MARC details
| 000 -LEADER |
|---|
| fixed length control field |
03914nab a22003977a 4500 |
| 001 - CONTROL NUMBER |
|---|
| control field |
61742 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
|---|
| control field |
20240111210424.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
|---|
| fixed length control field |
200428s2020 sz ||||| |||| 00| 0 eng d |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER |
|---|
| International Standard Serial Number |
1664-462X |
| 024 8# - OTHER STANDARD IDENTIFIER |
|---|
| Standard number or code |
https://doi.org/10.3389/fpls.2020.00474 |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloging agency |
MX-TxCIM |
| 041 ## - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
eng |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Tadesse, B. |
| Field link and sequence number |
001712791 |
| Miscellaneous information |
Global Maize Program |
| 9 (RLIN) |
1821 |
| 245 10 - TITLE STATEMENT |
|---|
| Title |
Genetic dissection of nitrogen use efficiency in tropical maize through genome-wide association and genomic prediction |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
|---|
| Place of publication, distribution, etc. |
Switzerland : |
| Name of publisher, distributor, etc. |
Frontiers, |
| Date of publication, distribution, etc. |
2020. |
| 500 ## - GENERAL NOTE |
|---|
| General note |
Peer review |
| 500 ## - GENERAL NOTE |
|---|
| General note |
Open Access |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
In sub-Saharan Africa, one of the major challenges to smallholder farmers is soil with low fertility and inability to apply nitrogen fertilizer externally due to the cost. Development of maize hybrids, which perform better in nitrogen depleted soils, is one of the promising solutions. However, breeding maize for nitrogen use efficiency (NUE) is hindered by expensive phenotypic evaluations and trait complexity under low N stress. Genome-wide association study (GWAS) and genomic prediction (GP) are promising tools to circumvent this interference. Here, we evaluated a mapping panel in diverse environments both under optimum and low N management. The objective of this study was to identify SNPs significantly associated with grain yield (GY) and other traits through GWAS and assess the potential of GP under low N and optimum conditions. Testcross progenies of 411 inbred lines were planted under optimum and low N conditions in several locations in Africa and Latin America. In all locations, low N fields were previously depleted over several seasons, and no N fertilizer was applied throughout the growing season. All inbred lines were genotyped with genotyping by sequencing. Genotypic and GxE interaction variances were significant, and heritability estimates were moderate to high for all traits under both optimum and low N conditions. Genome-wide LD decay at r2 = 0.2 and r2 = 0.34 were 0.24 and 0.19 Mbp, respectively. Chromosome-specific LD decays ranged from 0.13 to 0.34 Mbps with an average of 0.22 Mbp at r2 = 0.2. GWAS analyses revealed 38 and 45 significant SNPs under optimum and low N conditions, respectively. Out of these 83 significant SNPs, 3 SNPs on chromosomes 1, 2, and 6 were associated either with different traits or the same trait under different management conditions, suggesting pleiotropic effects of genes. A total of 136 putative candidate genes were associated with the significant SNPs, of which seven SNPs were linked with four known genes. Prediction accuracies were moderate to high for all traits under both optimum and low N conditions. These results can be used as useful resources for further applications to develop hybrids or lines with better performance under low N conditions. |
| 526 ## - STUDY PROGRAM INFORMATION NOTE |
|---|
| Program name |
Maize CRP |
| Maize Flagship Projects |
FP3 - Stress resilient and nutritious maize |
| 526 ## - STUDY PROGRAM INFORMATION NOTE |
|---|
| Program name |
EiB |
| 546 ## - LANGUAGE NOTE |
|---|
| Language note |
Text in English |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
12588 |
| Topical term or geographic name as entry element |
Genetic techniques |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
2912 |
| Topical term or geographic name as entry element |
Nitrogen |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Single nucleotide polymorphisms |
| 9 (RLIN) |
10805 |
| Source of heading or term |
AGROVOC |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
10737 |
| Topical term or geographic name as entry element |
Marker-assisted selection |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| 9 (RLIN) |
2259 |
| Personal name |
Labuschagne, M. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Field link and sequence number |
INT3333 |
| 9 (RLIN) |
923 |
| Personal name |
Olsen, M. |
| Miscellaneous information |
Global Maize Program |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Das, B. |
| Miscellaneous information |
Global Maize Program |
| -- |
Excellence in Breeding |
| Field link and sequence number |
INT2825 |
| 9 (RLIN) |
863 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Prasanna, B.M. |
| Miscellaneous information |
Global Maize Program |
| Field link and sequence number |
INT3057 |
| 9 (RLIN) |
887 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Field link and sequence number |
I1705963 |
| 9 (RLIN) |
795 |
| Personal name |
Gowda, M. |
| Miscellaneous information |
Global Maize Program |
| 773 0# - HOST ITEM ENTRY |
|---|
| Place, publisher, and date of publication |
Switzerland : Frontiers, 2020. |
| Related parts |
v. 11, art. 474 |
| Title |
Frontiers in Plant Science |
| Record control number |
u56875 |
| International Standard Serial Number |
1664-462X |
| 856 4# - ELECTRONIC LOCATION AND ACCESS |
|---|
| Link text |
Open Access through DSpace |
| Uniform Resource Identifier |
https://hdl.handle.net/10883/20843 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Article |
| Suppress in OPAC |
No |