MARC details
| 000 -LEADER |
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| fixed length control field |
03089nam a22004337a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G65839 |
| 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 |
20230704201318.0 |
| 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 |
| 072 #0 - SUBJECT CATEGORY CODE |
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| Subject category code |
P35 |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
633.153 |
| Item number |
EDM |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Lagarda Murrieta, R. |
| 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 |
|---|
| 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 |
Maize landraces: |
| Remainder of title |
Sources of tolerance to low soil nitrogen? |
| 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. |
A total of 209 tropical maize accessions from the CIMMYT germplasm bank were evaluated over the course of three experiments to identify sources of tolerance to N deficiency. We measured grain yield, plant height and maturity under both high and low soil nitrogen. Under low N we also measured N uptake, N harvest index, ear leaf area, and ear leaf chlorophyll concentration. Maturity and season of evaluation had large effects, so results were analyzed separately for early and late landraces in winter and summer experiments. Landraces could be grouped using cluster analysis. Accessions from certain locations tended to have similar maturities. Some Cuban accessions were characterized by superior performance under low N. We identified 54 accessions with high total N recovery, harvest index, and grain %N, from various regions. These were grouped by maturity and intercrossed to form early and late source populations. After three cycles of intercrossing as half-sibs in a low-N nursery with very slight selection pressure for ear formation and reduced plant height, the populations underwent three additional cycles of improvement with 20-50% selection pressure for yield and plant type under low N. 171 two evaluations where N stress reduced mean yields to 1.05 t ha-1, yields of C6 of the source populations were not significantly less than the yields of improved check varieties. Yield of the early population increased by 15% per cycle between C4 and C6, and that increase was 11% per cycle in the late population. With continued improvement, these source populations may provide valuable traits for low N environments. |
| 536 ## - FUNDING INFORMATION NOTE |
|---|
| Text of note |
Research and Partnership Program |
| 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 |
| 594 ## - STAFFID |
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| StaffID |
INT1888 |
| 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 |
Nitrogen content |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Nutrient uptake |
| 9 (RLIN) |
1191 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Selection |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Varieties |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1303 |
| 653 0# - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
CIMMYT |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| 9 (RLIN) |
1314 |
| Topical term or geographic name as entry element |
Zea mays |
| Miscellaneous information |
AGROVOC |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| 9 (RLIN) |
1952 |
| Topical term or geographic name as entry element |
Soil fertility |
| Miscellaneous information |
AGROVOC |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| 9 (RLIN) |
1134 |
| Topical term or geographic name as entry element |
Genotypes |
| Miscellaneous information |
AGROVOC |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Edmeades, G.O., |
| 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. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Banziger, M. |
| Miscellaneous information |
Research & Partnership Program |
| -- |
Excellence in Breeding |
| Field link and sequence number |
INT1888 |
| 9 (RLIN) |
834 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Conference proceedings |