The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize (Record no. 6304)

000 -LEADER
fixed length control field 04110nam a22004577a 4500
001 - CONTROL NUMBER
control field 67918
003 - CONTROL NUMBER IDENTIFIER
control field MX-TxCIM
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20171220150948.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 121211s ||||f| 0 p|p||0|| |
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 F62
072 #0 - SUBJECT CATEGORY CODE
Subject category code H50
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) CIS-3382
100 1# - MAIN ENTRY--PERSONAL NAME
Personal name Bolaños, J.A.
Affiliation Asian Regional Maize Workshop, 7: Strengthening hybrid maize technology and public-private partnership to accelerate maize production in the Asian region
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 7, Proceedings of the Asian Regional Maize Workshop
Location of meeting Los Baños (Philippines)
Date of meeting 23-27 Feb 1998
245 00 - TITLE STATEMENT
Title The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication, distribution, etc. Los Baños, Laguna (Philippines)
Name of publisher, distributor, etc. PCARRD :
Date of publication, distribution, etc. 2000
300 ## - PHYSICAL DESCRIPTION
Extent 19 pages
340 ## - PHYSICAL MEDIUM
Material base and configuration Printed
520 ## - SUMMARY, ETC.
Summary, etc. Selection for improved performance under drought based on grain yield alone has often been considered inefficient, but the use of secondary traits of adaptive value whose genetic variability increases under drought can increase selection efficiency. In the course of recurrent selection for drought tolerance in six tropical maize (Zea mays L.) populations, a total of 3509 inbred progenies (SI to S3 level) were evaluated in 50 separate yield trials under two or three water regimes during the dry winter seasons of 1986-90 at Tlaltizapan, Mexico. In over 90% of the trials, ears planrl, kernels planr, weight kernel-l, anthesis-silking interval (ASI), tassel branch number and visual scores for leaf angle, leaf rolling and leaf senescence were deteimined. Low scores indicated erect, unrolled or green leaves. Canopy temperature, leaf chlorophyll concentration and stern-leaf-extension rate were measured in 20-50% of the trials. Across all trials, linear phenotypic correlations (P<0.01) between grain yield under drought and these traits, in order listed, were 0.77,0.90,0.46, -0.53, -0.16, 0.06Ns, -0.18, -0.11, -0.27, 0.17 and 0.10. Genetic correlations were generally similar in size and sign. None of physiological or morphological traits indicative of improved water status correlated with grain yield under drought, although some had relatively high heritabilities. Genetic variances for grain yield, kernels ear-l, kernels planr and weight kernerl decreased with increasing drought, but those for ASI and ears planr increased. Broad-sense heritability for grain yield averaged around 0.6, but fell to values near 0.4 at very low grain yield levels. Genetic correlations between grain yield and ASI or ears plant-1 were weak under well-watered conditions, but approached -0.6 and 0.9, respectively, under severe moisture stress. These results show that secondary traits are not lacking genetic variability within elite maize populations. Their low correlation with grain yield may indicate that variation in grain yield under moisture stress is dominated by variation in ear-setting processes related to biomass partitioning at flowering, and much less by factors putatively linked to crop water status. Field-based selection programs for drought tolerance should consider these results. Keywords: Drought tolerance; Genetic correlation; Heritability; Secondary traits; Zea mays Abbreviations: ASI, anthesis-silking interval; CIMMYT, International Maize and Wheat Improvement Center, IS, intermediate stress; SS, severe stress;. WW, well-watered.
546 ## - LANGUAGE NOTE
Language note English
591 ## - CATALOGING NOTES
Affiliation 0208|AGRIS 0201|AL-Maize Program|R01PROCE
595 ## - COLLECTION
Collection CIMMYT Staff Publications Collection
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Drought resistance
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Flowering
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
Topical term or geographic name as entry element Plant developmental stages
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Selection
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Tropical zones
653 0# - INDEX TERM--UNCONTROLLED
Uncontrolled term CIMMYT
653 0# - INDEX TERM--UNCONTROLLED
Uncontrolled term Tropical maize
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) 1130
Topical term or geographic name as entry element Genetics
Miscellaneous information AGROVOC
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
9 (RLIN) 1203
Topical term or geographic name as entry element Plant breeding
Miscellaneous information AGROVOC
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Edmeades, G.O.,
Relator term coaut.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Vasal, S.K.|Gonzalez Ceniceros, F.|XiongMing, F.
Relator term eds.
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-3382 631349 2015-02-10 1 2015-02-10 Conference proceedings
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Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org