Proleptic and Sylleptic Shoot Formation Is Affected by Rootstock Genotype in Two-Year-Old Branches of Almond Trees

The implementation of new planting systems in almond (Prunus amygdalus (L.) Batsch, syn P. dulcis (Mill.)) orchards for more sustainable practices has made tree architecture increasingly relevant as an important selection trait plant breeding. Multiple features define the three-dimensional structure tree, with shoot production being most important. Shoots can develop after a period rest (proleptic shoots) or immediately (sylleptic shoots), at same time extension parent shoot. Scion/rootstock interactions may change proportion proleptic and sylleptic shoots thus alter architecture. To study this effect, we analyzed formation on three scion cultivars grafted onto five interspecific hybrid rootstocks. type sylleptic) internode number per were collected two-year-old branches three-year-old unpruned trees. We found that rootstock genotypes pattern production, especially formed. More information molecular response is needed to comprehend biological processes behind these differential phenotypes, which appear be modulated by both apical dominance control.