Variability of fruit traits in chestnut progenies derived from intraspecific (Castanea sativa x C. sativa) and interspecific (C. sativa x C. crenata) crosses
2005
Bolvansky, M.(Slovenska akademia vied, Nitra (Slovak Republic). Ustav ekologie lesa, Pobocka biologie drevin | Uzik, M.Vyskumny ustav rastlinnej vyroby, Piestany (Slovak Republic))
Six progenies at age of 14 years, derived from both crosses C. sativa x C. sativa and C. sativa x C. crenata were involved to the study. During three consecutive years 10 fruit characteristics were measured in 57, 31 and 62 trees and obtained data were processed by GLM procedure of analysis of variance and two procedures (without selection and with forward selection of traits) of DA to find out how the fruit traits enable to differentiate among different chestnut progenies. Except length of fruit scare, progenies differed significantly in all traits studied. In fruits from hybrid progenies C. sativa x C. crenata, significantly lower number and length of pellicle intrusions into kernel were observed. Out of all progenies, two procedures of DA enabled to classified the best a hybrid progeny TV 21 x cren (97,6% of correctly classified trees), while another hybrid progeny A1 x cren was classified the worst of all. However the percentage of correct classification varied greatly among years what can be referred to seasonal variation of most fruit traits.
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