MARC details
| 000 -LEADER |
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| fixed length control field |
03553nam a22003257a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
G96018 |
| 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 |
20220104230315.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
121211s ||||f| 0 p|p||0|| | |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
MX-TxCIM |
| 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-6595 |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Gakunga, J. |
| Affiliation |
From Soil to Soul: Crop Production for Improved African Livelihoods and a Better Environment for Future Generations; Programme and Abstracts of Papers. African Crop Science Society Conference, 10; Maputo (Mozambique); 10-13 Oct 2011. |
| 9 (RLIN) |
2101 |
| 245 00 - TITLE STATEMENT |
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| Title |
Combining ability of Chilo partellus resistant maize inbred lines for mid-altitude environment of Kenya |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
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| Name of publisher, distributor, etc. |
African Crop Science Society : |
| Date of publication, distribution, etc. |
2011 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
p. 293-294 |
| 500 ## - GENERAL NOTE |
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| General note |
Abstract only |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Maize (Zea mays L.) is an important staple food crop in the developing world. The spotted stem borer, Chilo partellus Swinhoe causes significant maize yield losses in the mid-altitude ecology of Kenya. Host plant resistance is a preferred option to reduce yield losses. Knowledge of gene action conditioning resistance is key in breeding for insect resistance. The objectives of this research were to determine the level of resistance of 45 maize hybrids to C. partellus, agronomic performance of the hybrids in the target ecology, general and specific combining ability and the heterotic groupings of the inbred lines. Ten maize inbred lines were crossed in a diallel scheme to generate 45 single cross hybrids, which were evaluated using alpha lattice design in four sites for two rainfall seasons in 2009 and 2010. Ten plants in every plot were infested with five C. partellus neonates while the rest were protected using beta cyfluthrin (Bulldock). Data were recorded on grain yield, leaf damage, and number of exit holes, tunnel length, and ratio of tunnel length to plant height, and Analysis of Variance conducted using GLM procedure of SAS. Results showed variability (P<0.001) among the lines for resistance to the pest, grain yield and agronomic performance. Additive gene effects were more important than non-additive gene effects for grain yield and leaf damage, number of exit holes, tunnel length and tunnel length-plant height ratio, while genotype x parameter interactions were observed among traits. Parents 1 and 2 showed good GCA for grain yield, 3 and 4 had good GCA for leaf damage, exit holes, tunnel length and tunnel length-plant height ratio, while parent 9 showed good performance for both. Parents 1, 2, 3, 5, 8 and 10 were classified into heterotic group B, parent 6 into group A and parents 4, 7 and 9 into heterotic group AB. There was no variability in reaction to gray leaf spot, Exserohilum turcicum, rust and maize streak virus among the hybrids. It would be possible to develop viable F1 hybrids resistant to C. partellus and with desirable agronomic traits. Breeding for resistance to C. partellus should adopt a recurrent selection method to utilize the additive nature of gene effects. Inbred lines 1, 2 and 9 would be useful breeding stock for further breeding work. Potential for use of molecular markers in identification of QTLs associated with resistance should be explored. |
| 536 ## - FUNDING INFORMATION NOTE |
|---|
| Text of note |
Global Maize Program |
| 546 ## - LANGUAGE NOTE |
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| Language note |
English |
| 594 ## - STAFFID |
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| StaffID |
INT2460 |
| 595 ## - COLLECTION |
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| Collection |
CIMMYT Staff Publications Collection |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
Combining ability |
| 9 (RLIN) |
2367 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Gene action |
| 9 (RLIN) |
1124 |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Resistance |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Njoroge, K., |
| Relator term |
coaut. |
| 9 (RLIN) |
230 |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Olubayo, F., |
| Relator term |
coaut. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Mugo, S.N. |
| Miscellaneous information |
Formerly Global Maize Program |
| Field link and sequence number |
INT2460 |
| 9 (RLIN) |
840 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Conference proceedings |