HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Abedon, B. G. Articles by Tracy, W. F. Search for Related Content PubMed Articles by Abedon, B. G. Articles by Tracy, W. F. Agricola Articles by Abedon, B. G. Articles by Tracy, W. F.

Developmental Changes Associated with Divergent Selection for Rind Penetrometer Resistance in the MoSCSSS Maize Synthetic

Dep. of Biology, Rhodes College, 2000 North Parkway, Memphis, TN 38112, India
USDA-ARS Plant Genetics Research Unit, Univ. of Missouri-Columbia, Columbia, MO 65211
Dep. of Agronomy, 1575 Linden Dr., Univ. of Wisconsin-Madison, Madison, WI 53706

^* Corresponding author (wftracy{at}facstaff.wisc.edu).

Rind penetrometer resistance (RPR) has been used to select indirectly for stalk lodging resistance in maize (Zea mays L.). Breeding for stalk lodging resistance would be facilitated by a better understanding of developmental mechanisms affecting RPR. Vegetative development can be divided into juvenile-vegetative and adult-vegetative phases. Vegetative phase change occurs when juvenile-vegetative traits are replaced by adult-vegetative traits. The objective of this study was to determine indirect responses in the timing of vegetative phase change and other developmental traits in nine cycles of S₀ phenotypic divergent selection for RPR in Missouri Second Cycle Stiff Stalk Synthetic (MoSCSSS). In the high direction of selection, vegetative phase change occurred at lower nodes while ear leaf number and total leaf number decreased. In the low direction of selection, vegetative phase change was delayed to higher nodes while ear leaf number and total leaf number increased. In both directions of selection, plant height was reduced and flowering occurred earlier. The timing of vegetative phase change may be a factor in determining the level of RPR and stalk lodging resistance. Alternatively, modifiers may exist in MoSCSSS that coordinately regulate vegetative phase change with traits, such as ear leaf number, that are directly affected by selection for RPR.

Received for publication January 21, 1998.

This article has been cited by other articles:

				C. F. Basso, M. M. Hurkman, E. S. Riedeman, and W. F. Tracy Divergent Selection for Vegetative Phase Change in Maize and Indirect Effects on Response to Puccinia sorghi Crop Sci., May 1, 2008; 48(3): 992 - 999. [Abstract] [Full Text] [PDF]

				M. A. Glover, D. B. Willmot, L. L. Darrah, B. E. Hibbard, and X. Zhu Diallel Analyses of Agronomic Traits Using Chinese and U.S. Maize Germplasm Crop Sci., May 6, 2005; 45(3): 1096 - 1102. [Abstract] [Full Text] [PDF]

				S. A. Flint-Garcia, C. Jampatong, L. L. Darrah, and M. D. McMullen Quantitative Trait Locus Analysis of Stalk Strength in Four Maize Populations Crop Sci., January 1, 2003; 43(1): 13 - 22. [Abstract] [Full Text] [PDF]

				P. Revilla, R. A. Malvar, A. Butron, W. F. Tracy, B. G. Abedon, and A. Ordas Response to Selection for the Timing of Vegetative Phase Transition in a Maize Population Crop Sci., September 1, 2002; 42(5): 1471 - 1474. [Abstract] [Full Text] [PDF]