Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 21:132-134 (1981)
© 1981 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Yield Stability of Forage Sorghum in Northeastern Brazil1

M. A. Faris, M. R. A. de Araujo and M. de A. Lira2

Ten forage sorghum [Sorghum bicolor (L.) Moench] selections, one commercial sorghum cultivar, and one local maize (Zea mays L.) cultivar were grown in replicated trials at 12 locations in the semi-arid tropics of northeastern Brazil for 3 years. Superiority of some of the new selections in forage dry matter production over the commercial cultivar and corn check was demonstrated.

The combined analysis revealed that entries (G), environments (E), and the G x E interaction were highly significant. However, some nonlinearity existed which necessitated transformation of the data to the logarithmic scale which gave better fitting regression lines. Two of the highest yielding entries possessed the greatest stability. The results showed that better data interpretation came from the log transformed data and that stability parameters should be considered in selection among high yielding cultivars.

Key Words: Genotype-environment interaction • Sorghum bicolor (L.) Moench • Adaptation

1 Contribution No. 609 from the Ottawa Res. Stn., Research Branch, Agriculture Canada, Ottawa, Ontario KIA 0C6 and from the Agric. Res. Institute of Pernambuco (IPA), C. Postal 1022, 50.000 Recife, Pernambuco, Brazil.

2 Formerly visiting professor and project specialist, Agric. Res. Institute of Pernambuco, Recife, Brazil, The Ford Foundation, Brazil field office (currently research scientist, Agric. Canada Res. Stn., Ottawa, Ontario K1A 0C6, Canada); graduate student, Macdonald College of McGill Univ., Quebec, Hgx 1C0, Canada; and Technical consultant to the sorghum program, Agric. Res. Institute of Pernambuco (IPA), Recife 50.000, Brazil.

Received for publication March 3, 1980.




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Copyright © 1981 by the Crop Science Society of America.