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

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in Crop Science 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 ISI Web of Science (6) Citing Articles via Google Scholar Google Scholar Articles by Löffler, C. M. Articles by Cooper, M. Search for Related Content PubMed Articles by Löffler, C. M. Articles by Cooper, M. Agricola Articles by Löffler, C. M. Articles by Cooper, M. Related Collections Crop Genetics Maize Crop Models

Classification of Maize Environments Using Crop Simulation and Geographic Information Systems

Pioneer Hi-Bred International, Inc., 7250 NW 62nd Ave., P.O. Box 552, Johnston, IA 50131

View larger version (35K): [in a new window]   Fig. 1. Geographic distribution and variability of five abiotic environment classes (EC) in the United States for CRM 110 maize in 1952–2002. Number of townships under each variability class indicated in parentheses. Percent Not in Dominant EC: percent of years in which a township classified overall as a given class (e.g., EC = Temperate) fell into a different class (e.g., EC = Temperate Dry, Temperate Humid, High Latitude or Subtropical).

View larger version (27K): [in a new window]   Fig. 2. Frequency in percent of total hectares of CRM 110 maize environments in the USA in 1952–2002, compared to frequencies in 2002, both at the regional (TPE) and site-specific (MET) levels, *p < 0.05.

View larger version (17K): [in a new window]   Fig. 3. Average density shifted histogram of distribution of genetic correlations (rg) within temperate, temperate dry, temperate humid and ECB environment classes for CRM 110 maize in the USA in 2000–2002, compared to the genetic correlations distribution for unclassified environments (all).

View larger version (19K): [in a new window]   Fig. 4. Average density shifted histogram of distribution of genetic correlations (rg) between temperate, temperate dry, temperate humid and ECB environment classes for CRM 110 maize in the USA in 2000–2002.

View larger version (19K): [in a new window]   Fig. 5. Environment-standardized GGE biplot of grain yield of 18 maize hybrids (H1-H18) grown in 266 environments over three years, stratified by state. Percent of the total GGE variation explained by the main two principal components in parentheses. PA: Pennsylvania, MO: Missouri, IN: Indiana, KA: Kansas, IA: Iowa, NE: Nebraska, MD: Maryland, DE: Delaware.

View larger version (20K): [in a new window]   Fig. 6. Environment-standardized GGE biplot of grain yield of 18 maize hybrids (H1-H18) grown in 266 environments over three years, stratified by environment class. Percentage of the total GGE variation explained by the main two principal components in parentheses.