Date

1-4-2016 12:00 AM

Major

Agronomy; Horticulture

Department

Agronomy

College

College of Agriculture and Life Sciences

Project Advisor

Jianming Yu

Project Advisor's Department

Agronomy

Description

Heterosis, the relative increase in fitness of a hybrid offspring as compared to its parents, has contributed significantly to gains made through plant breeding. This phenomenon is most often observed in tall hybrid plants with increased vigor; however, the physiological mechanism behind this result is still poorly understood. This experiment presents the effect of several height-controlling genes in sorghum across its growth stages, examining changes in expression as plant development proceeds. QTL mapping revealed an early-acting height gene in chromosome 4, as well as fluctuations in previously identified regions in chromosomes 7 and 9. Mapping across growth stages allowed the changing effects of these genes to be observed, which is not possible when measurements are taken only after plants have reached maturity.

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Apr 1st, 12:00 AM

Mapping quantitative height traits in sorghum across growth stages

Heterosis, the relative increase in fitness of a hybrid offspring as compared to its parents, has contributed significantly to gains made through plant breeding. This phenomenon is most often observed in tall hybrid plants with increased vigor; however, the physiological mechanism behind this result is still poorly understood. This experiment presents the effect of several height-controlling genes in sorghum across its growth stages, examining changes in expression as plant development proceeds. QTL mapping revealed an early-acting height gene in chromosome 4, as well as fluctuations in previously identified regions in chromosomes 7 and 9. Mapping across growth stages allowed the changing effects of these genes to be observed, which is not possible when measurements are taken only after plants have reached maturity.