MARC details
| 000 -LEADER |
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| fixed length control field |
03522nam a22004337a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G66400 |
| 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 |
20240919021051.0 |
| 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 |
968-6923-94-2 |
| 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 |
H20 |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
632.4 |
| Item number |
DUB |
| 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) |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Singh, R.P. |
| Miscellaneous information |
Global Wheat Program |
| Field link and sequence number |
INT0610 |
| 9 (RLIN) |
825 |
| 245 00 - TITLE STATEMENT |
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| Title |
Breeding strategies for introgressing diverse scab resistances into adapted wheats |
| 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. |
Scab of wheat, caused by Fusarium spp., is a major constraint in the humid and semi- humid wheat production areas of many countries. The progress in breeding resistant cultivars at CIMMYT and elsewhere has been slow because most known resistances occur in unadapted germplasm, and the resistances are usually quantitative and based on the additive interactions of a few to several minor genes. Three breeding strategies which may enhance the introgression and accumulation of minor genes into adapted wheats are proposed. In the first scheme, the F1 hybrids are developed by crossing two diverse, scab resistant wheats, eg., Ning 7840 from China and Frontana from Brazil. The F1 hybrids are then top-crossed (three-way) with a third parent which is adapted to the target area but may lack adequate scab resistance. A large (between 1000-2000 plants) top-cross population is required to obtain sufficient plants with all four or five minor genes in a heterozygous condition. We propose to either apply only mild selection pressure, or no selection pressure, for scab resistance in early segregating generations (such as F1-top, F2, and F3). However, in the meantime, strong selection pressure must be applied in these early generations for desirable agronomic attributes and resistance to other diseases such as rusts. The selected plants could be maintained as bulk and a large population size should be maintained in each generation. Intense selection pressure for scab resistance should be applied in the later (F4 and F5) generations, when the level of homozygosity is higher, in order to identify a few transgressive segregants having good agronomic type and four to five genes combined for fusarium resistance. A large number of selected F5 plants could be harvested in a pedigree fashion to achieve pure F6 lines, which could be further assessed for resistance to fusarium. The two alternative strategies, which will reduce the population size in segregating generations, will require breeding in two steps: first, parent building; and second, transferring resistance into adapted wheats. The proposed strategies should result in the introgression of additive minor genes in an adapted background. |
| 536 ## - FUNDING INFORMATION NOTE |
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| Text of note |
Global Wheat Program |
| 546 ## - LANGUAGE NOTE |
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| Language note |
English |
| 591 ## - CATALOGING NOTES |
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| Affiliation |
R97-98PROCE|9806|AGRIS 9802|anterior|R98PROCE|FINAL9798 |
| 594 ## - STAFFID |
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| StaffID |
INT0610 |
| 595 ## - COLLECTION |
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| Collection |
CIMMYT Publications Collection |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Disease resistance |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1077 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Fusarium |
| 9 (RLIN) |
2705 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Hybridization |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Introgression |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Plant diseases |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1206 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Plant production |
| 9 (RLIN) |
1212 |
| 653 0# - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
CIMMYT |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Triticum |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1295 |
| 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 |
|---|
| Personal name |
Dubin, H.J.|Gilchrist, L.|Reeves, J.|McNab, A. |
| Relator term |
eds. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| 9 (RLIN) |
97 |
| Personal name |
Ginkel, M. Van |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Conference proceedings |