Reproductive biology traits affecting productivity of sour cherry

Abstract

-The objective of this work was to evaluate variability in reproductive biology traits and the correlation between them in genotypes of 'Oblačinska' sour cherry (Prunus cerasus). High genetic diversity was found in the 41 evaluated genotypes, and significant differences were observed among them for all studied traits: flowering time, pollen germination, number of fruiting branches, production of flower and fruit, number of flowers per bud, fruit set, and limb yield efficiency. The number of fruiting branches significantly influenced the number of flower and fruit, fruit set, and yield efficiency. In addition to number of fruiting branches, yield efficiency was positively correlated with fruit set and production of flower and fruit. Results from principal component analysis suggested a reduction of the reproductive biology factors affecting yield to four main characters: number and structure of fruiting branches, flowering time, and pollen germination. Knowledge of the reproductive biology of the 'Oblačinska' genotypes can be used to select the appropriate ones to be grown or used as parents in breeding programs. In this sense, genotypes II/2, III/9, III/13, and III/14 have very good flower production and satisfactory pollen germination.Index terms: Prunus cerasus, breeding, genetic divergence, pollen germination, principal component analysis, yield efficiency. Características da biologia reprodutiva que afetam a produtividade de cereja ácidaResumo -O objetivo deste trabalho foi avaliar a variabilidade de características da biologia reprodutiva e a correlação entre elas, em genótipos da cereja ácida (Prunus cerasus) 'Oblačinska'. Verificou-se alta diversidade genética nos 41 genótipos avaliados, e foram observadas diferenças significativas entre eles, para todas as características estudadas: época de florescimento, germinação de pólen, número de ramos frutíferos, produção de flores e frutos, número de flores por botão, formação de frutos e eficiência de produção dos ramos. O número de ramos frutíferos influenciou significativamente o número de flores e frutos, a formação de frutos e a eficiência produtiva. Além do número de ramos frutíferos, a eficiência produtiva correlacionou-se positivamente com o pegamento de frutos e a produção de flores e frutos. Os resultados da análise de componentes principais sugerem a redução dos fatores de biologia reprodutiva que afetam a produtividade a quatro características principais: número e estrutura dos ramos frutíferos, tempo de florescimento e germinação de pólen. O conhecimento da biologia floral dos genótipos 'Oblačinska' pode ser útil para a escolha dos mais apropriados para plantio ou uso como parentais em programas de melhoramento. Neste sentido, os genótipos II/2, III/9, III/13 e III/14 apresentam produção de flores muito boa e germinação de pólen satisfatória.Termos para indexação: Prunus cerasus, melhoramento, divergência genética, germinação de pólen, análise de componentes principais, eficiência produtiva.

Effects of Gibberellic acid, micronutrient fertilizer and Calcium nitrate foliar fertilizer on growth and yield of tomato Solanum lycopersicum L. cultivated in Vietnam

“…Number of flowers and effective flower rate. The production of flowers is the main element contributing to the success of fruit setting [18]. The number of flowers is considered to be the first yield characters of plants [19].…”

Success Rate of Individual Pollinizers for the Pear Cultivars “Ingeborg” and “Celina” in a Nordic Climate

“…In seeded plants, like pear, successful fruit set and fruit development depend on both pollination and subsequent fertilization. Since the pollen grain is a key factor in those processes, it must have good functional ability, which requires adequate vitality and satisfactory germination [62]. A correlation between pollen germination in vitro and final fruit set (Table 1) was previously determined in apple by Jahed and Hirst [63] and in sweet cherry by Radičević et al [64].…”

The Effective Pollination Period of European Plum (Prunus domestica L.) Cultivars in Western Norway

“…Reproductive biology plays an extremely important role in achieving high yields. However, evaluation of the reproductive potential of a certain genotype is hard to perceive since flower morphology and all processes within the flower is either genetic or environmental dependent (or under the influence of their interaction) [8]. Fruit yield is strongly determined by the fruit set, which is the result of a series of physiological events, such as overlapping of flowering period, pollen transfer, pollen germination, pollen-pistil interaction, pollen tube growth, synchrony between pollen tube arrival to the ovule and embryo sac maturation, ovule longevity and fertilization of an ovule, and successful early embryo development [9].…”