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Digitale Medien

Single gene mutation for green cotyledons as a marker for the embryonic genotype in faba bean, Vicia faba (1999)

Duc, G. ; Moussy, F. ; Zong, X. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 118 (1999), S. 0

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ISSN: 1439-0523

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft

Notizen: A new spontaneous mutation is described in faba bean, Vicia faba L., characterized by a marked green colour in the entire cotyledon tissues of the mature seeds, while the wild phenotype is yellow. This seed character reflects the embryonic genotype and is determined by a single recessive allele named i1-1. It is distinct from the y gene, which codes for green testa. As is the case for gene y, the gene i1-1 displays no epistatic effects with the zero-tannin genes zt1 and zt2 which influence seed and flower colour in faba bean. In this allogamous species, such a mutation is a useful tool in cross-fertilization studies.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1046/j.1439-0523.1999.00422.x

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Digitale Medien

Cerebral blood flow and neurological outcome in the preterm infant (1999)

Baenziger, O. ; Mueller, A. M. ; Morales, C. G. ; [weitere]

Springer

European journal of pediatrics 158 (1999), S. 138-143

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Details

ISSN: 1432-1076

Schlagwort(e): Key words Cerebral blood flow ; Preterm infants ; Neurological outcome ; Brain development ; 133Xenon method

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Abstract Cerebral blood flow (CBF) studies have provided some insight into pathophysiological mechanisms of cerebral damage in newborn children; their value in predicting brain damage, however, remains elusive. The purpose of our study was to evaluate the role of CBF measurements in predicting developmental outcome in preterm neonates at 18 months. Preterm babies with a gestational age of less than 34 weeks and a birth weight of less than 1500 g (n = 71) were enrolled in the study. CBF was measured by the nonivasive intravenous 133Xe method on three different occasions. We classified our measurements into three groups: depending on the time when performed group 1: between 2 and 36 h (n = 52); group 2: between 36 and 108 h (n = 44); group 3: between 108 and 240 h (n = 41). At the age of 18 months neurodevelopment testing was performed according to the Bayley mental and motor scales. Surviving infants had a higher mean CBF over the three groups than non surviving children (15.2 ± 3.5 ml/100 g brain tissue/min vs 13.0 ± 2.1 ml/100 g brain tissue/min, P 〈 0.05). There was no correlation of CBF with mental or motor development in our study population in either of the three groups. Conclusion In preterm infants basal CBF is higher in surviving than in non surviving infants, but there is no correlation of resting CBF and later neurological outcome.