Genetic gain prediction for wheat with different selection criteria

The objective of this study was to compare different criteria of simultaneous environment selection based onestimated gains to identify the most appropriate ones. Two hundred and forty F2:4 families derived from eight segregatingwheat populations were evaluated. The experiments were conducted on the...

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Bibliographic Details
Published in:Crop breeding and applied biotechnology 2007, Vol.7 (4), p.334-339
Main Authors: Cargnin, A., Souza, M.A., Machado, C.G., Pimentel, A.J.B.
Format: Article
Language:English
Subjects:
environment
improvement
selection indices
Triticum aestivum L
Wheat
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Summary:The objective of this study was to compare different criteria of simultaneous environment selection based onestimated gains to identify the most appropriate ones. Two hundred and forty F2:4 families derived from eight segregatingwheat populations were evaluated. The experiments were conducted on the field, with sowings in the summer and the winter,in 2004. The highest gains were estimated by direct selection in each cultivation environment, with negative gain estimates forthe indirect response in the other environment. All indices were more adequate for simultaneous selection of environmentssince the total gains were higher and more evenly distributed in the two environments. The index based on “desired gains”obtained the highest gains in the three situations. Selection indices are advantageous, since the selection efficiency in wheatbreeding programs is improved.
ISSN:1984-7033
1518-7853
1984-7033
DOI:10.12702/1984-7033.v07n04a01