ISSN:
1435-0653
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Zea mays L.) accessions from the CIMMYT maize germplasm bank. Most accessions were from the West Indies and others were from Central and South America. The accessions 1989). were divided into two trials of 249 accessions and seven common checks that were evaluated in a 16 by 16 α-lattice design with two replications. The trials were planted in two seasons at two sites in Mexico during 1992 through 1994. Data were taken on agronomic and morphological traits and the combined analysis was performed by a mixed linear model. The adjusted means of plant height, ear height, senescence, ear diameter, ear length, days to silk, days to anthesis, moisture (%), rating on ease of shelling, and number of kernel rows were used to cluster accessions into homogeneous groups. Twelve non-overlapping clusters were formed and patterns of phenotypic diversity among and within clusters were determined using canonical discriminant analysis. A selection index based on yield (Mg ha-1), ear rot (%), erect plants (%), and moisture (%) was calculated for each accession. The upper 20% of the accessions (100 in total) which represent the phenotypic diversity of the clusters and have superior selection indexes were used to form a core subset of the Caribbean maize collection.
Type of Medium:
Electronic Resource
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