Adventitious rooting of cultivars and clonal selections of Prunus spp. rootstock under intermittent mist system

• Published in: Revista Ceres Vol. 68; no. 3; pp. 230 - 238
• Main Authors: Mayer, Newton Alex, Lopes, Jéssica Luz, Ueno, Bernardo
• Format: Journal Article
• Language: English
• Published: Vicosa Universidade Federal de Viçosa-UFV, Revista Ceres 01-06-2021; Universidade Federal de Viçosa; Universidade Federal De Viçosa
• Subjects: AGRICULTURE, MULTIDISCIPLINARY; Canning; Canning industry; Cloning; Cultivars; Fruit trees; Fruits; Genetic variability; Germination; Humidity; Immunological tolerance; Mist; Orchards; Plant breeding; Plant propagation; Propagation; PTSL syndrome; Rooting; Rootstocks; Rosaceae; Seed germination; Seeds; softwood cutting; Trees; Brazil; Rio Grande do Sul Brazil; United States > US; Japan; Okinawa; softwood cutting; PTSL syndrome; cloning; Rosaceae
• ISSN: 0034-737X; 2177-3491; 2177-3491
• DOI: 10.1590/0034-737x202168030009

INTRODUCTION Among main agronomic problems that affect peach in Rio Grande do Sul State, Brazil, there are the absence of clonal rootstocks adapted to the edaphoclimatic conditions of the states peach area and which present tolerance to the Peach Tree Short Life (PTSL). With the technological advances obtained through of breeding programs for rootstocks, there was a significant reduction in tree losses caused by the PTSL syndrome in the United States, which culminated in the releasing of tolerant rootstock Guardian, Sharpe and MP-29 (Okie et al, 1994; Okie & Nyczepir, 2004; Beckman et al., 2008; Beckman et al., 2012). The rootstock used, in most of the peach and plum orchards in the State, are formed from seed germination and cause genetic variability, usually coming from canning industry (pits as residue of peach processing). Among the desirable characteristics of a good rootstock, in addition to scion graft compatibility and tolerance to biotic and/or abiotic soil problems, vegetative propagation is one of main selection criteria (Okie & Nyczepir, 2004; Beckman et al., 2008; Reighard & Loreti, 2008; Beckman et al., 2012; Warschefsky et al., 2016; Oliveira et al., 2018). [...]in order to advance in rootstock selection process, it is necessary to know the propagation potential of selected clones, comparing them with reference cultivars.