Analysis of the Morphogenesis of Several Year Old Bearing Wood of Fruit-Bearing Tree
Analiza morfogeneze višegodišnjeg nosača rodnog drveta kruške
Abstract
The analysis of the growths which bear the apical mixed buds for the first time and twoyear-
old outspread branches in six pear cultivars (‘Trevuška’, ‘Santa Maria’, ‘Williams’,
‘Abate Fetel’, ‘Kaluđerka’ and ‘Krasanka’) have been performed in order to define genotype
specificity of the organogenesis of the fruit-bearing tree. The obtained results demonstrate
that this analysis of these categories of growths is not enough to determine for sure the type
of the organogenesis in the examined pear cultivars as well as the genotype specificity of the
growth and development of individual categories of growths. Therefore, a detailed analysis
of morphogenesis of several year old bearing wood of the fruit-bearing tree was decided to
be made. A scheme was also made for each branch, while the individual categories of
growths were marked with the following signs:
α = lateral vegetative bud,
β = apical vegetatative bud formed from α,
β’ = apical vegetatative bud formed from β,
β’’ = apical vegetatative bud formed from β’
γ = mixed bud formed from α ,
γ’ = mixed bud formed from γ,
γ’’ = mixed bud formed from γ’,
φ = fruit-bearing growth,
φ+ = fruit-bearing growth that produced the fruit,
φ‒ = fruit-bearing growth that did not produce the fruit,
→ = becoming
By means of these signs, the rows for 30 five-year-old branches were created for
each examined cultivar.
The obtained data are grouped into individual rows and they are expressed in
numerical values. The following coefficients were calculated:
1) Genotypic coefficient potential of vegetative cones of lateral vegetative buds for
the moving to the generative program of differentiation,
2) Genotypic coefficient potential of vegetative cones of apical vegetative buds for
the moving to the generative program of differentiation, Kod šest sorti krušaka (Santa marija, Vilijamovka, Fetelova, Trevuška,
Kaluđerka i Krasanka) u cilju definisanja genotipskih specifičnosti organogeneze
rodnog drveta izvršili smo analizu prirasta koji prvi put nose vršni mješoviti pupoljak i
dvogodišnju razgranatu granu. Na osnovu izvršenih analiza došli smo do spoznaje da na
osnovu analize samo tih kategorija prirasta ne možemo pouzdano odrediti tip
organogeneze rodnog drveta ispitivanih sorti kruške, niti utvrditi genotipske
specifičnosti rasta i razvoja pojedininih kategorija prirasta, pa smo se odlučili da
uradimo i detaljnu analizu morfogeneze višegodišnjeg nosača rodnog drveta odabranih
sorti kruške. Za svaku analiziranu petogodišnju granu je urađena šema, a pojedine
kategorije prirasta označene su odgovarajućim znakovima. Podaci o broju znakova
sistematizovani su u nizove iz kojih su izračunati odgovarajući koeficijenti, čije su
vrijednosti bila osnova za grupisanje sorti prema dominantnim tipovima rodnih
grančica, a na taj način je ostvarena mogućnost modeliranje opdgovarajućih
pomotehničkih tretmana.