Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
In order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. Genetic gains were estimated from the selection in...
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| Format: | Article |
| Language: | English |
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Universidade Federal De Viçosa
2012-12-01
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| Series: | Revista Ceres |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2012000600007&lng=en&tlng=en |
| _version_ | 1818955612227108864 |
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| author | Marcelo Vivas Silvaldo Felipe da Silveira Messias Gonzaga Pereira |
| author_facet | Marcelo Vivas Silvaldo Felipe da Silveira Messias Gonzaga Pereira |
| author_sort | Marcelo Vivas |
| collection | DOAJ |
| description | In order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. Genetic gains were estimated from the selection indices of Smith & Hazel, Pesek & Baker, Williams, Mulamba & Mock, with selection intensity of 22.39%, corresponding to 15 hybrids. The index of Mulamba & Mock showed gains more suitable for the five traits assessed when it was used the criterion of economic weight tentatively assigned. Together, severity of black spot on leaves and on fruits, characteristics considered most relevant to the selection of resistant materials, expressed percentage gain of -44.15%. In addition, there were gains for other characteristics, with negative predicted selective percentage gain. The results showed that the index of Mulamba & Mock is the most efficient procedure for simultaneous selection of papaya hybrid resistant to black spot, powdery mildew and phoma spot. |
| first_indexed | 2024-12-20T10:40:50Z |
| format | Article |
| id | doaj.art-04f2da85a611403d81adc2c69ee53b13 |
| institution | Directory Open Access Journal |
| issn | 2177-3491 |
| language | English |
| last_indexed | 2024-12-20T10:40:50Z |
| publishDate | 2012-12-01 |
| publisher | Universidade Federal De Viçosa |
| record_format | Article |
| series | Revista Ceres |
| spelling | doaj.art-04f2da85a611403d81adc2c69ee53b132022-12-21T19:43:33ZengUniversidade Federal De ViçosaRevista Ceres2177-34912012-12-0159678178610.1590/S0034-737X2012000600007S0034-737X2012000600007Prediction of genetic gain from selection indices for disease resistance in papaya hybridsMarcelo Vivas0Silvaldo Felipe da Silveira1Messias Gonzaga Pereira2Universidade Estadual do Norte FluminenseUniversidade Estadual do Norte FluminenseUniversidade Estadual do Norte FluminenseIn order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. Genetic gains were estimated from the selection indices of Smith & Hazel, Pesek & Baker, Williams, Mulamba & Mock, with selection intensity of 22.39%, corresponding to 15 hybrids. The index of Mulamba & Mock showed gains more suitable for the five traits assessed when it was used the criterion of economic weight tentatively assigned. Together, severity of black spot on leaves and on fruits, characteristics considered most relevant to the selection of resistant materials, expressed percentage gain of -44.15%. In addition, there were gains for other characteristics, with negative predicted selective percentage gain. The results showed that the index of Mulamba & Mock is the most efficient procedure for simultaneous selection of papaya hybrid resistant to black spot, powdery mildew and phoma spot.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2012000600007&lng=en&tlng=enseleção combinadaresistência genéticaAsperisporium caricaeeStreptopodium caracaePhoma caricae-papayae |
| spellingShingle | Marcelo Vivas Silvaldo Felipe da Silveira Messias Gonzaga Pereira Prediction of genetic gain from selection indices for disease resistance in papaya hybrids Revista Ceres seleção combinada resistência genética Asperisporium caricaee Streptopodium caracae Phoma caricae-papayae |
| title | Prediction of genetic gain from selection indices for disease resistance in papaya hybrids |
| title_full | Prediction of genetic gain from selection indices for disease resistance in papaya hybrids |
| title_fullStr | Prediction of genetic gain from selection indices for disease resistance in papaya hybrids |
| title_full_unstemmed | Prediction of genetic gain from selection indices for disease resistance in papaya hybrids |
| title_short | Prediction of genetic gain from selection indices for disease resistance in papaya hybrids |
| title_sort | prediction of genetic gain from selection indices for disease resistance in papaya hybrids |
| topic | seleção combinada resistência genética Asperisporium caricaee Streptopodium caracae Phoma caricae-papayae |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2012000600007&lng=en&tlng=en |
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