MARC details
| 000 -LEADER |
|---|
| fixed length control field |
04342nab a22004577a 4500 |
| 001 - CONTROL NUMBER |
|---|
| control field |
61199 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
|---|
| control field |
20240919020951.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
|---|
| fixed length control field |
200108s2019 sz |||p|op||| 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.2019.01502 |
| 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 |
|---|
| Field link and sequence number |
INT2891 |
| 9 (RLIN) |
870 |
| Personal name |
Beyene, Y. |
| Miscellaneous information |
Global Maize Program |
| 245 10 - TITLE STATEMENT |
|---|
| Title |
Empirical comparison of tropical maize hybrids selected through genomic and phenotypic selections |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
|---|
| Place of publication, distribution, etc. |
Switzerland : |
| Name of publisher, distributor, etc. |
Frontiers, |
| Date of publication, distribution, etc. |
2019. |
| 500 ## - GENERAL NOTE |
|---|
| General note |
Peer review |
| 500 ## - GENERAL NOTE |
|---|
| General note |
Open Access |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
Genomic selection predicts the genomic estimated breeding values (GEBVs) of individuals not previously phenotyped. Several studies have investigated the accuracy of genomic predictions in maize but there is little empirical evidence on the practical performance of lines selected based on phenotype in comparison with those selected solely on GEBVs in advanced testcross yield trials. The main objectives of this study were to (1) empirically compare the performance of tropical maize hybrids selected through phenotypic selection (PS) and genomic selection (GS) under well-watered (WW) and managed drought stress (WS) conditions in Kenya, and (2) compare the cost–benefit analysis of GS and PS. For this study, we used two experimental maize data sets (stage I and stage II yield trials). The stage I data set consisted of 1492 doubled haploid (DH) lines genotyped with rAmpSeq SNPs. A subset of these lines (855) representing various DH populations within the stage I cohort was crossed with an individual single-cross tester chosen to complement each population. These testcross hybrids were evaluated in replicated trials under WW and WS conditions for grain yield and other agronomic traits, while the remaining 637 DH lines were predicted using the 855 lines as a training set. The second data set (stage II) consists of 348 DH lines from the first data set. Among these 348 best DH lines, 172 lines selected were solely based on GEBVs, and 176 lines were selected based on phenotypic performance. Each of the 348 DH lines were crossed with three common testers from complementary heterotic groups, and the resulting 1042 testcross hybrids and six commercial checks were evaluated in four to five WW locations and one WS condition in Kenya. For stage I trials, the cross-validated prediction accuracy for grain yield was 0.67 and 0.65 under WW and WS conditions, respectively. We found similar responses to selection using PS and GS for grain yield other agronomic traits under WW and WS conditions. The top 15% of hybrids advanced through GS and PS gave 21%–23% higher grain yield under WW and 51%–52% more grain yield under WS than the mean of the checks. The GS reduced the cost by 32% over the PS with similar selection gains. We concluded that the use of GS for yield under WW and WS conditions in maize can produce selection candidates with similar performance as those generated from conventional PS, but at a lower cost, and therefore, should be incorporated into maize breeding pipelines to increase breeding program efficiency. |
| 526 ## - STUDY PROGRAM INFORMATION NOTE |
|---|
| Program name |
Maize CRP |
| Maize Flagship Projects |
FP2 - Novel tools, technologies and traits for improving genetic gains and breeding efficiency |
| -- |
FP3 - Stress resilient and nutritious maize |
| 546 ## - LANGUAGE NOTE |
|---|
| Language note |
Text in English |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
3634 |
| Topical term or geographic name as entry element |
Phenotypes |
| 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 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
2091 |
| Topical term or geographic name as entry element |
Genetic gain |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Maize |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1173 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1151 |
| Topical term or geographic name as entry element |
Hybrids |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1081 |
| Topical term or geographic name as entry element |
Drought stress |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Field link and sequence number |
I1705963 |
| 9 (RLIN) |
795 |
| Personal name |
Gowda, M. |
| Miscellaneous information |
Global Maize Program |
| 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 |
|---|
| 9 (RLIN) |
5987 |
| Personal name |
Robbins, K. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| 9 (RLIN) |
2703 |
| Personal name |
Perez-Rodriguez, P. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Field link and sequence number |
N1202289 |
| 9 (RLIN) |
1935 |
| Personal name |
Alvarado Beltrán, G. |
| Miscellaneous information |
Genetic Resources Program |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Field link and sequence number |
I1706147 |
| 9 (RLIN) |
808 |
| Personal name |
Dreher, K.A. |
| Miscellaneous information |
Genetic Resources Program |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Yanxin Gao |
| Field link and sequence number |
001713594 |
| Miscellaneous information |
Formerly Excellence in Breeding |
| 9 (RLIN) |
5786 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Mugo, S.N. |
| Miscellaneous information |
Formerly Global Maize Program |
| Field link and sequence number |
INT2460 |
| 9 (RLIN) |
840 |
| 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 |
|---|
| Personal name |
Crossa, J. |
| Miscellaneous information |
Genetic Resources Program |
| Field link and sequence number |
CCJL01 |
| 9 (RLIN) |
59 |
| 773 0# - HOST ITEM ENTRY |
|---|
| Place, publisher, and date of publication |
Switzerland : Frontiers, 2019. |
| Related parts |
v. 10, art. 1502 |
| 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/10883/20636 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Article |
| Suppress in OPAC |
No |