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Developmental variability during early embryonic development of zebra fish, Danio rerio 总被引:1,自引:0,他引:1
Irmler I Schmidt K Starck JM 《Journal of experimental zoology. Part B. Molecular and developmental evolution》2004,302(5):446-457
Early vertebrate embryos pass through a period of remarkable morphological similarity. Possible causes for such similarity of early embryos include modularity, developmental constraints, stabilizing selection, canalization, and exhausted genetic variability. Supposedly, each process creates different patterns of variation and covariation of embryonic traits. We study the patterns of variation of the embryonic phenotype to test ideas about possible evolutionary mechanisms shaping the early embryonic development. We use the zebra fish, Danio rerio, as a model organism and apply repeated measures of individual embryos to study temporal changes of phenotypic variability during development. In particular, we are looking at the embryonic development from 12 hours post fertilization until 27 hours post fertilization. During this time period, the development of individual embryos is documented at hourly intervals. We measured maximum diameter of the eye, length of embryo, number of somites, inclination of somites, and the yolk size (as a maternal effect). The coefficient of variation (CV) was used as a measure of variability that was independent of size. We used a principal component analysis for analysis of morphological integration. The experimental setup kept environment x genotype interactions constant. Nongenetic parental contributions had no significant effects on interindividual variability. Thus all observed phenotypic variation was based on additive genetic variance and error variance. The average CV declined from 14% to 7.7%. The decline of the CV was in particular expressed during 15-19 h post fertilization and occurred in association with multiple correlations among embryonic traits and a relatively high degree of morphological integration. We suggest that internal constraints determine the patterns of variability during early embryonic development of zebra fish. 相似文献
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Bizuti Matheus Ribeiro Starck Édina da Silva Fagundes Kimberly Kamila Puhle Josiano Guilherme Lima Lucas Medeiros de Oliveira Natan Rodrigues de Sousa Silva Guilherme Vinicio Silva Débora Tavares Resende e 《Molecular and cellular biochemistry》2022,477(6):1725-1737
Molecular and Cellular Biochemistry - Respiratory infections of viral origin have become the leading cause of infectious diseases in the world. In 2020, the World Health Organization (WHO) declared... 相似文献
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The feasibility of using a combinatorial phage display library of decapeptides to identify ligands which can interact with the surface of a crystal was assessed using geological calcium carbonate as a model. Two relatively strong binding clones were identified by ELISA, sequenced and the encoded oligopeptides were prepared by solid phase synthesis and their properties compared with those of casein hydrolysate. 相似文献
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Dietrich Starck 《Journal of Ornithology》1959,100(1):47-59
Ohne ZusammenfassungNach einem Referat, gehalten auf der 71. Jahresversammlung der DO-G 1958 in Kiel. 相似文献
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