MARC details
| 000 -LEADER |
|---|
| fixed length control field |
03543nam a22004457a 4500 |
| 001 - CONTROL NUMBER |
|---|
| control field |
G66280 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
|---|
| control field |
20240919021051.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
|---|
| fixed length control field |
121211s ||||f| 0 p|p||0|| | |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
|---|
| International Standard Book Number |
970-648-001-3 |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloging agency |
MX-TxCIM |
| 072 #0 - SUBJECT CATEGORY CODE |
|---|
| Subject category code |
F30 |
| 072 #0 - SUBJECT CATEGORY CODE |
|---|
| Subject category code |
H20 |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
|---|
| Classification number |
633.1194 |
| Item number |
DUV |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Franco, J. |
| Field link and sequence number |
CFRN01 |
| Miscellaneous information |
Formerly Genetic Resources Program |
| 9 (RLIN) |
494 |
| 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 |
|---|
| Title |
New approach for clustering breeding genotypes using production variables, yield losses, and a double-digit disease scale |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
|---|
| Place of publication, distribution, etc. |
Mexico, DF (Mexico) |
| Name of publisher, distributor, etc. |
CIMMYT|UCL|BADC : |
| Date of publication, distribution, etc. |
1998 |
| 340 ## - PHYSICAL MEDIUM |
|---|
| Material base and configuration |
Printed |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
Spot blotch resistance was scored in an non-replicated set of 198bread wheat entries in Poza Rica, Mexico. A 00-99 double-digit scale (DD) was used which can be considered as two separate discrete variables with different disease level categories (O, 1, . . ., 9). Continuous production variables were also measured: yield (YLD), 1000-grain weight (TGW), growth stage (GS; Zadoks' decimal code), and percent YLD and TGW loss (after comparison with a fungicide-protected plot in the same field). Genotypes were grouped according to three approaches: 1) using only DD data, 2) using only continuous variables GS, YLD, TGW, and percent loss, and 3) using both types of variables. In the first approach, a cluster analysis was conducted using Ward's minimum variance within groups. In the second method, genotypes were clustered based on the normal mixture method sequential to Ward. The third and new approach used the homogeneous conditional Gaussian (modified) method sequential to Ward. Classifications produced with the three methods were compared in order to choose the best strategy for selecting genotypes based on a simultaneous analysis of discrete disease data, yield, yield loss, and growth stage. In contrast to the two other methods, the third approach presented a balanced distribution of genotypes for both types of variables (discrete and continuous), allowing the identification of three groups of entries. 1) a group (G2) with low values for both disease digits, the highest average value for YLD and TGW under disease pressure, and the lowest average YLD and TGW losses; 2) a group (G4) with intermediate disease scores and the highest average YLD and TWG with fungicide protection; and 3) a group (G6) with the highest disease level, the lowest average YLD and TGW under disease pressure, and the highest average YLD and TGW losses. Breeders should carefully consider genotypes classified under G2, as they can be more useful than entries clustering in a group with a lower disease level. |
| 536 ## - FUNDING INFORMATION NOTE |
|---|
| Text of note |
Genetic Resources Program|Research and Partnership Program |
| 546 ## - LANGUAGE NOTE |
|---|
| Language note |
English |
| 591 ## - CATALOGING NOTES |
|---|
| Affiliation |
9806|AGRIS 9802|anterior|R97-98PROCE|FINAL9798 |
| 594 ## - STAFFID |
|---|
| StaffID |
INT1237|CCJL01 |
| 595 ## - COLLECTION |
|---|
| Collection |
CIMMYT Publications Collection |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Disease resistance |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1077 |
| 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 |
Yield factors |
| 653 0# - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
CIMMYT |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Genetic resources |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1127 |
| 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 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| 9 (RLIN) |
1134 |
| Topical term or geographic name as entry element |
Genotypes |
| 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 |
|---|
| Personal name |
Duveiller, E.|Dubin, H.J.|Reeves, J.|McNab, A. |
| Relator term |
eds. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
García A., I., |
| Relator term |
coaut. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| 9 (RLIN) |
826 |
| Personal name |
Duveiller, E. |
| Miscellaneous information |
DG's Office |
| Field link and sequence number |
INT1237 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Crossa, J. |
| Miscellaneous information |
Genetic Resources Program |
| Field link and sequence number |
CCJL01 |
| 9 (RLIN) |
59 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Conference proceedings |