Genetic gains in physic nut using selection indexes
The objective of this work was to estimate genetic gains in physic nut (Jatropha curcas) using selection indexes and to establish the best selection strategy for the species. Direct and indirect selection was carried out using different selection indexes, totalizing 14 strategies. One hundred and se...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Embrapa Informação Tecnológica
2012-03-01
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| Series: | Pesquisa Agropecuária Brasileira |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000300012&lng=en&tlng=en |
| _version_ | 1818540312329453568 |
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| author | Leonardo Lopes Bhering Bruno Galvêas Laviola Caio Césio Salgado Carlos Felipe Barrera Sanchez Tatiana Barbosa Rosado Alexandre Alonso Alves |
| author_facet | Leonardo Lopes Bhering Bruno Galvêas Laviola Caio Césio Salgado Carlos Felipe Barrera Sanchez Tatiana Barbosa Rosado Alexandre Alonso Alves |
| author_sort | Leonardo Lopes Bhering |
| collection | DOAJ |
| description | The objective of this work was to estimate genetic gains in physic nut (Jatropha curcas) using selection indexes and to establish the best selection strategy for the species. Direct and indirect selection was carried out using different selection indexes, totalizing 14 strategies. One hundred and seventy five families from the active germplasm bank of Embrapa Agroenergy, Brasília, Brazil, were analyzed in a randomized complete block design with two replicates. The evaluated traits were: grain yield; seeds per fruit; endosperm/seed ratio; seed weight, length, width, and thickness; branches per plant at 0.5, 1.0, and 1.5 m; plant height; stem diameter; canopy projection on rows and between lines; canopy volume; juvenility (days to the first flowering); and height of the first inflorescence. Evaluations were done during the second year of cultivation. The use of selection indexes is relevant to maximize the genetic gains in physic nut, favoring a better distribution of desirable traits. The multiplicative and restrictive indexes are considered the most promising for selection. |
| first_indexed | 2024-12-11T21:53:41Z |
| format | Article |
| id | doaj.art-219a38971ebc434dbf252fdafefb7ab5 |
| institution | Directory Open Access Journal |
| issn | 1678-3921 |
| language | English |
| last_indexed | 2024-12-11T21:53:41Z |
| publishDate | 2012-03-01 |
| publisher | Embrapa Informação Tecnológica |
| record_format | Article |
| series | Pesquisa Agropecuária Brasileira |
| spelling | doaj.art-219a38971ebc434dbf252fdafefb7ab52022-12-22T00:49:23ZengEmbrapa Informação TecnológicaPesquisa Agropecuária Brasileira1678-39212012-03-0147340240810.1590/S0100-204X2012000300012S0100-204X2012000300012Genetic gains in physic nut using selection indexesLeonardo Lopes Bhering0Bruno Galvêas Laviola1Caio Césio Salgado2Carlos Felipe Barrera Sanchez3Tatiana Barbosa Rosado4Alexandre Alonso Alves5Universidade Federal de ViçosaEmbrapaUniversidade Federal de ViçosaUniversidade Federal de ViçosaEmbrapaEmbrapaThe objective of this work was to estimate genetic gains in physic nut (Jatropha curcas) using selection indexes and to establish the best selection strategy for the species. Direct and indirect selection was carried out using different selection indexes, totalizing 14 strategies. One hundred and seventy five families from the active germplasm bank of Embrapa Agroenergy, Brasília, Brazil, were analyzed in a randomized complete block design with two replicates. The evaluated traits were: grain yield; seeds per fruit; endosperm/seed ratio; seed weight, length, width, and thickness; branches per plant at 0.5, 1.0, and 1.5 m; plant height; stem diameter; canopy projection on rows and between lines; canopy volume; juvenility (days to the first flowering); and height of the first inflorescence. Evaluations were done during the second year of cultivation. The use of selection indexes is relevant to maximize the genetic gains in physic nut, favoring a better distribution of desirable traits. The multiplicative and restrictive indexes are considered the most promising for selection.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000300012&lng=en&tlng=enJatropha curcasbiodieselvolume de copaCerradojuvenilidadetamanho de sementes |
| spellingShingle | Leonardo Lopes Bhering Bruno Galvêas Laviola Caio Césio Salgado Carlos Felipe Barrera Sanchez Tatiana Barbosa Rosado Alexandre Alonso Alves Genetic gains in physic nut using selection indexes Pesquisa Agropecuária Brasileira Jatropha curcas biodiesel volume de copa Cerrado juvenilidade tamanho de sementes |
| title | Genetic gains in physic nut using selection indexes |
| title_full | Genetic gains in physic nut using selection indexes |
| title_fullStr | Genetic gains in physic nut using selection indexes |
| title_full_unstemmed | Genetic gains in physic nut using selection indexes |
| title_short | Genetic gains in physic nut using selection indexes |
| title_sort | genetic gains in physic nut using selection indexes |
| topic | Jatropha curcas biodiesel volume de copa Cerrado juvenilidade tamanho de sementes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000300012&lng=en&tlng=en |
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