Breeding Peaches for Brown Rot Resistance in Embrapa

Dini, M.; Raseira, M. do C. B.; Scariotto, Sílvia; Ueno, B.

doi:10.3390/agronomy12102306

Cited by 2 publications

(2 citation statements)

References 42 publications

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“…Thus, it is targeted by institutional research groups searching for molecular markers of resistance; the FruitBreedomics (Europe) and the RosBREED (North American) projects were the most important collective initiatives thus far [11,12]. The main challenge in genetic improvement is that BR resistance is quantitatively inherited [13][14][15], so its heritability is medium to low with a high environmental influence, resulting in small and slow progress [10,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Fruit Wounding on Subsequent Monilinia laxa Infection of Nectarines

et al. 2023

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Despite the fact that brown rot is the most economically important disease in stone fruits, the relationship between mechanical stress and infection has never been explored. Thus, to explore this connection, we carried out four experiments linking nectarine wounding and M. laxa infection. First, we evaluated a possible systemic reaction of the fruit to wounding that could impact the M. laxa infection. Afterward, we study the impact of the fruit in the environment on M. laxa colonies grown in vitro. Subsequently, we tested the disease susceptibility of fruits inoculated with M. laxa placed in the same environment as wounded fruits. Finally, in the fourth experiment, the effect of wounding on the subsequent fruit infections was evaluated at three fruit stages. As a result, we observed that there was no evidence of a fruit systemic reaction to wounding and M. laxa infection. In the study related to the impact of the fruit in the environment of M. laxa, the findings suggest that M. laxa “perceived” the fruit’s presence, resulting in accelerated in vitro growth. Moreover, the presence of wounded fruits in the box increased the susceptibility to brown rot. Inoculated fruits showed a delayed and reduced infection 7 h after being wounded, during the second stage of fruit development (15–19 weeks after full bloom). Moreover, a red reaction associated with inoculation was detected immediately after the fruits were wounded. Nine phenolic compounds exclusively related to the red areas were extracted, while six other compounds were present in higher proportions. These compounds may be actively involved in plant–pathogen interactions and the activation of metabolic pathways involved in nectarine susceptibility/resistance to M. laxa.

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Section: Introductionmentioning

confidence: 99%

Influence of Fruit Wounding on Subsequent Monilinia laxa Infection of Nectarines

et al. 2023

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“…It is well known that the Bolinha peach variety, from Brazilian origin, presents a good resistance mechanism with less susceptibility to brown rot than other varieties [35]. It has been observed that the resistance to disease of 'Bolinha' [22,33] and other resistant sources [36,37] is transmitted to their descendants. Following this approach, in our laboratory, we have selected peach genotypes from a population derived from the cross of two commercial varieties, 'Babygold 9 × 'Crown Princess', based on their tolerance to M. laxa and their quality.…”

Section: Introductionmentioning

confidence: 99%

Identification of ‘Calanda’-Type Peach Genotypes Tolerant to Monilinia laxa (Aderh. & Ruhland) Honey

et al. 2022

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One of the diseases that has the greatest negative effect on peach production is brown rot, produced by the fungus, Monilinia spp. The way to diminish this disease is the selection of genotypes with a high tolerance to Monilinia spp. while maintaining fruit quality. In this study, the tolerance to Monilinia laxa and agronomic and biochemical characteristics of forty-two hybrids derived from the ‘Andross’ × ‘Calante’ cross were studied under controlled conditions during two consecutive years, and compared with their parents. The assessment of tolerance to brown rot was estimated on inoculated fruit with M. laxa, recording the incidence of brown rot and colonization, lesion diameter and extent of colonization, to establish the severity of incidence and colonization. At harvest, physicochemical traits and antioxidant compounds (vitamin C, total phenolics, flavonoids and relative antioxidant capacity) were determined. We have found inverse relationships between fruit firmness, pH, titratable acidity and antioxidant contents with the disease symptoms in fruit. Our results confirm that the accumulation of antioxidants tends to reduce the lesion and colonization in inoculated fruit. Principal component analysis allowed the selection of two genotypes, AC-24 and AC-93, of ‘Calanda’-type peaches with a known standard quality, high antioxidant content and minimal susceptibility to brown rot.

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Breeding Peaches for Brown Rot Resistance in Embrapa

Cited by 2 publications

References 42 publications

Influence of Fruit Wounding on Subsequent Monilinia laxa Infection of Nectarines

Influence of Fruit Wounding on Subsequent Monilinia laxa Infection of Nectarines

Identification of ‘Calanda’-Type Peach Genotypes Tolerant to Monilinia laxa (Aderh. & Ruhland) Honey

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