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  • 1
    ISSN: 1432-2242
    Keywords: Additive variance ; Maximum likelihood ; General Linear Model ; Selection ; Gaussian elimination ; Plant pedigree matrix
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Additive genetic components of variance and narrow-sense heritabilities were estimated for flowering time (FT) and cut-flower yield (Y) for six generations of the Davis Population of gerbera using Derivative-Free Restricted Maximum Likelihood (DFRML). Additive genetic variance accounted for 54% of the total variability for FT and 30% of the total variability for Y. The heritability of FT (0.54) agreed with previous ANOVA-based estimates. However, the heritability of Y (0.30) was substantially lower than estimates using ANOVA. The advantages of DFRML and its applications in the estimation of components of genetic variance and heritabilities of plant populations are discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 12 (1997), S. 276-282 
    ISSN: 1437-9813
    Keywords: Abdominal wall defects ; Gastroschisis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Although the mortality associated with gastroschisis (GS) has fallen markedly over recent years, postoperative morbidity and the incidence of complications remain high. Many different factors may contribute to this morbidity; the aim of this study was to determine which factors contributed most. Measures of morbidity used were time to full oral feeding (FOF), time on parenteral nutrition (PN), age at discharge, and incidence of complications. Between 1969 and 1995, 44 neonates with GS were treated; there were 6 deaths. The average initial temperature of the patients who died was 34.6 °C compared with 36.0 °C for the rest of the group (P = 0.02). Staged repair and prematurity were associated with increased time to FOF, time on PN, and age at discharge (P 〈 0.001). When the corrected post-term age was used, the difference between preterm and term babies was no longer significant. Mode of delivery did not influence any measure of morbidity. Seventeen patients (46%) had complications related to PN administration and 18 (43%) developed complications related to their surgery. There were no significant differences in these measures of morbidity when comparing patients born in the first half of the study period with those born in the last half. Multivariate analysis revealed that time to FOF, time on PN, and age at discharge were all strongly independently associated with staged repair and with the presence of complications of PN (allF 〉 7.2 andP 〈 0.01). Mode of delivery, gestational age, admission temperature, the need for postoperative ventilation, and complications of surgery were not independently associated with any of the measures of morbidity examined. Our data suggest that term delivery and primary closure of the defect are likely to minimise the morbidity experienced by infants with GS.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 12 (1997), S. 580-582 
    ISSN: 1437-9813
    Keywords: Gastroschisis ; Low birth weight ; Fetal growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A large proportion of babies with gastroschisis (GS) have low birth weights. It is not clear, however, whether only certain subgroups or the whole population of babies with GS have low birth weights. The aim of this study was to ascertain if the birth weights of babies with GS are significantly lower than those of the general population and to determine if the birth weights of babies with GS from two different populations were significantly different. From 1969 to 1995, 44 babies with GS were treated at Auckland Children's Hospital, New Zealand. From 1980 to 1993, 69 babies were treated at Birmingham Children's Hospital, England. For each group, the mean birth weight relative to the mean birth weight for gestation (WtStdev) was significantly different from zero (Auckland = −0.806, Birmingham = −0.762,P 〈 0.001, one-sample analysis). The mean WtStdev scores from each centre were not significantly different from each other. Our data demonstrate that the birth weights of babies with GS are significantly lower than those of the general population and are similar in different populations. These findings support the notion that a normally functioning intestinal tract is essential for normal fetal growth.
    Type of Medium: Electronic Resource
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