- 著者
- Young-Bum SON Yeon Ik JEONG Mohammad Shamim HOSSEIN Per Olof OLSSON Gyeongmin KIM Yeon Woo JEONG Woo Suk HWANG
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.21-0154, (Released:2021-08-06)
- 被引用文献数
- 1
Several studies have reported methods to estimate the parturition date of dogs using ultrasonographic measurements. However, these prediction models were mainly determined using ultrasonographic measurements of naturally pregnant small- and medium-sized dogs, and no such studies have been performed using dogs carrying cloned fetuses produced via somatic cell nuclear transfer. The present study evaluated the abilities of three reference formulas (Luvoni and Grioni, Milani et al., and Groppetti et al.), all of which were developed using data from naturally occurring pregnancies, to accurately predict the parturition date in surrogates carrying cloned German Shepherd (GS) fetuses. All three formulas were based on the use of inner chorionic cavity diameter (ICC) measurements, obtained via ultrasonography. For evaluation, a total of 54 ICC measurements were collected from 14 pregnant bitches carrying cloned GS fetuses. We found that the clinical accuracy of the breed-specific Groppetti et al. formula was highest among those of the three formulas tested, with 87% and 100% of the estimated parturition dates (calculated based on the ICC measurements) being within 1 and 2 days, respectively, of the actual delivery date. By contrast, the Luvoni and Grioni formula showed relatively low accuracy, and the Milani et al. formula showed higher accuracy than that reported previously for natural pregnancies.
- 著者
- Eklof Staffan Astot Crister Blackwell John Thomas Moritz Olof Olsson Goran Sandberg Department of Forest Genetics and Plant physiology SwedishUniversity of Agricltural sciences Department of Forest Genetics and Plant physiology SwedishUniversity of Agricltural sciences Department of Forest Genetics and Plant physiology SwedishUniversity of Agricltural sciences Department of Forest Genetics and Plant physiology SwedishUniversity of Agricltural sciences Department of Molecular Biology Goteborg University Department of Forest Genetics and Plant physiology SwedishUniversity of Agricltural sciences
- 出版者
- Japanese Society of Plant Physiologists
- 雑誌
- Plant and cell physiology (ISSN:00320781)
- 巻号頁・発行日
- vol.38, no.3, pp.225-235, 1997-03
- 参考文献数
- 59
- 被引用文献数
- 3
Cytokinins and auxins are important regulators of plant growth and development, but there is incomplete and conflicting evidence that auxins affect cytokinin metabolism and vice versa. We have investigated these interactions in Nicotiana tabacum L. by separate in planta manipulation of levels of the hormones followed by analysis of the induced changes in the metabolism of the other hormone. Cytokinin-overproducing plants (expressing the Agrobacterium tumefaciens ipt gene) had lower than wild-type levels of free IAA, and reduced rates of IAA synthesis and turn-over, but there were no differences in the profiles of metabolites they produced from fed IAA. Similarly, auxin-over-producing plants (expressing the A. tumefaciens iaaM and iaaH genes), had lower levels of the major cytokinins than wild-type plants and lower cytokinin oxidase activity, but there were no differences in the profiles of metabolites they produced from fed cytokinins. The data demonstrate that cytokinin or auxin overproduction decreases the content of the other hormone, apparently by decreasing its rate of synthesis and/or transport, rather than by increasing rates of turnover or conjugation. Implications for the importance of cytokinin : auxin ratios in plant development are considered.