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 Darroch, B. A. Articles by Baker, R. J. Search for Related Content PubMed Articles by Darroch, B. A. Articles by Baker, R. J. Agricola Articles by Darroch, B. A. Articles by Baker, R. J.

Grain Filling in Three Spring Wheat Genotypes: Statistical Analysis

Plant Sciences, Alberta Environment Ctr., Bag 4000, Vegreville, AB TOB 4LO, Canada
Dept. of Crop Science and Plant Ecology, Univ. of Saskatchewan, Saskatoon, SK S7N OWO, Canada

^* Corresponding author.

Final grain weight, a component of grain yield in spring wheat (Triticum aestivum L.), is dependent on the rate and duration of the grain filling process. Duration of grain filling also affects time to maturity. This study was undertaken to examine grain weight in relation to rate and duration of grain filling in three spring wheat cultivars (Neepawa, Fielder, and HY320) and to develop statistical methods for comparing grain filling curves. Four field trials were conducted at Saskatoon, SK, Canada, in 1986–1988. Wheat spikes were collected twice weekly from each plot to determine average grain dry wt. The relationship between grain weight and accumulated growing degree-days (GDD) from anthesis was described a logistic equation. Final grain weight, and rate and duration of grain filling, were calculated from the fitted curves. Univariate and multivariate analyses of variance were used to examine cultivar differences in grain filling. Stepwise multivariate analysis of variance indicated that maximum grain weight was the most important parameter in characterizing the grain filling curves of the cultivars studied. HY320 had the largest grains (37.0–48.2 mg) in all four experiments and, except in 1986, Neepawa had the smallest grains (29.0–34.8 mg; 36.5 mg in 1986). HY320 had the highest rate grain filling (0.129–0.146 mg/GDD) and Neepawa the lowest (0.096–0.122 mg/GDD) in all experiments. Differences in duration of grain filling were not consistent. Multivariate analysis of variance proved to be a useful tool in examining grain filling curves.

Received for publication May 30, 1989.

This article has been cited by other articles:

				F. Alvaro, C. Royo, L. F. Garcia del Moral, and D. Villegas Grain Filling and Dry Matter Translocation Responses to Source-Sink Modifications in a Historical Series of Durum Wheat Crop Sci., July 1, 2008; 48(4): 1523 - 1531. [Abstract] [Full Text] [PDF]

				F. Alvaro, J. Isidro, D. Villegas, L. F. Garcia del Moral, and C. Royo Breeding Effects on Grain Filling, Biomass Partitioning, and Remobilization in Mediterranean Durum Wheat Agron. J., February 26, 2008; 100(2): 361 - 370. [Abstract] [Full Text] [PDF]

				S. MORITA, J.-I. YONEMARU, and J.-I. TAKANASHI Grain Growth and Endosperm Cell Size Under High Night Temperatures in Rice (Oryza sativa L.) Ann. Bot., March 1, 2005; 95(4): 695 - 701. [Abstract] [Full Text] [PDF]

				L. E. Talbert, S. P. Lanning, R. L. Murphy, and J. M. Martin Grain Fill Duration in Twelve Hard Red Spring Wheat Crosses: Genetic Variation and Association with Other Agronomic Traits Crop Sci., September 1, 2001; 41(5): 1390 - 1395. [Abstract] [Full Text] [PDF]

				A.-G. Li, Y.-S. Hou, G. W. Wall, A. Trent, B. A. Kimball, and P. J. Pinter Jr. Free-Air CO2 Enrichment and Drought Stress Effects on Grain Filling Rate and Duration in Spring Wheat Crop Sci., September 1, 2000; 40(5): 1263 - 1270. [Abstract] [Full Text]