MARC details
| 000 -LEADER |
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| fixed length control field |
03105nab a22003137a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G82964 |
| 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 |
20220526153018.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
121211s1992 it |||p op||| | | eng d |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER |
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| International Standard Serial Number |
2279-8013 |
| 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 |
| 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-4616 |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Vasal, S.K. |
| 9 (RLIN) |
5280 |
| 245 10 - TITLE STATEMENT |
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| Title |
Heterotic patterns of eighty-eight white subtropical CIMMYT maize lines |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
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| Place of publication, distribution, etc. |
Bergamo (Italy) : |
| Name of publisher, distributor, etc. |
Istituto Sperimentale per la Cerealicoltura, |
| Date of publication, distribution, etc. |
1992. |
| 500 ## - GENERAL NOTE |
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| General note |
Peer review |
| 500 ## - GENERAL NOTE |
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| General note |
Open Access |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Hybrid-oriented source germplasm with established heterotic pattern is essential for initiating hybrid development. The objective of this study is to identify and form heterotic groups of maize (Zea mays L.) with subtropical adaptation. Eighty-eight inbred maize lines derived from six CIMMYT subtropical maize populations and pools were crossed to four tester lines, one each from Pool 32 and Populations 34, 42 and 44. The 352 line x tester hybrid combinations were divided into four sets, each set comprising of crosses of 22 lines with the four testers, and evaluated during two seasons at Taltizapan, Mexico during 1989 and 1990. Mean grain yields for the four sets ranged from 9.0 t/ha (set 1) to 8.2 t/ha (set4). General combining abiliti (GCA) and specific combining ability (SCA) for grain yield were calculated by line x tester analysis. Of the 88 lines tested, 14 from Population 44, 11 from Population 42, nine from Pool 32 and one from Population 34 had positive GCA effects for grain yield. Among testers, Tester 2 (Pop. 44) showed positive GCA effects for yield, and Tester 1 (Pool 32) had negative GCA effects for yield. Significant differences were observed for SCA effects for yield in the different line x tester crosses. Several combinations were identified having yields of 10 t/ha or more and possessing high SCA effects. Interpopulation corres generally outyielded and had greater SCA effects as compared with intrapopulation corsses. Superior intrapopulation combinations, however, were observed among crosses involving lines from Population 44. Two heterotic groups STHG "A" and STHG "B" are being formed from these materials using the testcross data. Several of the lines included in this study were announced as CIMMYT maize lines (CML) during 1991 and are made available to our cooperators worlwide. Twelve of the 20 top-yielding single crosses (five from each set) were between CML lines. The matieral and information generated from this study may be useful for future hybrid development work at CIMMYT and in other public and private beeding programs, particularly in the developing world. |
| 546 ## - LANGUAGE NOTE |
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| Language note |
Text in English |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Zea mays |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1314 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Germplasm |
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1136 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Combining ability |
| 9 (RLIN) |
2367 |
| Source of heading or term |
AGROVOC |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Srinivasan, G. |
| 9 (RLIN) |
6538 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Han, G.C. |
| 9 (RLIN) |
27600 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Gonzalez C., F. |
| 9 (RLIN) |
27601 |
| 773 0# - HOST ITEM ENTRY |
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| Title |
Maydica |
| Related parts |
v. 37, p. 319-327 |
| Record control number |
u444598 |
| Place, publisher, and date of publication |
Bergamo (Italy) : Istituto Sperimentale per la Cerealicoltura, 1992. |
| International Standard Serial Number |
2279-8013 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Koha item type |
Article |
| Source of classification or shelving scheme |
Dewey Decimal Classification |