MARC details
| 000 -LEADER |
|---|
| fixed length control field |
03192nab a22004457a 4500 |
| 001 - CONTROL NUMBER |
|---|
| control field |
G448249 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
|---|
| control field |
20240919020944.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
|---|
| fixed length control field |
121211b |||p||p||||||| |z||| | |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER |
|---|
| International Standard Serial Number |
0011-183X |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER |
|---|
| International Standard Serial Number |
1435-0653 (Online) |
| 024 ## - OTHER STANDARD IDENTIFIER |
|---|
| Source of number or code |
https://doi.org/10.2135/cropsci2002.1727 |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloging agency |
MX-TxCIM |
| 041 ## - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
eng |
| 072 #0 - SUBJECT CATEGORY CODE |
|---|
| Subject category code |
F30 |
| 072 #0 - SUBJECT CATEGORY CODE |
|---|
| Subject category code |
U10 |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
|---|
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
CIS-3433 |
| 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 |
| 245 14 - TITLE STATEMENT |
|---|
| Title |
The modified location model for classifying genetic resources : |
| Remainder of title |
II. Unrestricted variance–covariance matrices |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
|---|
| Date of publication, distribution, etc. |
2002. |
| Place of publication, distribution, etc. |
Madison (USA) : |
| Name of publisher, distributor, etc. |
CSSA, |
| 340 ## - PHYSICAL MEDIUM |
|---|
| Material base and configuration |
Printed |
| 500 ## - GENERAL NOTE |
|---|
| General note |
Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0011-183X |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
When evaluating genetic resources and forming core subsets, gene bank accessions are classified into homogeneous and well-separated groups. The modified location model (MLM) is used in the context of a two-stage clustering strategy in which initial groups are first defined using a hierarchical clustering method (such as Ward) and then the MLM is applied to the groups that are formed (Ward-MLM). The MLM allows assuming correlations (between attributes) and variances (of the attributes) among subpopulations (SPs) to be equal (homogeneous, HOM) or different (heterogeneous, HET). The objectives of this study were (i) to compare the effect of assuming homogeneity with the effect of assuming heterogeneity of variance–covariance matrices on the classification of two simulated data sets using the Ward-MLM strategy; and (ii) to make the same type of comparison using data from maize (Zea mays L.) accessions from nine countries. When simulated HOM data were analyzed with the HOM model and the simulated HET data were analyzed with the HET model, some of the original SPs were represented in the resulting clusters but others changed and formed more separated groups. The HET model always formed the most compact and separated clusters, even for HOM data. Classification of 10 real data sets showed that the HET model produced more compact and well-separated groups than the HOM model. However, only the HOM model identified and grouped a small number of observations with very peculiar attributes. Although the HET model may suffice in most situations, the recommended strategy when classifying genetic resources would be to use both models. |
| 536 ## - FUNDING INFORMATION NOTE |
|---|
| Text of note |
Genetic Resources Program |
| 546 ## - LANGUAGE NOTE |
|---|
| Language note |
Text in English |
| 591 ## - CATALOGING NOTES |
|---|
| Affiliation |
0209|Crop Science Society of America (CSSA)|AL-ABC Program|R01JOURN |
| 594 ## - STAFFID |
|---|
| StaffID |
CCJL01 |
| 595 ## - COLLECTION |
|---|
| Collection |
CIMMYT Staff Publications Collection |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Data analysis |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
4371 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Gene banks |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
3525 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Maize |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1173 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Methods |
| 9 (RLIN) |
1178 |
| Source of heading or term |
AGROVOC |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Models |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
4859 |
| 650 17 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Genetic resources |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1127 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Crossa, J. |
| Miscellaneous information |
Genetic Resources Program |
| Field link and sequence number |
CCJL01 |
| 9 (RLIN) |
59 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Taba, S. |
| 9 (RLIN) |
3806 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Eberhart, S. A. |
| 9 (RLIN) |
27868 |
| 773 0# - HOST ITEM ENTRY |
|---|
| Title |
Crop Science |
| Related parts |
v. 42, no. 5, p. 1727-1736 |
| Place, publisher, and date of publication |
Madison (USA) : CSSA, 2002. |
| Record control number |
u444244 |
| International Standard Serial Number |
1435-0653 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Article |
| Source of classification or shelving scheme |
Dewey Decimal Classification |