TY  - CONF
AU  - Meland, Mekjell
AU  - Froynes, Oddmund
AU  - Fotirić-Akšić, Milica
AU  - Maas, F.M.
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5430
AB  - The triploid pear cultivar 'Ingeborg' is currently the main commercial pear cultivar grown in Norway. However, fruit set and subsequent yields of this cultivar have proven to be variable and overall rather low. In order to promote the fruit set, different bioregulators were applied during and after bloom and compared with an untreated control. Investigations were done during the period 2017-2018, at NIBIO Ullensvang, western Norway. Different dosages of both gibberellins (GA3, trade name GIBB 3, 10% active ingredient (a.i.) and GA4/7, trade name Novagib®, 1% a.i.) were applied at full bloom and at petal fall. Additional applications of the growth retardant prohexadione-Ca (trade name Regalis®, 10% a.i.) were applied twice, when bourse shoots had 3-5 leaves and after one month later. Ethephon (Cerone (480 g a.i. L-1)) was applied three times starting about 7 days after petal fall with ca. 7- to 10-day intervals. All gibberellin applications significantly increased fruit set compared to the untreated control. One single application with GA3 (3 g ha-1) almost tripled the fruit number per 100 flower clusters when compared with the control (136 and 46, respectively). The yield response was similar (16.8 to 9.6 kg tree-1, respectively). Similar results occurred with one application of GA4/7 (12 g ha-1) with the same crop load level, and the fruit weights were similar to the control (130 g). Prohexadione-Ca treatments significantly reduced shoot growth of the pear trees. Two treatments with 125 g ha-1 or one treatment of 250 g ha-1 reduced the growth by ~35% but had no significant effect on fruit set and yield. The multiple ethephon applications (275 mL ha-1 in total) had no effect on both set and shoot growth, and return bloom compared to the untreated or gibberellin treated trees.
PB  - International Society for Horticultural Science
C3  - Acta Horticulturae
T1  - Promoting fruit set of 'Ingeborg' pears in a northern climate
EP  - 398
SP  - 393
VL  - 1281
DO  - 10.17660/ActaHortic.2020.1281.52
ER  - 

@conference{
author = "Meland, Mekjell and Froynes, Oddmund and Fotirić-Akšić, Milica and Maas, F.M.",
year = "2020",
abstract = "The triploid pear cultivar 'Ingeborg' is currently the main commercial pear cultivar grown in Norway. However, fruit set and subsequent yields of this cultivar have proven to be variable and overall rather low. In order to promote the fruit set, different bioregulators were applied during and after bloom and compared with an untreated control. Investigations were done during the period 2017-2018, at NIBIO Ullensvang, western Norway. Different dosages of both gibberellins (GA3, trade name GIBB 3, 10% active ingredient (a.i.) and GA4/7, trade name Novagib®, 1% a.i.) were applied at full bloom and at petal fall. Additional applications of the growth retardant prohexadione-Ca (trade name Regalis®, 10% a.i.) were applied twice, when bourse shoots had 3-5 leaves and after one month later. Ethephon (Cerone (480 g a.i. L-1)) was applied three times starting about 7 days after petal fall with ca. 7- to 10-day intervals. All gibberellin applications significantly increased fruit set compared to the untreated control. One single application with GA3 (3 g ha-1) almost tripled the fruit number per 100 flower clusters when compared with the control (136 and 46, respectively). The yield response was similar (16.8 to 9.6 kg tree-1, respectively). Similar results occurred with one application of GA4/7 (12 g ha-1) with the same crop load level, and the fruit weights were similar to the control (130 g). Prohexadione-Ca treatments significantly reduced shoot growth of the pear trees. Two treatments with 125 g ha-1 or one treatment of 250 g ha-1 reduced the growth by ~35% but had no significant effect on fruit set and yield. The multiple ethephon applications (275 mL ha-1 in total) had no effect on both set and shoot growth, and return bloom compared to the untreated or gibberellin treated trees.",
publisher = "International Society for Horticultural Science",
journal = "Acta Horticulturae",
title = "Promoting fruit set of 'Ingeborg' pears in a northern climate",
pages = "398-393",
volume = "1281",
doi = "10.17660/ActaHortic.2020.1281.52"
}

Meland, M., Froynes, O., Fotirić-Akšić, M.,& Maas, F.M.. (2020). Promoting fruit set of 'Ingeborg' pears in a northern climate. in Acta Horticulturae
International Society for Horticultural Science., 1281, 393-398.
https://doi.org/10.17660/ActaHortic.2020.1281.52

Meland M, Froynes O, Fotirić-Akšić M, Maas F. Promoting fruit set of 'Ingeborg' pears in a northern climate. in Acta Horticulturae. 2020;1281:393-398.
doi:10.17660/ActaHortic.2020.1281.52 .

