MARC details
| 000 -LEADER |
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| fixed length control field |
03821nam a22004937a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G80726 |
| 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 |
20211006084755.0 |
| 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 |
970-648-120-6 |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
MX-TxCIM |
| 072 #0 - SUBJECT CATEGORY CODE |
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| Subject category code |
F01 |
| 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 |
338.16 |
| Item number |
FRI |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Gudu, S. |
| Affiliation |
Integrated Approaches to Higher Maize Productivity in the New Millennium |
| 110 0# - 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) Kenya |
| 111 2# - MAIN ENTRY--MEETING NAME |
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| Meeting name or jurisdiction name as entry element |
7. Proceedings of the Eastern and Southern Africa Regional Maize Conference |
| Location of meeting |
Nairobi (Kenya) |
| Date of meeting |
5-11 Feb 2002 |
| 245 00 - TITLE STATEMENT |
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| Title |
Screening of kenyan maize germplasm for tolerance to low pH and aluminium for use in acid soils of Kenya |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
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| Place of publication, distribution, etc. |
Nairobi (Kenya) |
| Name of publisher, distributor, etc. |
KARI|CIMMYT : |
| Date of publication, distribution, etc. |
2002 |
| 300 ## - PHYSICAL DESCRIPTION |
|---|
| Extent |
p. 216-221 |
| 340 ## - PHYSICAL MEDIUM |
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| Material base and configuration |
Printed |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Low soil pH is a major constraint to maize (Zea mays L.) production on tropical soils due to toxic levels of aluminium (Al) and the concomitant phosphorus (P) deficiency that hinders plant root growth. A preliminary laboratory screening was conducted to test 75 Kenyan landrace maize accessions and J 2 commercial varieties for response to low soil pH and Al toxicity in solution culture. The landrace maize accessions were screened under different levels of Al concentration (0, 100, 200, and 300 mM) at pH 4.0. A standard acid-tolerant variety (CIMCALI 97 Balopia SA4 subsequently referred to as 97BASA4) and an Al-sensitive variety (CIMCALI 97BSA3-1) from CIMMYT were included as controls. Preliminary classification of the 75 randomly chosen landrace accessions into tolerant/sensitive phenotypic classes was based on the FRL, Rti and haematoxylin staining of seedling grown in a solution culture containing 200 mM Al at pH 4.0, but the final screening of commercial hybrids/synthetics/composites was done in similar medium at 220 mM Al. The most consistently tolerant accessions based on FRL and Rti were, 1X1 , 5A, 203B, and 4D, and the most consistently sensitve accessions were 306A, 306B and 7B2, while the rest of landrace accessions had intermediate tolerance or sensitivity when compared with 97BASA4 and 97BSA3-1. Interesting observations were made when four selected tolerant landrace accessions (203B, SA, 4D and 1X1) and two susceptible accessions (306A and 306B) were tested against 13 commercial hybrids, synthetics and composites at 220 mM Al. The most tolerant commercial varieties were DH02 and HS13 while the most sensitive were H623 and H62S and the rest were of intermediate tolerance or sensitivity. It is interesting to note that some of tl1e commercial varieties and landrace accessions were sensitive to Al concentrations as low as 140 mM typically found in some high potential maize producing areas of Kenya indicating that Al toxicity could be one of the major causes for the low maize yields in acid soils of Kenya. Secondly, there is high variability in tolerance to Al toxicity among Kenyan commercial varieties and landrace maize populations that may be useful in selection for A1-tolerant materials for use in acid soils in Kenya.. |
| 546 ## - LANGUAGE NOTE |
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| Language note |
English |
| 591 ## - CATALOGING NOTES |
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| Affiliation |
0410|AGRIS 0401|AL-Maize Program |
| 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 |
Acid soils |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Crop husbandry |
| 9 (RLIN) |
1058 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Germplasm |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1136 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Kenya |
| 9 (RLIN) |
1167 |
| 650 17 - 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 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Seed production |
| 9 (RLIN) |
1253 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Tropical soils |
| 653 0# - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
CIMMYT |
| 653 0# - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
KARI |
| 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) |
1151 |
| Topical term or geographic name as entry element |
Hybrids |
| Miscellaneous information |
AGROVOC |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Friesen, D.K.|Palmer, A.F.E. |
| Relator term |
eds. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Ligeyo, D.O., |
| Relator term |
coaut. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Maina, S.M., |
| Relator term |
coaut. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Ombakho, G., |
| Relator term |
coaut. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Onkware, A.O., |
| Relator term |
coaut. |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Koha item type |
Book |