Fuzzy logic in automation for interpretation of adaptability and stability in plant breeding studies

Anna Regina Tiago Carneiro Demerson Arruda Sanglard Alcinei Mistico Azevedo Thiago Lívio Pessoa Oliveira de Souza Helton Santos Pereira Leonardo Cunha Melo About the authors

ABSTRACT:

The methods of Annicchiarico (1992)Annicchiarico, P. 1992. Cultivar adaptation and recommendation from alfafa trials in northern Italy. Journal of Genetics and Breeding 46: 269-278. and Cruz et al. (1989)Cruz, C.D.; Torres, R.A.; Vencovsky, R. 1989. An alternative approach to the stability analysis proposed by Silva and Barreto. Revista Brasileira de Genética 12: 567-580. are widely used in phenotypic adaptability and stability analyses in plant breeding. In spite of the importance of these methodologies, their parameters are difficult to interpret. The aim of this research was to develop fuzzy controllers to automate the decision-making process employed by adaptability and stability studies following the methods adopted by Annicchiarico (1992)Annicchiarico, P. 1992. Cultivar adaptation and recommendation from alfafa trials in northern Italy. Journal of Genetics and Breeding 46: 269-278. and Cruz et al. (1989)Cruz, C.D.; Torres, R.A.; Vencovsky, R. 1989. An alternative approach to the stability analysis proposed by Silva and Barreto. Revista Brasileira de Genética 12: 567-580. and check their efficiency using experimental data from common bean cultivars. Fuzzy controllers have been developed based on the Mamdani inference system proposed by these two methods of adaptability and stability studies. For the first fuzzy controller parameters were considered favorable environments and the recommendation index for unfavorable environments obtained by Annicchiarico's method (1992)Annicchiarico, P. 1992. Cultivar adaptation and recommendation from alfafa trials in northern Italy. Journal of Genetics and Breeding 46: 269-278.. For the second controller the parameters considered were the general mean (β0), coefficient of regression of unfavorable environments (β1) and coefficient of favorable environments (β1i + β2i) and the coefficient of determination of the method of Cruz et al. (1989)Cruz, C.D.; Torres, R.A.; Vencovsky, R. 1989. An alternative approach to the stability analysis proposed by Silva and Barreto. Revista Brasileira de Genética 12: 567-580.. To check the performance of these drivers yield data from field trials on 18 common bean cultivars grown in 11 environments were used. The controllers were developed from established routines in the R software and, using the inference system based on the methods proposed by Annicchiarico (1992)Annicchiarico, P. 1992. Cultivar adaptation and recommendation from alfafa trials in northern Italy. Journal of Genetics and Breeding 46: 269-278. and Cruz et al. (1989)Cruz, C.D.; Torres, R.A.; Vencovsky, R. 1989. An alternative approach to the stability analysis proposed by Silva and Barreto. Revista Brasileira de Genética 12: 567-580., classified the 18 genotypes appropriately in accordance with the criteria for each method. Thus, the methods used are effective, and are prescribed for decision-making automation in yield adaptability and stability studies pertaining to recommendation of cultivars.

Keywords:
common bean; genotype by environment interaction; crop breeding; computational intelligence

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