Meland, Mekjell, Froynes, Oddmund, Fotirić-Akšić, Milica, Maas, F.M., "Promoting fruit set of 'Ingeborg' pears in a northern climate" in Acta Horticulturae, 1281 (2020):393-398,
https://doi.org/10.17660/ActaHortic.2020.1281.52 . .

TY  - JOUR
AU  - Meland, Mekjell
AU  - Froynes, Oddmund
AU  - Fotirić-Akšić, Milica
AU  - Pojskić, Naris
AU  - Kalamujić-Stroil, Belma
AU  - Lasić, Lejla
AU  - Gasi, Fuad
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5335
AB  - European plum cultivars (Prunus domestica L.) are hexaploid and partially self-fertile or self-sterile requiring compatible pollinizers with overlapping bloom times. Therefore, inter-planting of different pollinizer cultivars is recommended. In order to identify successful pollinizers of the plum cultivars 'Edda', 'Opal' (self-fertile), 'Jubileum', 'Reeves', 'Mallard', 'Avalon', 'Cacanska Lepotica' (self-fertile), and 'Valor', 60 fruits per cultivar were collected from nine orchards in 2017 and 2018, all of which were located in Ullensvang, western Norway. DNA extraction was subsequently conducted from the obtained embryos, followed by genetic characterization using seven microsatellite markers. Tissue samples from all possible pollinizers were collected during the summer of 2017 and the same DNA approach was conducted. Results showed that 'Opal' was the most successful pollinizer among the investigated plum cultivars. The main exception was 'Cacanska Lepotica', which consistently displayed very high level of self-pollination. The most successful foreign pollinizer of 'Opal' was 'Mallard'. However, in more than two thirds of embryos extracted from 'Opal' fruits self-fertilization was determined. 'Reeves' was identified as the most successful pollinizer among embryos collected from 'Valor'. Among the five cultivars ('Edda', 'Jubileum', 'Reeves', 'Mallard', and 'Avalon') that did not display self-pollination, the pollinizer success rate of 'Opal', ranged from 36.5% ('Mallard') to 93.5% ('Edda') in 2017, while in 2018 this rate ranged from 43.5% ('Jubileum' and 'Reeves') up to 96.5% ('Edda'). Overall, genotyping embryos using SSRs (simple sequence repeats) proved an effective method in determining the success rate of individual pollinizers among European plum cultivars.
PB  - MDPI, BASEL
T2  - Agronomy-Basel
T1  - Identifying Pollen Donors and Success Rate of Individual Pollinizers in European Plum (Prunus domestica L.) Using Microsatellite Markers
IS  - 2
VL  - 10
DO  - 10.3390/agronomy10020264
ER  - 

