The purpose of this study is to contribute to identifying a series of objective parameters suitable for description of the growth and production habit in apricot. Observations were carried out in the apricot germplasm collection of Pisa University, located in Venturina (Livorno) on 23 accessions (cultivars and selections). The main characters recorded were: 1) tree height, 2) canopy diameter, in order to calculate the ratio (V.I.) between tree height and canopy diameter, 3) length of 15 two-year branches and 4) respective angle of insertion on the vertical. On each branch 5) the number of nodes was counted and 6) number and 7) distribution of different shoot types (spurs, short twigs and mixed twigs) were measured. Additional characters on 20 mixed twigs were also determined: 8) length, 9) diameter, 10) length of 10 internodes in the central portion of the twig, 11) angle of insertion on the main branch, 12) number and 13) length of feathers. Cultivars studied were characterised by markedly different vegetative forms: a) tree size-1) big, 2) normal, 3) small 4) dwarf; b) tree growth habit: 1) upright, 2) regular, 3) open, 4) drooping, 5) spur. Results suggested that some of the characters observed could represent good parameters for describing apricot cultivar growth habit.
Parameters for description of the growth habit of apricot cultivars
VITI, RAFFAELLA;
2006-01-01
Abstract
The purpose of this study is to contribute to identifying a series of objective parameters suitable for description of the growth and production habit in apricot. Observations were carried out in the apricot germplasm collection of Pisa University, located in Venturina (Livorno) on 23 accessions (cultivars and selections). The main characters recorded were: 1) tree height, 2) canopy diameter, in order to calculate the ratio (V.I.) between tree height and canopy diameter, 3) length of 15 two-year branches and 4) respective angle of insertion on the vertical. On each branch 5) the number of nodes was counted and 6) number and 7) distribution of different shoot types (spurs, short twigs and mixed twigs) were measured. Additional characters on 20 mixed twigs were also determined: 8) length, 9) diameter, 10) length of 10 internodes in the central portion of the twig, 11) angle of insertion on the main branch, 12) number and 13) length of feathers. Cultivars studied were characterised by markedly different vegetative forms: a) tree size-1) big, 2) normal, 3) small 4) dwarf; b) tree growth habit: 1) upright, 2) regular, 3) open, 4) drooping, 5) spur. Results suggested that some of the characters observed could represent good parameters for describing apricot cultivar growth habit.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
