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The Effects Of Genetic And Environmental Variation On Growth And Flowering, Kelly Marie Schmid
The Effects Of Genetic And Environmental Variation On Growth And Flowering, Kelly Marie Schmid
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The ability to respond to seasonal cues, including changes in daylength and temperature, can be vital for sessile organisms. One of the mechanisms plants use to deal with seasonal variation is adjusting their allocation to vegetative growth and reproduction, and the timing of the transition to flowering. To respond to selection and adapt to changing environments, populations must harbor genetic variation for these traits. This research addresses the following questions: (1) How much quantitative genetic variation for flowering time exists within a population? (2) Does photoperiod affect the timing of and allocation to growth and flowering? (3) Is their genetic …
Identifying The Influence Of Selective Episodes And Mechanisms On Reproductive Success In Tribolium Castaneum And Drosophila Melanogaster, Elizabeth Metta Droge-Young
Identifying The Influence Of Selective Episodes And Mechanisms On Reproductive Success In Tribolium Castaneum And Drosophila Melanogaster, Elizabeth Metta Droge-Young
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Parsing out what makes some individuals more reproductively successful than others is a key pursuit in evolutionary biology. While reproductive success can ultimately be defined as the number of offspring produced over an individual’s lifetime, there are many selective episodes that shape this outcome. Because the majority of animals have multiple mates, achieving matings is but one influence on reproductive success. After copulation occurs, sperm from multiple males compete within the female reproductive tract to fertilize eggs, while females morphologically or behaviorally bias fertilization to preferred males, further shaping reproductive success. Additionally, the act of mating itself may influence parental …