Abstract
AbstractDoubled haploids of wheat (Triticum aestivum L.) cultivar ‘Chris’ were analyzed for presence of variation in agronomic characters, isozyme patterns, and meiotic traits. Twenty‐two doubled haploid lines and the parent cultivar were evaluated for days of heading, plant height, number of tillers per row, number of kernels per spike, 1,000 kernel weight, yield per tiller, and row yield. Leal material of selected doubled haploids and ‘Chris’ was analyzed by disc polyacrylamide gel electrophoresis for esterase, glutamate oxaloacetate transaminase, and superoxide dismutase. Ring and rod configurations were scored at meiotic metaphase 1. The doubled haploids averaged significantly lower 1,000 kernel weight and yield per tiller than ‘Chris’. Although not significantly different, the doubled haploids were 19% lower in yield than ‘Chris’. Variations in isozyme patterns and meiotic abnormalities occurred in plants of selected doubled haploid lines that were significantly different from the parent cultivar in agronomic characters. These variations suggest that chromosomal abnormalities may have been responsible for altered enzyme activity and agronomic performance of the doubled haploids.
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