Carica papaya

Efficiency of circulant diallels via mixed models in the selection of papaya genotypes resistant to foliar fungal diseases

M. Vivas, Silveira, S. F., Viana, A. P., Amaral, Jr., A. T., Cardoso, D. L., and Pereira, M. G., Efficiency of circulant diallels via mixed models in the selection of papaya genotypes resistant to foliar fungal diseases, vol. 13, pp. 4797-4804, 2014.

Diallel crossing methods provide information regarding the performance of genitors between themselves and their hybrid combinations. However, with a large number of parents, the number of hybrid combinations that can be obtained and evaluated become limited. One option regarding the number of parents involved is the adoption of circulant diallels. However, information is lacking regarding diallel analysis using mixed models.

Isolation and characterization of the papaya MADS-box E-class genes, CpMADS1 and CpMADS3, and a TM6 lineage gene CpMADS2

M. - J. Lee, Yang, W. - J., Chiu, C. - T., Chen, J. - J., Chen, F. - C., and Chang, L. - S., Isolation and characterization of the papaya MADS-box E-class genes, CpMADS1 and CpMADS3, and a TM6 lineage gene CpMADS2, vol. 13, pp. 5299-5312, 2014.

Papaya (Carica papaya L.) plants are polygamous, with female, male, and hermaphroditic flowers. To understand the roles of MADS-box genes in flower development and sex determination, we cloned cDNAs of E-class genes CpMADS1 and CpMADS3 and a TM6 lineage of the B-class gene CpMADS2 from young flower buds of papaya. Reverse transcription-polymerase chain reaction (RT-PCR) and real-time PCR analyses revealed that CpMADS1 and CpMADS3 were preferentially expressed in the carpel and also in petals and stamens.

Multivariate analysis to determine the genetic distance among backcross papaya (Carica papaya) progenies

H. C. C. Ramos, Pereira, M. G., Gonçalves, L. S. A., Berilli, A. P. C. G., Pinto, F. O., and Ribeiro, E. H., Multivariate analysis to determine the genetic distance among backcross papaya (Carica papaya) progenies, vol. 11, pp. 1280-1295, 2012.

Morpho-agronomic and molecular (RAPD and ISSR markers) data were used to evaluate genetic distances between papaya backcross progenies in order to help identify agronomically superior genotypes. Thirty-two papaya progenies were evaluated based on 15 morpho-agronomic characteristics, 20 ISSR and 19 RAPD primers. Manhattan, Jaccard and Gower distances were used to estimate differences based on continuous and binary data and combined analyses, respectively. Except for production, there were significant differences in the continuous variables among the genotypes.

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