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1

Correlation between porcine PPARGC1A mRNA expression and its downstream target genes in backfat and longissimus dorsi muscle

100%
Erkens T., Vandesompele J., Van_ Z. A., Peelman L. J.
Journal of Applied Genetics
|
2009
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vol. 50
|
issue 4
361-369
EN
Knowledge of in vivo relationship between the coactivator PPARGC1A and its target genes is very limited, especially in the pig. In this study, a real-time PCR experiment was performed on longissimus dorsi muscle (MLD) and backfat with 10 presumed PPARGC1A downstream target genes, involved in energy and fat metabolism, to identify possible relationships with PPARGC1A mRNA expression in vivo in the pig (n = 20). Except for UCP3 and LPL, a very significant difference in expression was found between MLD and backfat for all genes (P < 0.01). Hierarchical cluster analysis and the significant pairing of mRNA expression data between sampling locations suggested a genetic regulation of the expression of several target genes. A positive correlation with PPARGC1A was found for CPT1B, GLUT4, PDK4, and TFAM (P < 0.0001). A negative correlation was found for UCP2, FABP4, LEP (P < 0.0001), and TNF (P = 0.0071). No significant correlation was detected for UCP3 and LPL. This study provides evidence for a clear difference in mRNA expression of crucial genes in fat and energy metabolism between 2 important tissues. Our data suggest a clear impact of PPARGC1A on energy and lipid metabolism in vivo in the pig, through several of these downstream target genes.
2

Correlations and heritability of the characters determining the seed yield of the long-raceme alfalfa (Medicago sativa L.)

88%
Bodzon Z.
Journal of Applied Genetics
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2004
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vol. 45
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issue 1
49-59
EN
Phenotypic correlation coefficients and heritability of the characters controlling seed yield of long-raceme forms of alfalfa was determined. It was found that seed yield per plant, which was positively correlated with 10 out of 12 analysed characters, depended upon the number of pods per raceme and the number of seeds per pod. Variability of these characters determined about 60% of the variability of seed yield. Multiple linear regression and phenotypic correlations show that simultaneous selection for increased pod number per raceme and increased seed number per pod and raceme length resulted in enhanced seed yield potential. The share of the additive genetic effects in the phenotypic variance for number of pods per raceme was low and about 21-23%, while for number of seeds per pod and per raceme amounted to about 50%. The expected genetic progress in recombination breeding for number of seeds per pod and number of seeds per raceme will be of medium magnitude, while one cannot expect any rapid and considerable progress in the number of pods per raceme. Considering the high positive correlation between raceme length and number of pods and seeds per raceme, one should conclude that raceme length can be an important criterion in selection of plants showing a high seed productivity.
3

Severe clinical course of Hirschsprung disease in a Mowat-Wilson syndrome patient

88%
Smigiel R., Szafranska A., Czyzewska M., Rauch A., Zweier C., Patkowski D.
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vol. 51
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issue 1
111-113
EN
We present a clinical case of a female infant with multiple anomalies and distinctive facial features, with an exceptionally severe clinical course of Hirschsprung disease. The girl was also diagnosed with Mowat-Wilson syndrome, confirmed by molecular analysis as a heterozygous deletion of the ZEB2 gene. Moreover, molecular karyotyping revealed a deletion involving further genes (KYNU, ARHGAP15, and GTDC1).
4

Prediction of meat quality from biopsy in live pigs with different RYR1 genotypes

88%
Kuciel J., Urban U. T., Urban T., Krenkova K. J., Krenkova J.
|
EN
To predict meat quality after slaughter, biopsy samples were taken from musculus longissimus lumborum et thoracis of live pigs at approximately 40 kg and 80 kg of weight. The obtained values from biopsies for pH1 and EC50 (electric conductivity) were compared with measurements after slaughter at a weight of approximately 110 kg. RYR1 genotypes were determined from blood samples using PCR-RFLP. Mating of Nn sows with two nn boars resulted in 72 Nn and 40 nn offspring. Significant differences between the two genotypes were found for pH1 and EC50 values for the three weights. The coefficients of correlation for the Nn genotype of the RYR1 gene between the values after slaughter and both the first and the second biopsy for pH1 and EC50 were very low (r = 0.06, r = 0.14, and r = 0.26, r = 0.26, P 0.05). For the nn genotype were r = ?0.23, r = ?0.15, and r = ?0.25, r = ?0.11 respectively. The values of pH1 and EC50 were highly correlated (r = ?0.52 to ?0.84, P 0.001) both within biopsies and after slaughter.
5
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Brainstem neurones and postganglionic sympathetic nerves:does correlation mean connection ?

75%
McAllen R. M., May C. N.
Acta Neurobiologiae Experimentalis
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1996
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vol. 56
|
issue 1
129-135
EN
Short-term correlations in activity have been widely used as evidence to connect brainstem units with postganglionic sympathetic nerves. These may be detected by spike-triggered averaging, cross correlation of coherence analysis. The specificity of this type of evidence has been investigated by cross-correlating the activity of identified cutaneous vasoconstrictor postganglionic fibres with that of medullary premotor neurones of like and of unlike functional type, as determined by physiological testing (preoptic warming), in anaesthetised cats. Single medullary premotor neurones of both types were recorded from the subretrofacial nucleus: they were identified by their berosensitivity and, in most cases, their spinally projecting axons. By the test criteria chosen, the correlation method gave both false-positive and false-negative results as commonly as it gave correct ones. We conclude that it is not a reliable way to determine brainstem-postganglionic connectivity.
6

Genetic parameters and correlations of collar rot resistance with important biochemical and yield traits in opium poppy (Papaver somniferum L.)

75%
TrivediT., Tiwari R. K., Dhawan O. P.
Journal of Applied Genetics
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2006
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vol. 47
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issue 1
29?38
EN
Collar rot, caused by Rhizoctonia solani Kuhn, is one of the most severe fungal diseases of opium poppy. In this study, heritability, genetic advance and correlation for 10 agronomic, 1 physiological, 3 biochemical and 1 chemical traits with disease severity index (DSI) for collar rot were assessed in 35 accessions of opium poppy. Most of the economically important characters, like seed and capsule straw yield per plant, oil and protein content of seeds, peroxidase activity in leaves, morphine content of capsule straw and DSI for collar rot showed high heritability as well as genetic advance. Highly significant negative correlation between DSI and seed yield clearly shows that as the disease progresses in plants, seed yield declines, chiefly due to premature death of infected plants aswell as low seed and capsule setting in the survived population of susceptible plants. Similarly, a highly significant negative correlation between peroxidase activity and DSI indicated that marker-assisted selection of disease-resistant plants based on high peroxidase activity would be effective and survived susceptible plants could be removed from the population to stop further spread.
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