A Multiplicative Selection Index Applied to Four Cycles of Full-Sib Recurrent Selection in Maize1
- W. A. Compton and
- J. H. Lonnquist2
A condensed form of full-sib family recurrent selection in maize (Zea mays L.) is described that requires two growing seasons per cycle. Results of four cycles of selection in the open-pollinated variety Krug in Nebraskare reported. The selection criterion was a multiplicative selection index composed of grain yield adjusted by proportion of dry matter ✕ proportion of upright plants ✕ proportion of plants without dropped ears. Yield increased 2.9 quintals/ha/cycle (4.7%) whereas the index increased 2.8 quintals/ha/cycle (5.8%). Proportions of dry matter, upright plants, and plants without dropped ears showed non-significant but positive changes.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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