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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Field Evaluation of Transgenic Wheat Expressing a Modified ADP-Glucose Pyrophosphorylase Large Subunit  [2007]

Meyer, F.D.; Talbert, L.E.; Martin, J.M.; Lanning, S.P.; et al.

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Wheat yield is influenced by the efficacy of seed starch biosynthetic enzymes. ADP-glucose pyrophosphorylase (AGP) catalyzes a rate-limiting step in seed starch biosynthesis. We transformed the hard spring wheat (Triticum aestivum L.) cultivar Hi-Line with a modified maize AGP large subunit sequence (Sh2r6hs) to increase AGP activity. In previously described growth chamber studies, Sh2r6hs conditioned increased AGP activity, seed yield, and plant size. The primary objective of this study was to determine whether a similar yield enhancement could be detected under field conditions. Sh2r6hs transgenics were field tested over four growing years, in three locations, with varying planting density and irrigation. The results indicate that significant yield increases were more likely to occur in space-planted, irrigated environments than densely planted, rainfed environments, suggesting that limited abiotic resources may subsequently limit Sh2r6hs-associated yield enhancement. In elite lines, as in the F2-derived trials in which tissue culture derived mutations were reduced by out-crossing, Sh2r6hs appears to confer a yield advantage only when field conditions are nonlimiting.
From the journal
Crop science
ISSN : 0011-183X

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
47
Issue:
1
Start Page:
336
End Page:
342
All titles:
"Field Evaluation of Transgenic Wheat Expressing a Modified ADP-Glucose Pyrophosphorylase Large Subunit"@eng
Other:
"Includes references"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
47
Issue:
1
Start Page:
336
End Page:
342
All titles:
"Field Evaluation of Transgenic Wheat Expressing a Modified ADP-Glucose Pyrophosphorylase Large Subunit"@eng
Other:
"Includes references"