Seleção de genótipos de pessegueiro F1 com baixa necessidade de frio hibernal

Júnior, Américo Wagner; Bruckner, Claudio Horst; Salomão, Luiz Carlos Chamhum; Pimentel, Leonardo Duarte; Silva, José Osmar da Costa; Santos, Carlos Eduardo Magalhães dos

doi:10.1590/s0100-29452009000400028

Cited by 3 publications

(5 citation statements)

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“…The RRB was, on average, 59.53% in 2014 and 71.54% in 2015, demonstrating that there was a greater amount of chill available to the cultivars to overcome dormancy in the second year (Table 2). These values demonstrate a good budburst rate, as other authors regard 50% as a good rate of budburst for peach plants (Raseira & Nakasu, 1998;Wagner Júnior, Bruckner, Cantín, Sánchez, & Santos, 2011). Wagner Júnior et al (2009 studied the behaviour of peach tree cultivars and concluded that the greater chill accumulation also provides a gradual increase in budburst percentage.…”

Section: Resultssupporting

confidence: 69%

“…Increased emphasis should be placed on selecting cultivars that are well adapted to mild winter conditions in these locations. One factor that determines the adaptation to location is the need for winter cold, which is physiologically conditioned by the hormonal balance controlled by several genes and the environment (Wagner Júnior et al, 2009). This stability is defined as the ability to demonstrate highly predictable behaviour given certain environmental stimuli (Cruz & Carneiro, 2012).…”

Section: Introductionmentioning

confidence: 99%

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<b>Adaptability and stability of reproductive and vegetative phases of peach trees in subtropical climate

et al. 2017

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ABSTRACT. The peach tree (Prunus persica) is a fruit species native to temperate climates that requires a chill during its hibernal period to overcome dormancy. However, due to genetic breeding, varieties are currently grown in subtropical and tropical regions where there are low occurrences of chill during this phenological stage. This study evaluated the adaptability and stability of the reproductive and vegetative phases of peach tree cultivars in a subtropical climate. An experiment was designed in randomized blocks with split time plots, with 23 peach tree cultivars and four replications, with each replication consisting of one plant and four shoots. The years of evaluated (plots) and the cultivars (subplots) were considered to be treatments. The relative rates of budburst (RRB), flowering (RRF), shoot formation (SF) and fruit set (FS), average time of budburst (ATB) and flowering (ATF), duration of budburst (DB) and flowering (DF) and number of hours with temperatures below 7.20°C were evaluated during the experimental period. The cultivars 'Bonão', 'Ouromel-4', 'Libra' and 'Maciel' demonstrated greater adaptability during the vegetative phase, whereas'Ouromel-4' and 'Libra' demonstrated greater adaptability and stability during the reproductive phase of peach trees in a subtropical climate.Keywords: Prunus persica, fruit set, shoot formation, chill requirement.Adaptabilidade e estabilidade de fases reprodutivas e vegetativas de pessegueiros em clima subtropical RESUMO. O pessegueiro (Prunus persica) é uma frutífera de clima temperado e necessita de frio durante o repouso hibernal para superar a dormência, entretanto, atualmente é cultivado em regiões subtropicais e tropicais, onde há menor ocorrência de frio durante essa fase fenológica. Este trabalho teve como objetivo avaliar a adaptabilidade e a estabilidade das fases vegetativa e reprodutiva de cultivares de pessegueiro em clima subtropical avaliando os estádios de brotação e floração. O delineamento utilizado foi em blocos casualizados com quatro repetições e quatro ramos por repetição, em esquema de parcelas subdivididas no tempo, no qual as parcelas representam o tempo (2 ciclos produtivos) e as subparcelas as cultivares (23). Foram avaliados a duração da brotação (DB) e floração (DF), o tempo médio de brotação (ATB) e floração (ATF), a quantidade de gemas vegetativas brotadas (RRB) e floríferas brotadas (RRF), a formação de ramos (SF) e frutificação efetiva (FS) e o número de horas com temperatura abaixo de 7,2ºC e 12ºC, e acima de 20ºC durante o período experimental. As cultivares 'Bonão', 'Ouromel-4', 'Libra' e 'Maciel' apresentam maior adaptabilidade e estabilidade da fase vegetativa e 'Ouromel-4' e 'Libra' apresentam maior adaptabilidade e estabilidade da fase reprodutiva de pessegueiro sob clima subtropical. Palavras-chave:Prunus persica, frutificação efetiva, formação de ramos, requerimento em frio.

