Phenotypic characterization of recurrent selection S1 Papaya (Carica papaya L.) families by multivariate approach.

Autor: Santa-Catarina, Renato, Vettorazzi, Julio Cesar Fiorio, Cortes, Diego Fernando Marmolejo, Santana, Josefa Grasiela Silva, Poltronieri, Tathianne Pastana de Sousa, Miranda, Daniel Pereira, Pirovani, Adriana Azevedo Vimercati, Moreira, Nádia Fernandes, Vivas, Marcelo, Pereira, Messias Gonzaga
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Zdroj: Euphytica; Jul2020, Vol. 216 Issue 7, p1-13, 13p
Abstrakt: In the current study, the morphological traits in 222 individuals of the UCP-C0 base population were evaluated to distinguish the phenotypic variability and thus to be used in the papaya recurrent selection program. The studied traits showed considerable differences among the individuals. The fruit weight ranged from 279.7 to 1808.0 g with average of 859.7 g, the number of commercial fruits ranged from 5 to 125 fruits, the fruit and pulp firmness ranged from 76.69 and 59.44 N to 166.70 and 132.93 N respectively, while the soluble solids content was between 5.10 and 14.93° Brix. The principal component analysis showed that five components explained 76% of the total variance. Morphological cluster analysis based on the UPGMA method showed 13 distinct clusters among all the studied accessions, and the fruit weight was that most contributed for the genetic diversity. The results show that the UCP-C0 has wide genetic variability and therefore the choice of genotypes used as parents in the generation of the UCP-C0 was very effective to generate a broad base population for most of the agronomic and fruit quality traits. The strategy to use the highly heterogeneous and heterozygous dioic progenies, and the pollen mix of elite genitors, contributed to the observed results, mainly by the genetic variability present in them. A broad base population is fundamental to establish the recurrent selection program, a classical methodology that may provide superior genotypes at short and long terms. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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