Performance of new apple rootstocks for Gala variety in Southern Brazil

Abstract

'G.213' and 'CG.2022'.

Yield performance of apple rootstocks of the Geneva series on replanting soil

“…According to the technical team of Fischer Fraiburgo Agrícola Ltda., biennial bearing was observed on 'Fuji Suprema' in 2011/2012 and on 'Galaxy' in 2012/2013 seasons at the surroundings orchards of this study. Biennial bearing is a common fact in apple orchards and has also been reported in the literature for 'Gala' and 'Fuji' clones (Denardi et al, 2015a(Denardi et al, , 2016Fioravanço et al, 2016). In this study the average annual fruit yield was significantly lower during 2011/2012 and 2012/2013, compared with the 2010/2011 crop season, which is partially explained by the adoption in the experiment the same management applied in the surrounding orchards.…”

“…Likewise, White & Tustin (2000) reported that G.202 was one of the most promising in studies carried out in New Zealand, both on virgin and on replanting soils. In the present study, the G.213 rootstock, which stood out in other works regarding these same traits (Denardi et al, 2015a(Denardi et al, , 2016, showed a lower performance than expected. It should be pointed out, however, that there are no known reports in the literature of this rootstock on replanting soils; therefore, complementary studies are necessary for a better characterization and possible identification of the real causes for the worst performance of G.213 in the assessed growing conditions.…”

“…Both scion cultivars and rootstocks affected the performance of cumulative yield, TCSA, and yield efficiency, when evaluated individually, and of average fruit weight, when combined. Denardi et al (2016) reported significant effects of rootstocks on TCSA, cumulative fruit yield, yield efficiency, and average fruit weight for 'Gala' grafted on Geneva apple rootstocks, as well as of the interaction between rootstock and crop season on annual fruit yield.…”

“…Considering the scion vs. rootstock interaction for annual fruit yield, a superior performance was observed for 'Fuji Suprema' when grafted on most of the rootstocks, except on G.896, M.9, and Marubakaido/M.9, which showed similar results for both scion cultivars (Table 3). When evaluating other scion cultivars, Denardi et al (2016) found higher yield for 'Fuji' on three of the studied rootstocks (G.202, G.30, and G.210), and for 'Gala' only on the more vigorous MM.111.…”

“…Since most of the Geneva apple rootstocks are resistant to collar root rot and to woolly apple aphid (Robinson, 2011;Fazio et al, 2013) and some have adequate tolerance to ARD (Auvil et al, 2011;Fazio et al, 2012), researches have been conducted in Southern Brazil aiming to evaluate their performance in different growing conditions (Denardi et al, 2015a(Denardi et al, , 2016Pasa et al 2016Pasa et al , 2017. In the USA, Leinfelder & Merwin (2006) observed that the G.210 and G.30 rootstocks of the Geneva series induced greater vigor and yield to the scion than M.7.…”