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 Robinson, S. L. Articles by Wilcox, J. R. Search for Related Content PubMed Articles by Robinson, S. L. Articles by Wilcox, J. R. Agricola Articles by Robinson, S. L. Articles by Wilcox, J. R.

Comparison of Determinate and Indeterminate Soybean Near-Isolines and Their Response to Row Spacing and Planting Date

FFR Cooperative, 4112 E. State Rd. 225, West Lafayette, IN 17906
USDA-ARS, Crop Production and Pest Control Res. and Dep. of Agronomy, Purdue Univ., West Lafayette, IN 17907-1150

^* Corresponding author (jwilcox{at}purdue.edu).

Determinate (DET) and indeterminate (IND) soybeans [Glycine max (L.) Merr.] differ in growth habit and have responded differently to planting date and row spacing. The purpose of this study was to compare DET and IND near-isolines for phenoiogical and agronomic traits and to determine similarity of response of the isolines to planting date and row width. Thirty-eight F₅-derived DET and IND near-isolines were randomly selected from six soybean populations. The lines were evaluated in three replications of a split (planting date), split (row spacing), split (isoline) plot design over a 2-yr period. Data were recorded on the days to first flowering, days to maturity, length of the reproductive period, and on plant height, lodging, and seed yield. Lines within growth habits responded similarly to row spacing, but the interactions of planting dates with lines within growth habits were significant for all traits measured. The DET lines were very similar to their IND isoline counterparts for phenological traits measured at two planting dates (r = 0.84** and 0.90**), less similar for plant height (r = 0.71**), and even less similar for plant lodging (r = 0.53** and 0.64**). There was no association between DET and IND isolines for seed yield at the early planting date and a weak association at the late planting date. This suggests that the two plant types responded differently to environmental factors that affect seed yield. However, the highest yielding DET and IND isolines averaged over both years, planting dates, and row spacings were derived from the same F₅ plant, providing evidence that loci affecting superior seed yield could be expressed in either plant type.

Received for publication February 2, 1998.

This article has been cited by other articles:

				J. J. Heitholt, J. B. Farr, and R. Eason Planting Configuration x Cultivar Effects on Soybean Production in Low-Yield Environments Crop Sci., August 1, 2005; 45(5): 1800 - 1808. [Abstract] [Full Text] [PDF]

				A. M. Ismail and A. E. Hall Semidwarf and Standard-Height Cowpea Responses to Row Spacing in Different Environments Crop Sci., November 1, 2000; 40(6): 1618 - 1623. [Abstract] [Full Text] [PDF]

				L. Kilgore-Norquest and C.H. Sneller Effect of Stem Termination on Soybean Traits in Southern U.S. Production Systems Crop Sci., January 1, 2000; 40(1): 83 - 90. [Abstract] [Full Text]