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Genetic architecture for yield potential, density tolerance, and yield stability in maize (Zea mays L)

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dc.contributor.advisor Lee, Elizabeth A. Holtrop, Andrew 2016-09-12T17:01:03Z 2016-09-12T17:01:03Z 2016-08 2016-06-01 2016-09-12
dc.description.abstract Plant breeders through selection accumulate favorable traits such as density tolerance, grain yield and grain yield stability. Only traits controlled by additive genetic effects can be predictably selected and improved upon. We investigated the genetic architecture of two traits: density tolerance, which has improved via selection, and yield potential, which has not. Using a North Carolina Design II genetic model, estimates of the magnitude of additive genetic effects for grain yield under low density (37 000 plants ha-1), commercial density (74 000 plants ha-1) and high density (148 000 plants ha-1) were calculated for a set of elite inbred lines. Type II stability statistics (b-values) were also calculated. No link was seen between b-values and density tolerance. Significant additive genetic variation was observed at each of the three densities tested, suggesting genetic variation for yield potential and for density tolerance. No association was observed between yield potential and density. en_US
dc.description.sponsorship GFO OMAF NSERC Syngenta en_US
dc.language.iso en en_US
dc.subject Maize en_US
dc.subject Corn en_US
dc.subject Combining Ability en_US
dc.subject Type II stability en_US
dc.subject GCA en_US
dc.subject SCA en_US
dc.subject Yield Potential en_US
dc.subject Yield Stability en_US
dc.subject Hybrid en_US
dc.subject Inbred en_US
dc.subject NC II en_US
dc.subject Non-Additive Genetic en_US
dc.subject North Carolina Design II en_US
dc.subject Additive Genetic en_US
dc.title Genetic architecture for yield potential, density tolerance, and yield stability in maize (Zea mays L) en_US
dc.type Thesis en_US Plant Agriculture en_US Master of Science en_US Department of Plant Agriculture en_US
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