The Impact of Breeding on Fruit Production in Warm Climates of Brazil

Pommer, Celso Valdevino; Barbosa, Wilson

doi:10.17660/actahortic.2010.864.2

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…Two low-chill cultivars, 'Eva' and 'Caricia', are widely grown varieties in the mild winter areas of America, Africa and Asia (Pommer and Barbosa, 2009). …”

Section: Introductionmentioning

confidence: 99%

Crop loading studies on ‘Caricia’ and ‘Eva’ apples grown in a mild winter area

Castro

Álvarez

Gabriel

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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ABSTRACT:The crop load level of an apple (Malus × domestica Borkh.) tree impacts fruit yield and quality parameters, tree vigor and biennial bearing. The optimal crop load is that which allows for consistent annual cropping and fruit quality acceptable to the market. We evaluated the effect of crop load on yield and fruit quality of two low-chill apples cv. 'Caricia' and 'Eva', growing in a mild winter area. During 2010 and 2011 crop load was manually adjusted from 2 or 3 to 17 fruits cm −2 of trunk cross-sectional area (TCSA). Fruit yield was positively related to crop load in both cultivars but mean fruit weight diminished as the crop load increased. For both cultivars, the production of non-commercial and small-sized fruit increased, whereas production of middlesized fruit diminished as the fruit load increased. Shoot length was not affected by crop load in 'Eva' whereas it was reduced in 'Caricia'. Red skin color (RSC %) had a quadratic response to crop load in 'Caricia'. On the other hand, the RSC % of 'Eva' fruit was adjusted to a negative logarithmic model as an effect of crop load increment. No biennial bearing was observed in either cultivar. This research study suggests that the maximum limit of crop load for both cultivars is 7 fruits cm −2 of TCSA, and the lower limit of crop load was 3 fruits cm −2 of TCSA for 'Eva' and 5 fruits cm −2 of TCSA for 'Caricia'.

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“…Two low-chill cultivars, 'Eva' and 'Caricia', are widely grown varieties in the mild winter areas of America, Africa and Asia (Pommer and Barbosa, 2009). …”

Section: Introductionmentioning

confidence: 99%

Crop loading studies on ‘Caricia’ and ‘Eva’ apples grown in a mild winter area

Castro

Álvarez

Gabriel

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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“…It seems that these karyological differences among varieties/genotypes within the same species may be a consequence of discrete quantitative genomic changes due to small chromosomal rearrangements which could be raised by natural or mainly by artificial intercrossing among varieties allowing them to a better adaptation to the soil and the climate in the regions they have been grown. In fact, since Vitis is a millenary culture as reported through archeological findings (MITANI et al, 2009), it is predictable some degree of karyotype variation among the varieties, although these variation have not impeded many inter varietal crossings which have resulted in fertile hybrids used in breeding programs (POMMER, 2009).…”

Section: Resultsmentioning

confidence: 99%

Karyotype and NOR-banding of mitotic chromosomes of some Vitis L. species

Pierozzi¹

2011

Rev. Bras. Frutic.

