MARC details
| 000 -LEADER |
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| fixed length control field |
03301nam a22003857a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G65816 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20240919021050.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
121211s ||||f| 0 p|p||0|| | |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
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| International Standard Book Number |
968-6923-93-4 |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
MX-TxCIM |
| 072 #0 - SUBJECT CATEGORY CODE |
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| Subject category code |
F30 |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
633.153 |
| Item number |
EDM |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Edmeades, G.O. |
| Affiliation |
Developing Drought- and Low N-Tolerant Maize. Proceedings of a Symposium; El Batan, Tex. (Mexico); 25- 29 Mar 1996 |
| 110 2# - MAIN ENTRY--CORPORATE NAME |
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| Corporate name or jurisdiction name as entry element |
Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) |
| 245 00 - TITLE STATEMENT |
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| Title |
Value of secondary traits in selecting for drought tolerance in tropical maize |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
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| Place of publication, distribution, etc. |
Mexico, DF (Mexico) |
| Name of publisher, distributor, etc. |
CIMMYT : |
| Date of publication, distribution, etc. |
1997 |
| 340 ## - PHYSICAL MEDIUM |
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| Material base and configuration |
Printed |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
The use of adaptive traits which are secondary to the primary trait, grain yield, when improving drought tolerance is often advocated, even though their relationships to yield and their contribution to increased yield under water deficits are poorly quantified. Secondary traits should be (i) genetically variable and genetically associated with grain yield in the target environment; (ii) highly heritable; (iii) easy to measure; (iv) observed at or before flowering; and (v) provide an estimate of yield potential well before final harvest. The value of secondary traits can be established by correlation analysis, by comparison of near-isogenic lines, or by divergent selection for the trait of interest. Secondary traits examined thus far at CIMMYT include anthesis-silking interval (ASI), leaf and stem elongation rate under drought versus well-watered conditions (RLE), canopy temperature (CT), leaf rolling and erectness scores (LRS; LES), leaf chlorophyll concentration (CHL), staygreen score (LDS), tassel size (TS), leaf osmotic concentration (OSM) and lodging (LOD). Relationships between yield and yield components (weight kernel-1, kernels ear -1, ears plant -1 (WPK, KPE, EPP)) have also been determined. Correlations between some of these traits and grain yield under drought are: large (0.5-0.9)for EPP, KPE, PH, TS, and ASI; low (0.1-0.4)for WPK, CT, LDS, CHL and OSM; and <0.1 for LOD, LRS, RLE, LES and TBN. Divergent selection (4% selection intensity in each direction) showed that realized heritability and adaptive value of ASI and EPP were high (not higher than yield alone, however), while those for LDS and CT were low. LES, TS and OSM had little effect on yield, though LES and TS were highly heritable and OSM moderately so. Results suggest that selecting for a combination of these traits in addition to yield should result in faster improvements in yield and yield stability under drought compared with selection for yield alone, and possibly at no cost to yield under well-watered conditions. |
| 546 ## - LANGUAGE NOTE |
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| Language note |
English |
| 591 ## - CATALOGING NOTES |
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| Affiliation |
9802|AGRIS 9702|anterior|R97-98PROCE|FINAL9798 |
| 595 ## - COLLECTION |
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| Collection |
CIMMYT Publications Collection |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Drought resistance |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| 9 (RLIN) |
1081 |
| Topical term or geographic name as entry element |
Drought stress |
| Miscellaneous information |
AGROVOC |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Selection |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Tropical zones |
| 653 0# - INDEX TERM--UNCONTROLLED |
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| Uncontrolled term |
CIMMYT |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| 9 (RLIN) |
1314 |
| Topical term or geographic name as entry element |
Zea mays |
| Miscellaneous information |
AGROVOC |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Plant breeding |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1203 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Bolaños, J.A., |
| Relator term |
coaut. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Chapman, S.C., |
| Relator term |
coaut. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Edmeades, G.O.|Banziger, M.|Mickelson, H.R.|Peña-Valdivia, C.B. |
| Relator term |
eds. |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Conference proceedings |