Environment adaptability and yield stability of cowpea cultivars in Rio Grande do Norte state, northeastern Brazil

Authors

  • João Batista Fernandes
  • José Simplício de Holanda
  • Auri Alaécio Simplício
  • Francisco Bezerra Neto
  • José Torres
  • José Rego Neto

DOI:

https://doi.org/10.1590/S1678-3921.pab1990.v25.13686

Keywords:

Finlay & Wilkinson method, Eberhart & Russeil method, linear regression method, regression coeficient.

Abstract

Cowpea cultivars (Vigna unguiculata (L.) Waip) have been tested as to their adaptability and yield stability in seven environments of both Açu-Apodi and Natal microregions of Rio Grande do Norte State, Northeastern Brazil. Eberhart & Russell method of stability analysis was uscd for both brown and cream seed materials, and Finlay & Wilkinson test for white seed materials. With regards to brown and cream seed materials, cultivars like Liso, Mozart, Pitiúba, Sempre Verde, and Alagoas V-4, as well as CNC 21-07E une presented average yield stability and adaptability. The tines CNC 164-03E and CNC 321-1E showed stability and specific adaptation to unfavorable environments. Concerning white seed materials, lines like CNC 177-05E and CNC 177-O1E, and the cultivar Riso do Ano, had average yield stability and wide adaptability. A high degree of yield stability and wide adaptability were characteristics of CNC 176-01E tine

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How to Cite

Fernandes, J. B., Holanda, J. S. de, Simplício, A. A., Neto, F. B., Torres, J., & Neto, J. R. (2014). Environment adaptability and yield stability of cowpea cultivars in Rio Grande do Norte state, northeastern Brazil. Pesquisa Agropecuaria Brasileira, 25(11), 1555–1560. https://doi.org/10.1590/S1678-3921.pab1990.v25.13686

Issue

v.25, n.11, nov. 1990

Section

CROP SCIENCE