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Section: Resultssupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

<b>Adaptability and stability of reproductive and vegetative phases of peach trees in subtropical climate

et al. 2017

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“…The existence of genetic variability in chilling requirements is a determining factor for the success of breeding programs that aim to create cultivars adapted to subtropical winter conditions. In this sense, a better understanding of the chilling requirement of a certain genotype together with temperature information from the region where it will be planted are fundamental to the success of peach tree cultivation (Wagner Júnior et al, 2009).…”

Section: Advances In the Breeding Of Temperate Tree Fruitmentioning

confidence: 99%

Advances in the production of temperate fruits in the tropics

et al. 2018

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The present study aimed to review the advances in the production of temperate fruits to determine future research directions that improve production in the tropics. Temperate fruits are no longer only produced in regions characterized by a cold winter period. These fruits are also produced in the sub-tropical and tropical regions characterized by mild winter or even the absence of chilling conditions often required by the tree to break dormancy. Currently, temperate fruit production is possible in certain regions of South America, Africa and Asia that are near to the Equator. However, temperate tree fruit production in tropical regions requires modified techniques to overcome dormancy and allow adequate flowering, growth and productivity. The main approaches taken are the development of cultivars with low chilling requirement, chemical induction of budbreak, interruption of irrigation during the winter period, defoliation, orchard densification, and double pruning. Breeding has become a key tool in the advancement of temperate fruit growing in the tropics, especially with the development of low chilling requirement cultivars.

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“…Peach tree (Prunus persica L. Batsch) belongs to the Rosaceae family. It originated in China and is classified as a temperate fruit that requires chilling temperature during winter to overcome dormancy (FERRAZ et al, 2015), to stimulate sprouting and flowering (WAGNER JÚNIOR et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Studies in crop genetic improvement programmes are leading to grow peaches in subtropical and tropical climate all over the world (SCARIOTTO et al, 2013). Due to genotypes development and selection that require low chilling temperatures to overcome dormancy, that is, enabling to grow in mild winter climate areas (WAGNER JÚNIOR et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Peaches phenology and production submitted to foliar nitrogen fertilizer and calcium nitrate

Ferreira¹,

Leonel²,

Souza³

et al. 2019

Biosci. J.

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Choosing cultivars that require less chilling temperatures to overcome dormancy is crucial, for example, peaches that grow in subtropical areas, which is not an appropriate climate for them. Thus, alternative techniques are necessary to induce sprouting. Yet there are not many available products in market, restricting options for fruit growers to a reduced number of chemical molecules, which are often harm the health to applicators. Therefore, this study aimed to assess phenological cycles and productive performance of three peach cultivars, submitted to foliar nitrogen fertilizer and calcium nitrate to induce sprouting. This study took place at Experimental Orchard of School of Agriculture (FCA, UNESP), Botucatu, state of São Paulo. Three peach cultivars were evaluated: 'Douradão', 'BRS Kampai' and 'BRS Rubimel' by applying four doses of foliar nitrogen fertilizer (FNF) at 0, 1.25, 2.50 and 3.75%; associated with 4% calcium nitrate. A 3x4 factorial arrangement (3 cultivars X 4 FNF doses) in a randomized block design was used, with 4 replicates and 2 plants per plot, totalizing 96 plants. Results indicated that FNF positively affected cultivars development, providing wider sprouting, flowering and fruit set; consequently, greater production. Then FNF became a good alternative to induce sprouting in peaches at mild winter temperatures. Moreover, 'BRS Rubimel' presented high sowing percentage associated with low flowering and fruit set percentages, that is, low production mainly caused by its lack of adaptability to studied region.

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Seleção de genótipos de pessegueiro F1 com baixa necessidade de frio hibernal

Cited by 3 publications

References 5 publications

<b>Adaptability and stability of reproductive and vegetative phases of peach trees in subtropical climate

<b>Adaptability and stability of reproductive and vegetative phases of peach trees in subtropical climate

Advances in the production of temperate fruits in the tropics

Peaches phenology and production submitted to foliar nitrogen fertilizer and calcium nitrate

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