Crop Science Grow Your Career with CSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Crop Sci 39:1315-1324 (1999)
© 1999 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Figures Only
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via ISI Web of Science (29)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Chapman, S.C.
Right arrow Articles by Edmeades, G.O.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Chapman, S.C.
Right arrow Articles by Edmeades, G.O.
Agricola
Right arrow Articles by Chapman, S.C.
Right arrow Articles by Edmeades, G.O.
Crop Science 39:1315-1324 (1999)
© 1999 Crop Science Society of America

CROP BREEDING, GENETICS & CYTOLOGY

Selection Improves Drought Tolerance in Tropical Maize Populations

II. Direct and Correlated Responses among Secondary Traits

S.C. Chapmana and G.O. Edmeadesb

a CSIRO Tropical Agriculture, 306 Carmody Rd., St. Lucia, QLD 4067, Australia
b Pioneer Hi-Bred International, Inc., 7431 Kaumualii Highway, P.O. Box 596 Kekaha, HI 96752 USA

edmeadgreg{at}phibred.com

Recurrent selection for drought tolerance for three to eight cycles has increased grain yield (GY) under drought at flowering by 30 to 50% in three lowland tropical maize (Zea mays L.) populations. The relationships among secondary traits as a result of this selection have not been determined, however. The objectives of this study were to measure direct and correlated changes due to selection in secondary traits by evaluating cycles of selection and appropriate check entries at five water-stressed (mean yield 2.35, range 1.01–4.48 Mg ha-1) and five well-watered environments (mean yield 7.96, range 5.81–10.40 Mg ha-1). Under drought, changes per cycle with recurrent S1 selection (P < 0.05) were as follows: GY 12.6%, fertile ears per plant (EPP) 8.9%, grains per fertile ear (GPE) 6.3%, grain number per square meter 12.2%, 1000 grain weight no change, anthesis-silking interval (ASI) -22.0%, days from sowing to 50% anthesis -0.7%, plant height -2.0%, primary tassel branch number -5.9%, and senesced leaf area 2.7%. Responses under well-watered conditions were smaller but generally of the same sign. Grain yield was strongly associated with grain number per square meter in both water-stressed and well-watered environments . Grain yield, EPP, and GPE were strongly correlated with ASI across entries under drought , though not when water was plentiful. The use of managed stress environments that consistently reveal genetic variation for these traits at specific times during crop development is endorsed for selection purposes.

Abbreviations: AD, days from sowing to 50% anthesis • ASI, anthesis-silking interval • EPP, fertile ear number per plant • GPE, grain number per fertile ear • GNA, grain number per square meter • GW1000, 1000 grain weight • GY, grain yield • TBN, tassel primary branch number • WW, well watered




This article has been cited by other articles:


Home page
 Proc. Natl. Acad. Sci. USAHome page
D. E. Nelson, P. P. Repetti, T. R. Adams, R. A. Creelman, J. Wu, D. C. Warner, D. C. Anstrom, R. J. Bensen, P. P. Castiglioni, M. G. Donnarummo, et al.
Plant nuclear factor Y (NF-Y) B subunits confer drought tolerance and lead to improved corn yields on water-limited acres
PNAS, October 16, 2007; 104(42): 16450 - 16455.
[Abstract] [Full Text] [PDF]

Home page
 GeneticsHome page
M. Gonzalo, T. J. Vyn, J. B. Holland, and L. M. McIntyre
Mapping Density Response in Maize: A Direct Approach for Testing Genotype and Treatment Interactions
Genetics, May 1, 2006; 173(1): 331 - 348.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
P. Monneveux, C. Sanchez, D. Beck, and G. O. Edmeades
Drought Tolerance Improvement in Tropical Maize Source Populations: Evidence of Progress
Crop Sci., December 2, 2005; 46(1): 180 - 191.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
R. C. Babu, B. D. Nguyen, V. Chamarerk, P. Shanmugasundaram, P. Chezhian, P. Jeyaprakash, S. K. Ganesh, A. Palchamy, S. Sadasivam, S. Sarkarung, et al.
Genetic Analysis of Drought Resistance in Rice by Molecular Markers: Association between Secondary Traits and Field Performance
Crop Sci., July 1, 2003; 43(4): 1457 - 1469.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
R. TUBEROSA, S. SALVI, M. C. SANGUINETI, P. LANDI, M. MACCAFERRI, and S. CONTI
Mapping QTLs Regulating Morpho-physiological Traits and Yield: Case Studies, Shortcomings and Perspectives in Drought-stressed Maize
Ann. Bot., June 15, 2002; 89(7): 941 - 963.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
W. B. Bruce, G. O. Edmeades, and T. C. Barker
Molecular and physiological approaches to maize improvement for drought tolerance
J. Exp. Bot., January 1, 2002; 53(366): 13 - 25.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
G.O. Edmeades, J. Bolaños, S.C. Chapman, H.R. Lafitte, and M. Bänziger
Selection Improves Drought Tolerance in Tropical Maize Populations: I. Gains in Biomass, Grain Yield, and Harvest Index
Crop Sci., September 1, 1999; 39(5): 1306 - 1315.
[Abstract] [Full Text]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Plant Registrations Soil Science Society of America Journal
Journal of Natural Resources
and Life Sciences Education		 Journal of
Environmental Quality
Copyright © 1999 by the Crop Science Society of America.