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A multiplicative selection index applied to 4 cycles of full sib recurrent selection in maize zea mays



A multiplicative selection index applied to 4 cycles of full sib recurrent selection in maize zea mays



Crop Science 22(5): 981-983



A condensed form of full-sib family recurrent selection in maize (Z. mays L.) is described that requires 2 growing seasons/cycle. Results of 4 cycles of selection in the open-pollinated cv. Krug in Nebraska [USA] are reported. The selection criterion was a multiplicative selection index composed of grain yield adjusted by proportion of dry matter .times. proportion of upright plants .times. proportion of plants without dropped ears. Yield increased 2.9 quintals/ha per cycle (4.7%) whereas the index increased 2.8 quintals/ha per cycle (5.8%). Proportions of dry matter, upright plants and plants without dropped ears showed nonsignificant but positive changes.

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Accession: 004590644

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