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-Chromosome studies were performed in V. champinii, V. cinerea, V. girdiana, V. labrusca, V. rotundifolia, V. rupestris and V. vinifera with the purpose of species characterization using chromosome morphometric data and NOR banding. A median ideogram was obtained for each species. The karyotype formula obtained varied from 7m + 12sm to 9m + 11sm. The species showed moderate chromosome asymmetry values according to TF% form, Stebbins, Romero Zarco and Paszko indices. V. champinii and V. girdiana were apart from the other species by CVcl and CVci graphic representation and also formed a group apart in the dendrogram based on Euclidian distances. The chromosome pair number 3 harbors the secondary constriction and a satellite segment in all species analyzed with Giemsa staining and it may be the same observed after NOR banding technique. It seems that the process of speciation in the North American Euvitis species studied involved some discrete changes in chromosome morphometry which have been reflected in the asymmetry index. Index terms: karyotype, NOR-banding, mitotic chromosomes, Vitis, Vitaceae. ESTUDOS CROMOSSOMICOS DE ESPÉCIES DE Vitis RESUMO -Estudos cromossômicos foram efetuados em V. champinii, V. cinerea, V. girdiana, V. labrusca, V. rotundifolia, V. rupestris e V. vinifera com a finalidade de caracterização das espécies, usando dados de morfometria cromossômica e do bandamento NOR. Foi obtido um ideograma médio para cada espécie estudada. A fórmula cariotípica variou de 7m + 12sm a 9m + 11sm. As espécies mostraram assimetria cariotípica moderada pelos índices de TF% forma, Stebbins, Romero Zarco e Paszko. V. champinii e V. girdiana ficaram à parte das demais espécies pela representação gráfica de CVcl e CVci e também pelo dendrograma simplificado obtido pelo método de distância Euclidiana. O par cromossômico nº 3 apresentou constrição secundária e segmento satélite nas espécies analisadas com Giemsa, podendo ser o mesmo evidenciado pelo bandamento NOR. Parece que o processo de especiação das espécies de Euvitis americanas estudadas envolveu mudanças discretas na morfometria dos cromossomos a qual se refletiu no índice de assimetria cromossômica. Termos para indexação: cariótipo, bandamento NOR, cromossomos mitóticos, Vitis, Vitaceae.

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“…the culture of Passiflora edulis has great economic importance in Brazil as well as in other countries (POMMER and BARBOSA, 2009), consisting significant source of income for producers and promising market for the juice industry (Paiva et al, 2014). the importance of passion fruit crop in Brazil can be measured in the production of fruit, which reached 776.097 tons in 2012 ( ANUÁRIO BRASIleIRo de FRutICultuRA, 2013).…”

Section: A C Da Luz Et Almentioning

confidence: 99%

COMPARISON OF RNA EXTRACTION METHODS FOR Passiflora edulis SIMS LEAVES

2016

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ABSTRACT-Functional genomic analyses require intact RnA; however, Passiflora edulis leaves are rich in secondary metabolites that interfere with RnA extraction primarily by promoting oxidative processes and by precipitating with nucleic acids. this study aimed to analyse three RnA extraction methods, Concert ™ Plant RnA Reagent (Invitrogen, Carlsbad, CA, uSA), tRIzol ® Reagent (Invitrogen) and tRIzol ® Reagent (Invitrogen)/ice -commercial products specifically designed to extract RNA, and to determine which method is the most effective for extracting RnA from the leaves of passion fruit plants. In contrast to the RnA extracted using the other 2 methods, the RnA extracted using tRIzol ® Reagent (Invitrogen) did not have acceptable A260/A280 and A260/A230 ratios and did not have ideal concentrations. Agarose gel electrophoresis showed a strong dnA band for all of the Concert ™ method extractions but not for the tRIzol ® and tRIzol ® /ice methods. the tRIzol ® method resulted in smears during electrophoresis. due to its low levels of dnA contamination, ideal A260/A280 and A260/A230 ratios and superior sample integrity, RnA from the tRIzol ® /ice method was used for reverse transcription-polymerase chain reaction (Rt-PCR), and the resulting amplicons were highly similar. We conclude that tRIzol ® /ice is the preferred method for RnA extraction for P. edulis leaves.

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The Impact of Breeding on Fruit Production in Warm Climates of Brazil

Cited by 4 publications

References 8 publications

Crop loading studies on ‘Caricia’ and ‘Eva’ apples grown in a mild winter area

Crop loading studies on ‘Caricia’ and ‘Eva’ apples grown in a mild winter area

Karyotype and NOR-banding of mitotic chromosomes of some Vitis L. species

COMPARISON OF RNA EXTRACTION METHODS FOR Passiflora edulis SIMS LEAVES

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