Genetic gains in physic nut using selection indexes

Authors

  • Leonardo Lopes Bhering Universidade Federal de Viçosa, Departamento de Biologia Geral, Avenida P.H. Rolfs, s/no, Campus Universitário, CEP 36570‑000 Viçosa, MG, Brazil
  • Bruno Galveas Laviola Embrapa Agroenergia, Parque Estação Biológica (PqEB), s/no, CEP 70770‑901 Brasília, DF, Brazil
  • Caio Césio Salgado Universidade Federal de Viçosa, Departamento de Biologia Geral, Avenida P.H. Rolfs, s/no, Campus Universitário, CEP 36570‑000 Viçosa, MG, Brazil
  • Carlos Felipe Barrera Sanches Universidade Federal de Viçosa, Departamento de Biologia Geral, Avenida P.H. Rolfs, s/no, Campus Universitário, CEP 36570‑000 Viçosa, MG, Brazil
  • Tatiana Barbosa Rosado Embrapa Agroenergia, Parque Estação Biológica (PqEB), s/no, CEP 70770‑901 Brasília, DF, Brazil
  • Alexandre Alonso Alves Embrapa Agroenergia, Parque Estação Biológica (PqEB), s/no, CEP 70770‑901 Brasília, DF, Brazil

DOI:

https://doi.org/10.1590/S1678-3921.pab2012.v47.11661

Keywords:

Jatropha curcas, biodiesel, canopy volume, Cerrado, juvenility, seed size

Abstract

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.

Author Biographies

Leonardo Lopes Bhering, Universidade Federal de Viçosa, Departamento de Biologia Geral, Avenida P.H. Rolfs, s/no, Campus Universitário, CEP 36570‑000 Viçosa, MG, Brazil

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Bruno Galveas Laviola, Embrapa Agroenergia, Parque Estação Biológica (PqEB), s/no, CEP 70770‑901 Brasília, DF, Brazil

http://lattes.cnpq.br/3008972872111623

Caio Césio Salgado, Universidade Federal de Viçosa, Departamento de Biologia Geral, Avenida P.H. Rolfs, s/no, Campus Universitário, CEP 36570‑000 Viçosa, MG, Brazil

http://lattes.cnpq.br/3824742152089733

Carlos Felipe Barrera Sanches, Universidade Federal de Viçosa, Departamento de Biologia Geral, Avenida P.H. Rolfs, s/no, Campus Universitário, CEP 36570‑000 Viçosa, MG, Brazil

http://lattes.cnpq.br/7419415290331728

Tatiana Barbosa Rosado, Embrapa Agroenergia, Parque Estação Biológica (PqEB), s/no, CEP 70770‑901 Brasília, DF, Brazil

http://lattes.cnpq.br/8615282232921106

Alexandre Alonso Alves, Embrapa Agroenergia, Parque Estação Biológica (PqEB), s/no, CEP 70770‑901 Brasília, DF, Brazil

http://lattes.cnpq.br/4110876087072957

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Published

2012-04-23

How to Cite

Bhering, L. L., Laviola, B. G., Salgado, C. C., Sanches, C. F. B., Rosado, T. B., & Alves, A. A. (2012). Genetic gains in physic nut using selection indexes. Pesquisa Agropecuaria Brasileira, 47(3), 402–408. https://doi.org/10.1590/S1678-3921.pab2012.v47.11661

Issue

v.47, n.3, mar. 2012

Section

GENETICS