MULTIPLICATION OF Cattley guava BY DIFFERENT TECHNIQUES AND VARIABILITY AMONG GENOTYPES IN VIGOR AND ROOTING

Ano: 2018 | Volume: 24 | Número: 4

Autores: Marlon Altoé Biazatti, Claudia Sales Marinho, Mariana Barreto de Souza Arantes, Denilson de Oliveira Guilherme

Palavras-chave: Psidium cattleyanum, Mini-cuttings, Herbaceous cuttings, Semi-hardwood cuttings

Resumo Inglês:

Cattley guava (Psidium catteyanum Sabine) is a widespread native plant species of South America and constitutes important genetic resources for the improvement of guava trees. Fruits of these species are consumed by wild animals and extracted by local human populations. However, the vegetative propagation of adult plants, which is necessary for fi xing desired characteristics, has been ineffi cient. The objective of this work was to evaluate the rescue of adult plants of P. cattleyanum by herbaceous and semi-hardwood cuttings for the establishment of clonal mini-gardens and to evaluate the rooting potential of minicuttings of different genotypes. The experimental design was completely randomized in a factorial scheme with the treatments being different propagule or propagation techniques (herbaceous and semi-hardwood cuttings from mother plants cultivated in the fi eld and by mini-cuttings), with fi ve repetitions and six propagules per plot. The potential for multiplication by the mini-cutting technique and plant vigor were evaluated for 20 genotypes of cattley guava during three seasons of the year (autumn, winter and summer). The use of semi-hardwood cuttings is feasible for the rescue of adult plants and the establishment of clonal mini-gardens. The mini-cutting technique provided the highest rooting percentage, and was most effi cient in summer. The genotypes evaluated varied in rooting percentage and plant vigor