@article{
author = "Meland, Mekjell and Froynes, Oddmund and Fotirić-Akšić, Milica and Pojskić, Naris and Kalamujić-Stroil, Belma and Lasić, Lejla and Gasi, Fuad",
year = "2020",
abstract = "European plum cultivars (Prunus domestica L.) are hexaploid and partially self-fertile or self-sterile requiring compatible pollinizers with overlapping bloom times. Therefore, inter-planting of different pollinizer cultivars is recommended. In order to identify successful pollinizers of the plum cultivars 'Edda', 'Opal' (self-fertile), 'Jubileum', 'Reeves', 'Mallard', 'Avalon', 'Cacanska Lepotica' (self-fertile), and 'Valor', 60 fruits per cultivar were collected from nine orchards in 2017 and 2018, all of which were located in Ullensvang, western Norway. DNA extraction was subsequently conducted from the obtained embryos, followed by genetic characterization using seven microsatellite markers. Tissue samples from all possible pollinizers were collected during the summer of 2017 and the same DNA approach was conducted. Results showed that 'Opal' was the most successful pollinizer among the investigated plum cultivars. The main exception was 'Cacanska Lepotica', which consistently displayed very high level of self-pollination. The most successful foreign pollinizer of 'Opal' was 'Mallard'. However, in more than two thirds of embryos extracted from 'Opal' fruits self-fertilization was determined. 'Reeves' was identified as the most successful pollinizer among embryos collected from 'Valor'. Among the five cultivars ('Edda', 'Jubileum', 'Reeves', 'Mallard', and 'Avalon') that did not display self-pollination, the pollinizer success rate of 'Opal', ranged from 36.5% ('Mallard') to 93.5% ('Edda') in 2017, while in 2018 this rate ranged from 43.5% ('Jubileum' and 'Reeves') up to 96.5% ('Edda'). Overall, genotyping embryos using SSRs (simple sequence repeats) proved an effective method in determining the success rate of individual pollinizers among European plum cultivars.",
publisher = "MDPI, BASEL",
journal = "Agronomy-Basel",
title = "Identifying Pollen Donors and Success Rate of Individual Pollinizers in European Plum (Prunus domestica L.) Using Microsatellite Markers",
number = "2",
volume = "10",
doi = "10.3390/agronomy10020264"
}

Meland, M., Froynes, O., Fotirić-Akšić, M., Pojskić, N., Kalamujić-Stroil, B., Lasić, L.,& Gasi, F.. (2020). Identifying Pollen Donors and Success Rate of Individual Pollinizers in European Plum (Prunus domestica L.) Using Microsatellite Markers. in Agronomy-Basel
MDPI, BASEL., 10(2).
https://doi.org/10.3390/agronomy10020264

Meland M, Froynes O, Fotirić-Akšić M, Pojskić N, Kalamujić-Stroil B, Lasić L, Gasi F. Identifying Pollen Donors and Success Rate of Individual Pollinizers in European Plum (Prunus domestica L.) Using Microsatellite Markers. in Agronomy-Basel. 2020;10(2).
doi:10.3390/agronomy10020264 .

Meland, Mekjell, Froynes, Oddmund, Fotirić-Akšić, Milica, Pojskić, Naris, Kalamujić-Stroil, Belma, Lasić, Lejla, Gasi, Fuad, "Identifying Pollen Donors and Success Rate of Individual Pollinizers in European Plum (Prunus domestica L.) Using Microsatellite Markers" in Agronomy-Basel, 10, no. 2 (2020),
https://doi.org/10.3390/agronomy10020264 . .

TY  - JOUR
AU  - Gasi, Fuad
AU  - Froynes, Oddmund
AU  - Kalamujić-Stroil, Belma
AU  - Lasić, Lejla
AU  - Pojskić, Naris
AU  - Fotirić-Akšić, Milica
AU  - Meland, Mekjell
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5291
AB  - The diploid Celina/QTee(R)('Coloree de Juillet' x 'Williams'), one of the most promising pear cultivars developed by the Norwegian breeding program Graminor, was launched in 2010. In Norway, the flowering is medium to late, while the fruits ripen in the beginning of September. The fruits are attractive with an intense red blush (50%) on a green BACKGROUND: . Although, 'Celina' is cultivated in the most climatically suitable regions for fruit cultivation, present in Norway, unfavorable environmental conditions for pear pollination can have a very negative effect on fruit set and consequent yield. The aim of this study was to determine theS-alleles of 'Celina', as well as its frequently used pollinizers, and, through paternity testing of 'Celina' seeds, give a recommendation regarding the most important pollinizers of this pear cultivar. In order to accomplish this, 'Celina' and its potential pollinizers were allS-genotyped. After harvest, seeds collected from 'Celina' fruit in 2017 and 2018 were genotyped using eleven microsatellite markers. Genomic DNA was also extracted from leaf material collected from 'Celina', as well as from five pear cultivars used as pollinizers in the three examined orchards, and analyzed using the same marker set. Subsequently a simple sequence repeat (SSR) database was constructed and used for gene assignment analyses with the aim of quantifying pollen donor contribution from individual pollinizers. The obtained results indicate that 'Anna', the only examined pollinizer that was fully cross-compatible with 'Celina', together with 'Fritjof', the genotype which had the highest flowering overlap with 'Celina', proved to be the most successful pollinizers across all seasons and orchards. Although both cultivars were ubiquitous in the examined orchards, either as planted trees or as branches introduced during the flowering period, they were the most abundant pollinizers in only one orchard each. It is therefore possible to conclude that pollinizer abundance has a secondary significance in pollinizer success within investigated 'Celina' orchards.
PB  - MDPI, BASEL
T2  - Agronomy-Basel
T1  - S-Genotyping and Seed Paternity Testing of the Pear Cultivar 'Celina'
IS  - 9
VL  - 10
DO  - 10.3390/agronomy10091372
ER  - 

