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Effectiveness of Selection in Successive Generations of Maize Inbred Progenies for Improvement of Hybrid Yield 1
Author(s) -
ElLakany M. A.,
Russell W. A.
Publication year - 1971
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1971.0011183x001100050030x
Subject(s) - selection (genetic algorithm) , biology , zea mays , yield (engineering) , inbred strain , agronomy , microbiology and biotechnology , genetics , gene , physics , computer science , thermodynamics , artificial intelligence
The F 1 , F 2 , F 3 , and F 4 generations of 20 selected maize ( Zea mays L.) inbred families were evaluated by testcross performance to determine the efficacy of selection in three successive segregating generations to improve combining ability for yield. Ten lines had high yield performance and 10 lines had low yield performance as determined by testcrosses of the F 5 or F 6 generation. The high‐performance families had F 2 's equal to, or better than, their F 1 source, and nine families were improved by selection in the F 3 or F 4 , or both. Five low‐performance families had F 2 yields below those of the F 1 source, and not enough gain by selection was realized to have the F 4 at the yield level of the F 1 . The other five low‐performance families had F 2 yields at least equal to their F 1 source, but no further gains in yield were obtained by selection.