Plant stand failures effect in genetic parameters estimation procedure in Eucalyptus sp.

• Yanca Araujo Frias

  Author

• Osmar Gabriel Trigo Marques de Oliveira

  Author

• João Victor Tino Dellaqua

  Author

• Evandro Pereira Prado

  Author

• Paulo Renato Matos Lopes

  Author

• Ronaldo Cintra Lima

  Author

• Cosme Damião Cruz

  Author

• Rafael Simões Tomaz

  Author

The objective of this work was to verify the influence of the percentage of failures in a forest genetics experiment in the estimation of genetic parameters. The study consisted in the evaluation of two experiments of full‑sib families under randomized complete block design with three replicates conducted in the state of Minas Gerais, Brazil. The experiment I was evaluated in January 2002, with approximately 60 months of age. The experiment II was evaluated in January 2003, with 45 months of age. In both experiments, the evaluations consisted of the measurement of the diameter at breast height and plant height. For all the investigated genetic parameters, an increase in the amplitude of the estimates was verified due to the increase in the number of experimental failures. Variances and negative heritabilities were detected, from 35% of failure, indicating that in such cases, this proportion of failure may be problematic to estimate genetic values, to estimate the gain with the selective process and for make decision.

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Copyright (c) 2020 Yanca Araujo Frias, Osmar Gabriel Trigo Marques de Oliveira, João Victor Tino Dellaqua, Evandro Pereira Prado, Paulo Renato Matos Lopes, Ronaldo Cintra Lima, Cosme Damião Cruz, Rafael Simões Tomaz

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