. "The Evolution and Genetics of Reinforcement in Phlox Drummondii." Diss., 2010. http://hdl.handle.net/10161/3137.

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One of the major goals of evolutionary biology is understanding the process of species formation. There is particular interest in how selection can favor species formation through the process of reinforcement. When two diverging taxa produce maladaptive hybrids, selection will favor greater reproductive isolation between the taxa. Reinforcement often results in a pattern of reproductive character displacement, which is defined as two species having greater reproductive isolation in sympatry then in allopatry. Floral-color divergence in the native Texas wildflower, Phlox drummondii, constitutes one of the best documented cases of reinforcement in plants. P. drummondii and a closely related species, P. cuspidata produce similar light-blue flowers throughout the allopatric parts of their ranges. However, in the area of sympatry P. drummondii has dark-red flowers, which has been shown to decrease hybridization between the two species. In the following work, I investigate the causes and consequences of the process of reinforcement and the pattern of character displacement in P. drummondii. First, I identify the genetic basis of the flower color variation as regulatory changes in two genes controlling the type and amount of anthocyanin floral pigments. I then evaluate neutral genetic variation across the range of P. drummondii and conclude there is extensive gene flow between allopatric and sympatric areas of the range, which indicates that selection and not genetic drift is responsible for the flower color variation. By investigating genetic variation at the loci underlying flower color variation I find a molecular signature of a selective sweep at one of the two flower color loci, further indicating that selection is responsible for this flower color variation. Finally, I measure selection on flower color in both sympatry and allopatry. I find no evidence that flower color variation is a response to ecological character displacement or local adaptation in the area of sympatry. I find evidence of pollinator preference for the ancestral allopatric flower color in allopatry, which may explain the persistence of the pattern of character displacement. These investigations of reproductive character displacement and reinforcement address important areas of research in evolutionary biology including the genetic basis of adaptation, the formation of species, and pleiotropy and conflicting selection pressures in species.


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Book chapters on the topic "Plant genetics. Phlox drummondii"

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Pittman, Karen E., and Donald A. Levin. "Cross-compatibility in an Annual Hermaphrodite Plant, Phlox drummondii Hook." In Biotechnology and Ecology of Pollen, 477–82. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4613-8622-3_77.

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