Carlos Andres Parra Martinez

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There is great interest in the importance of nectar nutrients to fecundity in the Lepidoptera, but nutrient allocation has been difficult to measure quantitatively. Here we trace the allocation of nectar nutrients in the hawkmoth Amphion floridensis using naturally occurring variation in plant stable carbon isotopes and thereby derive a descriptive model of(More)
Rearrangements of about 2.5 kilobases of regulatory DNA located 5' of the transcription start site of the Drosophila even-skipped locus generate large-scale changes in the expression of even-skipped stripes 2, 3, and 7. The most radical effects are generated by juxtaposing the minimal stripe enhancers MSE2 and MSE3 for stripes 2 and 3 with and without small(More)
Upstream regulatory sequences that control gene expression evolve rapidly, yet the expression patterns and functions of most genes are typically conserved. To address this paradox, we have reconstructed computationally and resurrected in vivo the cis-regulatory regions of the ancestral Drosophila eve stripe 2 element and evaluated its evolution using a(More)
Development of a seed DNA-based genotyping system for marker-assisted selection (MAS) has provided a novel opportunity for understanding aberrant reproductive phenomena such as hetero-fertilization (HF) by observing the mismatch of endosperm and leaf genotypes in monocot species. In contrast to conventional approaches using specific morphological markers,(More)
No other grain has been developed and used to produce so many other co-products than has occurred with corn (Corn tech book). Corn can be processed to concentrate starch and sugars, oils, and protein for human or animal consumption. As a result there is a large variety of corn co-products are available for use as ingredients in animal feeds depending on the(More)
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