Selection and estimation of the genetic gain in segregating generations of papaya (Carica papaya L.)
| Autor: | Francisco Filho da Silva, Messias Gonzaga Pereira, Helaine Christine Cancela Ramos, Pedro Corrêa Damasceno Junior, Telma Nair Santana Pereira, Ana Paula Cândido Gabriel, Alexandre Pio Viana, Geraldo Antônio Ferreguetti |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Crop Breeding and Applied Biotechnology, Vol 8, Iss 1, Pp 1-8 (2008) |
| Druh dokumentu: | article |
| ISSN: | 1518-7853 1984-7033 |
| Popis: | In Brazil, papaya is sustained by a narrow genetic basis, with few genetically distinct cultivars for planting.Therefore, this study aimed to select and estimate the direct and combined genetic gains for commercial fruit yield (Yld Plt-1)in segregating generations of papaya. Six traits were simultaneously targeted in combined selection and were attributedweights associated to agronomic values. Direct selection however was based on Yld Plt-1 only. Results indicated geneticvariability in the segregating generations for the evaluated traits and although combined selection achieved a lower geneticgain in Yld Plt-1, it offers greater chances of success in the following generations since favorable and unfavorable agronomictraits of papaya are considered. These results motivated the recommendation to advance generations with 30 plants, selectedfrom a total of 345 plants, considering all segregating treatments. |
| Databáze: | Directory of Open Access Journals |
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