@article{
author = "Gasi, Fuad and Froynes, Oddmund and Kalamujić-Stroil, Belma and Lasić, Lejla and Pojskić, Naris and Fotirić-Akšić, Milica and Meland, Mekjell",
year = "2020",
abstract = "The diploid Celina/QTee(R)('Coloree de Juillet' x 'Williams'), one of the most promising pear cultivars developed by the Norwegian breeding program Graminor, was launched in 2010. In Norway, the flowering is medium to late, while the fruits ripen in the beginning of September. The fruits are attractive with an intense red blush (50%) on a green BACKGROUND: . Although, 'Celina' is cultivated in the most climatically suitable regions for fruit cultivation, present in Norway, unfavorable environmental conditions for pear pollination can have a very negative effect on fruit set and consequent yield. The aim of this study was to determine theS-alleles of 'Celina', as well as its frequently used pollinizers, and, through paternity testing of 'Celina' seeds, give a recommendation regarding the most important pollinizers of this pear cultivar. In order to accomplish this, 'Celina' and its potential pollinizers were allS-genotyped. After harvest, seeds collected from 'Celina' fruit in 2017 and 2018 were genotyped using eleven microsatellite markers. Genomic DNA was also extracted from leaf material collected from 'Celina', as well as from five pear cultivars used as pollinizers in the three examined orchards, and analyzed using the same marker set. Subsequently a simple sequence repeat (SSR) database was constructed and used for gene assignment analyses with the aim of quantifying pollen donor contribution from individual pollinizers. The obtained results indicate that 'Anna', the only examined pollinizer that was fully cross-compatible with 'Celina', together with 'Fritjof', the genotype which had the highest flowering overlap with 'Celina', proved to be the most successful pollinizers across all seasons and orchards. Although both cultivars were ubiquitous in the examined orchards, either as planted trees or as branches introduced during the flowering period, they were the most abundant pollinizers in only one orchard each. It is therefore possible to conclude that pollinizer abundance has a secondary significance in pollinizer success within investigated 'Celina' orchards.",
publisher = "MDPI, BASEL",
journal = "Agronomy-Basel",
title = "S-Genotyping and Seed Paternity Testing of the Pear Cultivar 'Celina'",
number = "9",
volume = "10",
doi = "10.3390/agronomy10091372"
}

Gasi, F., Froynes, O., Kalamujić-Stroil, B., Lasić, L., Pojskić, N., Fotirić-Akšić, M.,& Meland, M.. (2020). S-Genotyping and Seed Paternity Testing of the Pear Cultivar 'Celina'. in Agronomy-Basel
MDPI, BASEL., 10(9).
https://doi.org/10.3390/agronomy10091372

Gasi F, Froynes O, Kalamujić-Stroil B, Lasić L, Pojskić N, Fotirić-Akšić M, Meland M. S-Genotyping and Seed Paternity Testing of the Pear Cultivar 'Celina'. in Agronomy-Basel. 2020;10(9).
doi:10.3390/agronomy10091372 .

Gasi, Fuad, Froynes, Oddmund, Kalamujić-Stroil, Belma, Lasić, Lejla, Pojskić, Naris, Fotirić-Akšić, Milica, Meland, Mekjell, "S-Genotyping and Seed Paternity Testing of the Pear Cultivar 'Celina'" in Agronomy-Basel, 10, no. 9 (2020),
https://doi.org/10.3390/agronomy10091372 . .