| Hereditary bovine syndactyly: diagnosis in bovine fetuses. | |
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MedLine Citation:
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PMID: 3033869 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Diagnostic guidelines were established for progeny testing of hereditary bovine syndactyly. Through the use of superovulation and embryo transfer, 139 fetuses were recovered at 50 to 77 days gestation. Normal (+/+, +/sy) and syndactylous (sy/sy) anatomy of Holstein fetuses was defined, and the accuracy of macroscopic versus microscopic limb diagnosis was assessed. Chondrification and ossification differences between normal (+/+, +/sy) and syndactylous (sy/sy) fetuses were only age-related. Normal (+/+, +/sy) fetal limbs differed from normal (+/+, +/sy) adult bovine limbs in two ways. Fetal metacarpal and metatarsal III and IV bones were not fused, and fetal metacarpal and metatarsal II and V bones often extended up to three-fourths the length of metacarpal and metatarsal III and IV bones. In syndactylous (sy/sy) fetuses, synostosis asymmetries occurred within and between fetal limbs, and between fetuses, representing variable gene expressivity. Synostosis pattern within limbs did not correspond with those of the adult bovine; the second phalangeal pair was synostotic most frequently in the fetus, followed by the first, and then the third pair. Synostosis patterns between fetal limbs agreed with those of the adult; there was a right-left and front-rear limb gradient. Partial synostoses occurred sporadically in all three paired phalanges. Those of the first and third pair always involved the tip closest to the second phalangeal pair. A unique example of variable gene expressivity occurred in one syndactylous fetus. Both front limbs were syndactylous, while both rear limbs were normal grossly. Microscopically the right rear limb was normal while the left rear limb consisted of closely apposed phalangeal blastemata without coalescence.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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L Hart-Elcock; H W Leipold; R Baker |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Veterinary pathology Volume: 24 ISSN: 0300-9858 ISO Abbreviation: Vet. Pathol. Publication Date: 1987 Mar |
Date Detail:
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Created Date: 1987-05-22 Completed Date: 1987-05-22 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0312020 Medline TA: Vet Pathol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 140-7 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cattle Cattle Diseases / diagnosis*, genetics Female Fetal Diseases / diagnosis*, genetics Heterozygote Homozygote Male Phenotype Pregnancy Syndactyly / diagnosis, genetics, veterinary* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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