Yield performance of disease resistant double top cross maize hybrids adapted to the medium altitude ecology of Western Kenya (Record no. 6911)

000 -LEADER
fixed length control field 03098nam a22004577a 4500
001 - CONTROL NUMBER
control field 78598
003 - CONTROL NUMBER IDENTIFIER
control field MX-TxCIM
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20170719154750.0
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 970-648-106-0
040 ## - CATALOGING SOURCE
Original cataloging agency MX-TxCIM
072 #0 - SUBJECT CATEGORY CODE
Subject category code E16
072 #0 - SUBJECT CATEGORY CODE
Subject category code F01
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) CIS-3840
100 1# - MAIN ENTRY--PERSONAL NAME
Personal name Odongo, O.M.
Affiliation Book of abstracts: Arnel R. Hallauer international symposium on plant breeding
110 0# - MAIN ENTRY--CORPORATE NAME
Corporate name or jurisdiction name as entry element Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
111 2# - MAIN ENTRY--MEETING NAME
Meeting name or jurisdiction name as entry element Arnel R. Hallauer International Symposium on Plant Breeding
Location of meeting Mexico, DF (Mexico)
Date of meeting 17-22 Aug 2003
9 (RLIN) 990
245 00 - TITLE STATEMENT
Title Yield performance of disease resistant double top cross maize hybrids adapted to the medium altitude ecology of Western Kenya
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication, distribution, etc. Mexico, DF (Mexico)
Name of publisher, distributor, etc. CIMMYT :
Date of publication, distribution, etc. 2003
300 ## - PHYSICAL DESCRIPTION
Extent p. 98-99
340 ## - PHYSICAL MEDIUM
Material base and configuration Printed
520 ## - SUMMARY, ETC.
Summary, etc. Biotic stresses such as northern leaf blight, caused by Exserohilum turcicum, gray leaf spot (GLS), caused by Cercopspora zea maydis, and maize streak, as well as abiotic stresses like drought and low soil fertility, are the major maize production constraints in the medium altitude moist ecology of western Kenya. Yield losses of 60% due to GLS have been reported in Kenya, although the loss depends on the time of attack. Northern leaf blight can lead to 100% yield loss in susceptible varieties (Odongo 2000). An effective way of combating these stresses is through the use of diverse source germplasm in varietal development, as this helps to pyramid genes for resistance to more than one stress. Ojiem et al. (1996) reported that lack of suitable variety was among the major causes of the gap between farmers' and researchers' maize yields in western Kenya. In this region, seed companies mainly market three-way and double cross hybrids. However, double top cross hybrids are cheaper to produce and are of greater benefit to farmers because they are less sensitive to inbreeding compared to single crosses. There is a need for a breeding strategy to identify single crosses and non-inbred parents with desirable qualities for use in developing double top cross hybrids. The objectives of this study were to: 1) identify high-yielding adapted double top crosses for use in the region; 2) identify heterotic patterns in the parental single crosses to serve as testers in the region; and 3) estimate general combining ability (GCA) of the testers and specific combining ability (SCA) of the single crosses.
546 ## - LANGUAGE NOTE
Language note English
591 ## - CATALOGING NOTES
Affiliation 0311|AGRIS 0301|AL-Maize Program
595 ## - COLLECTION
Collection CIMMYT Staff Publications Collection
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Crossbreeding
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Disease resistance
9 (RLIN) 1077
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Germplasm
9 (RLIN) 1136
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Grain yield
9 (RLIN) 1339
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Kenya
9 (RLIN) 1167
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Maize
9 (RLIN) 1173
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
9 (RLIN) 1314
Topical term or geographic name as entry element Zea mays
Miscellaneous information AGROVOC
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
9 (RLIN) 1952
Topical term or geographic name as entry element Soil fertility
Miscellaneous information AGROVOC
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
9 (RLIN) 1151
Topical term or geographic name as entry element Hybrids
Miscellaneous information AGROVOC
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Ajanga, S.I.,
Relator term coaut.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Diallo, A.O.,
Relator term coaut.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Kirubi, D.T.,
Relator term coaut.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Mburu, C.M.,
Relator term coaut.
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Conference proceedings
Holdings
Withdrawn status Lost status Damaged status Not for loan Collection code Permanent Location Current Location Date acquired Full call number Barcode Date last seen Copy number Price effective from Koha item type
  Not Lost     CIMMYT Staff Publications Collection CIMMYT Knowledge Center: John Woolston Library CIMMYT Knowledge Center: John Woolston Library 2015-02-10 CIS-3840 632535 2015-02-10 1 2015-02-10 Conference proceedings
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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org