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The study investigates the intra-population variability of the growth and quality traits of Norway spruce populations from Bliżyn and Zwierzyniec Lubelski. The two populations are included in the IUFRO 1972 experiment and exhibit a high growth dynamics and a narrow crown form. The research was carried out on the experimental plot established in 1996 in Chrosno (Kutno Forest District) using 8228 two-year-old seedlings planted in a single-tree plot design at a spacing of 1.5 × 1.5 m. The seedlings represent 191 open-pollinated families, among them 93 families of Norway spruce from the Bliżyn region and 98 families from the Zwierzyniec Lubelski region. The height, height increment and DBH of trees were measured periodically, and some quality traits were assessed. The last results come from the measurements done on the trees aged 10 years. It was found that the differences between the two populations of Norway spruce are statistically nonsignificant but both of them show wide within-population variability. This suggests that they have the potential to flexibly respond to future changes in the growth conditions or to seed transfer to other seed zones. Survival in the environmental conditions of the experiment was independent of family.
Alzheimerís disease (AD) is the main cause of dementia in the elderly. Over-activation of Glycogen Synthase Kinase 3 beta and Cyclin-Dependent Kinase 5 has been implicated in the aberrant phosphorylation of tau ñ the major component of the neurofi brillary tangles, which besides deposits of amyloid β are pathological hallmarks of AD. In this study we assessed the association between single nucleotide polymorphism (SNP) in those kinases genes and the risk of early (EOAD) and late onset (LOAD) Alzheimerís disease. TaqMan SNP genotyping assay or polymerase chain reactionrestriction fragments length polymorphism (PCR-RFLP) assay were used to genotype 4 SNP sites in 198 Polish LOAD cases, 71 EOAD cases and 104 controls. The distribution of genotypes in rs334558 SNP in GSK3β gene signifi cantly differed between patients with late onset AD and aged related, healthy control group. No signifi cant association between rs9278, rs2069454 and rs2069442 SNPs in CDK5 gene and AD was found and none of the examined alleles can be considered now as a genetic risk factor in AD in Polish population. The analysis of environmental factors showed higher serum level of total cholesterol and lower LDL (low density lipoprotein) level in EOAD and LOAD groups compared to control group. Moreover lower level of vitamin B12 and higher homocysteine level were observed only in LOAD group compared to controls. This study was supported MS&HE scientifi c network 28/E-32/SN0053/2007
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