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Effects of Selection for Lower Ear Height in Synthetic Populations of Maize 1
Author(s) -
Vera G. A.,
Crane P. L.
Publication year - 1970
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/cropsci1970.0011183x001000030022x
Subject(s) - biology , selection (genetic algorithm) , zea mays , grain yield , agronomy , poaceae , yield (engineering) , zoology , horticulture , materials science , artificial intelligence , computer science , metallurgy
Two populations of maize ( Zea mays L.) [Antigua 2D ✕ (B10 ✕ B14)] F5 and (Eto ✕ CBC) F5 were used a selection experiment conducted at Lafayette, Ind., to determine the effectiveness of 50% selection intensity in lowering ear height. These two populations were subjected to two cycles of selection, each followed by a generation of random intermating in Florida. The lowereared 50% of the plants in each day of silking was selected to avoid confounding selection for ear height with date of flowering. The evaluations of the subpopulations per se derived by selection and the topcrosses of these subpopulations with five single‐cross testers were made in three locations in 1968. The results showed that selection was effective in lowering the ear height 4.5% per cycle. There was no effect on percent moisture. A slight reduction in yield and a more pronounced reduction in percent lodging were statistically nonsignificant.