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Your search keyword '"Baozhu Guo"' showing total 4 results
Start Over Author "Baozhu Guo" Journal crop science
4 results on '"Baozhu Guo"'

2. Identification of Resistance to Aflatoxin Accumulation and Yield Potential in Maize Hybrids in the Southeast Regional Aflatoxin Trials (SERAT)

Author

Nancy J. Wahl, Joseph E. Knoll, Xinzhi Ni, Wenwei Xu, K. Mayfield, Baozhu Guo, Matthew D. Krakowsky, Javier Betrán, Brian T. Scully, Gary L. Windham, Thomas Isakeit, Seth C. Murray, and W. Paul Williams

Subjects
0106 biological sciences, Germplasm, Aflatoxin, Resistance (ecology), Crop yield, 04 agricultural and veterinary sciences, Biology, Plant disease resistance, 01 natural sciences, chemistry.chemical_compound, Agronomy, chemistry, Yield (wine), 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Mycotoxin, Agronomy and Crop Science, 010606 plant biology & botany, Hybrid
Published
2017

3. Generation of Expressed Sequence Tags (ESTs) for Gene Discovery and Marker Development in Cultivated Peanut

Author

Baozhu Guo, M. Luo, C. Corley Holbrook, G. He, Phat M. Dang, Michael G. Bausher, and R. D. Lee

Subjects
Genetics, Expressed sequence tag, Genetic marker, cDNA library, Complementary DNA, GenBank, food and beverages, Genomic library, Marker-assisted selection, Biology, Agronomy and Crop Science, Homology (biology)
Abstract

Expressed sequence tag (EST) libraries for cultivated peanut (Arachis hypogaea L.) were developed from two cDNA libraries constructed by means of mRNA prepared from leaves of peanut line C34-24 (resistant to leaf spots and Tomato spotted wilt virus) and immature pods of peanut line A13 (tolerant to drought stress and preharvest aflatoxin contamination). Randomly selected cDNA clones were partially sequenced to generate a total of 1825 ESTs, 769 from the C34-24 cDNA library and 1056 from the A13 cDNA library, in which 536 and 769 unique ESTs were identified, respectively. Results of BLASTx search showed that 52.8% of the ESTs from leaf tissue and 78.6% of the ESTs from the pod tissue have homology to genes of known function. Approximately 27.3 and 22.1% of ESTs matching homologous sequences in dbEST of GenBank on the basis of BLASTn algorithm have unknown functions. The ESTs were queried against MIPS functional catalog criteria and sorted according to putative function into 15 categories. A total of 1345 ESTs have been released to GenBank'. Four hundred unigenes have been selected from these ESTs and arrayed on glass slides for gene expression analysis, and 44 EST-derived simple sequence repeat (SSR) markers have been characterized for cultivated peanut, in which over 20% of the SSRs produced polymorphic markers among 24 cultivated peanut genotypes. This is the first report of ESTs in cultivated peanut, and further characterization of resistance and stress genes may explain mechanisms functioning in these two peanut lines.

Published
2005

4. Identification of Resistance to Aflatoxin Accumulation and Yield Potential in Maize Hybrids in the Southeast Regional Aflatoxin Trials (SERAT).

Author

Wahl, Nancy, Murray, Seth C., Isakeit, Thomas, Krakowsky, Matthew, Windham, Gary L., Williams, W. Paul, Baozhu Guo, Xinzhi Ni, Knoll, Joseph, Wenwei Xu, Scully, Brian, Mayfield, Kerry, and Betran, Javier

Subjects
AFLATOXINS, CORN farming, AGRICULTURE & the environment
Abstract

Aflatoxins pose a serious health hazard to humans and livestock, requiring significant economic cost in identifying and disposing of contaminated grain. Since 2003, a multi-environmental trial of public breeding maize (Zea mays L.) hybrids across multiple programs in the southeastern United States has evaluated accumulation of aflatoxin following inoculation with the fungus Aspergillus flavus Link. The Southeast Regional Aflatoxin Trial (SERAT) was formed to identify public germplasm with the most consistent resistance to aflatoxin accumulation and to evaluate their essential agronomic traits in different environments. Yield and related agronomic traits were evaluated in 13 locations; aflatoxin levels were evaluated in four. From 2006 to 2015, the 295 experimental hybrids, composed of varying percentages of tropical and subtropical germplasm, exhibited lower levels of aflatoxin on average at 323 versus 370 ng g−1 for the commercial checks, while the check average of 10.1 Mg ha−1 exceeded the research program average yield by 20%. Repeatability for log-transformed aflatoxin levels exceeded 0.50 in most years, while yield was mostly above 0.75. Testing for Type II stability indicated a positive response of high-yielding lines to better environments. The SERAT program enabled the identification of 13 top-performing experimental hybrids that have yielded on par with or exceeded check averages and had aflatoxin levels significantly lower than check averages. [ABSTRACT FROM AUTHOR]

Published
2017
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