MARC details
| 000 -LEADER |
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| fixed length control field |
04920nam a22004577a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G76617 |
| 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 |
20240919021100.0 |
| 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 |
9974-7586-2-9 |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
MX-TxCIM |
| 041 ## - LANGUAGE CODE |
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| Language code of text/sound track or separate title |
eng |
| 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 |
F30 |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
CIS-3690 |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
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| 9 (RLIN) |
341 |
| Personal name |
Trethowan, R.M. |
| 245 10 - TITLE STATEMENT |
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| Title |
Avances en el mejoramiento de trigos tolerantes a la brotación de la espiga |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
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| Place of publication, distribution, etc. |
La Estanzuela (Uruguay) : |
| Name of publisher, distributor, etc. |
CIMMYT, |
| -- |
INIA, |
| Date of publication, distribution, etc. |
2001. |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
8 pages |
| 340 ## - PHYSICAL MEDIUM |
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| Material base and configuration |
Printed |
| 500 ## - GENERAL NOTE |
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| General note |
Abstract available in English |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Las lluvias antes de la cosecha pueden provocar que el grano de trigo brote en la espiga, reduciendo el rendimiento y el peso específico y afectando de manera negativa la calidad de molienda y panificación. Los mejoradores que trabajan en zonas propensas a la brotación del grano antes de la cosecha, suelen seleccionar trigo de grano rojo dada la relación que existe entre el color rojo y el estado latente del grano, el pri~ipal mecanismo de tolerancia a este factor adverso. Datos provenientes de Canadá indican que los mejoradores han acumulado genes aditivos que confieren dormancia a los materiales genéticos de grano rojo ya tolerantes, como RL4137 y Columbus, que dieron origen a la variedad Domain AC y la línea mejorada BW259. Entre los trigos de grano blanco, la línea AUS1408 en la que la dormancia es controlada por dos genes recesivos, sigue siendo la mejor fuente de tolerancia para este carácter. La selección a campo para tolerancia a la brotación es difícil, en virtud de la variabilidad de precipitación en la mayoría de los ambientes. El uso de simuladores de lluvia con los que las espigas de trigo son rociadas a temperatura y humedad controladas ha demostrado ser eficaz, aunque es costoso y requiere mucho tiempo. El desarrollo de marcadores moleculares para la dormancia será de gran utilidad en la selección de tolerancia a brotación de espiga. En investigaciones realizadas en Australia se ha identificado un marcador microsatélite estrechamente vinculado con el locus de sensibilidad al ácido absicico, ABA, en el cromosoma 3D. Además, se han identificado loci determinantes de caracteres cuantitativos, QTL relacionados con susceptibilidad extrema a la brotación de la espiga en los cromosomas 2A, 20 Y 4A. |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Rainfall prior to harvest can cause wheat grain to germinate in the spike thereby reducing yield, lowering test weight and adversely effecting milling and baking quality. Breeders working in areas prone to pre-harvest sprouting damage, generally select red-grained wheat because ofthe association between red-grain color and grain dormancy; the primary mechanism of tolerance to pre-harvest sprouting. Evidence from Ganada suggests that breeders have accumulated additive genes for dormancy in already tolerant red-grained backgrounds su eh as RL4137 and Golumbus, resulting in the cultivar AG oomain and the breeding fine BW259. Among white-grained wheats, the line AUS140B in which dormancy is controlled by two recessive genes remains the best source material. Screening for pre-harvest sprouting toleran ce in the field is difficult because of rain fall variabi/ity in most environments. The use of rain simulators in which wheat spikes are misted under controlled temperature and humidity has proved effective, although expensive and time consuming. oevelopment of molecular markers for dormancy will greatly assist selection for pre-harvest sprouting tolerance. Work in Australia has identified a microsatellite marker closely linked to the ABA sensitivity locus on chromosome 3D. In addition, quantitative trait loei, QTLs, linked with extreme susceptibility to sprouting, have been identified located on chromosomes 2A, 20 and 4A. A highly significant QTL for late maturity alpha-amylase (LMA) , expressed in the absence ofrain fall and found in many breeding programs around the world, has also been identified at Sydney University. Reliable LMA induction methods have been developed. |
| 546 ## - LANGUAGE NOTE |
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| Language note |
Text in Spanish |
| 591 ## - CATALOGING NOTES |
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| Affiliation |
0307|AGRIS 0301|AL-Economics Program |
| 595 ## - COLLECTION |
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| Collection |
CIMMYT Staff Publications Collection |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Baking |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
9922 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Environmental factors |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
4558 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Germination |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
4740 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Humidity |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
10429 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Milling |
| 9 (RLIN) |
1180 |
| Source of heading or term |
AGROVOC |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Preharvest treatment |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
16818 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Quality |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1231 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Rainfed farming |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
9381 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Temperature |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
7940 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Wheat |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1310 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| 9 (RLIN) |
1313 |
| Topical term or geographic name as entry element |
Yields |
| Source of heading or term |
AGROVOC |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Plant breeding |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1203 |
| 773 ## - HOST ITEM ENTRY |
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| Place, publisher, and date of publication |
La Estanzuela (Uruguay) : CIMMYT, INIA, 2003. |
| Related parts |
p. 197-204 |
| Title |
Estrategias y metodologías utilizadas en el mejoramiento de trigo : un enfoque multidisciplinario |
| Record control number |
G76539 |
| International Standard Book Number |
9974-7586-2-9 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Koha item type |
Book part |
| Source of classification or shelving scheme |
Dewey Decimal Classification |