Genetic variation for and interrelationships among seed vigor traits in wheat from the Caspian Sea coast of Iran

ISSN: 02510952
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Abstract

This study was undertaken to examine the interrelationships of several seed vigor traits in wheat (Triticum aestivum L.) through path-coefficient analysis, to determine broad-sense heritability, and to estimate genetic advance under selection. Germination rate (R50), germination uniformity, percentage of normal seedling, seedling dry weight, seed dry weight, seed water content, electrical conductivity of seed leachate (membrane integrity), seed reserve utilization ratio (fraction of mobilized seed reserves) and seed reserve utilization efficiency (conversion efficiency of mobilized reserves) of 15 wheat genotypes from the Caspian Sea coast of Iran were used for analyses. The genotypes exhibited significant differences for all traits, except for seed water content. Genetic correlations among R50, germination uniformity and seedling dry weight were not significant, showing that selection for any of them might be possible without hampering any other traits. However, path-coefficient analysis indicated that genetic improvement in fraction of mobilized seed reserve and conversion efficiency of mobilized reserves would have no beneficial effect on seedling dry weight, since it would be compensated for by indirect negative effects via seed dry weight. Moderate to high estimates of broad-sense heritability, genetic coefficient of variation and expected genetic advance were obtained for R50, germination uniformity, seedling dry weight and membrane integrity, indicating the possibility for improving these traits. For successful long-term improvement, crossing programs between the genotypes studied here and genotypes from other parts of the country or overseas might be necessary.

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Soltani, A., Zeinali, E., Galeshi, S., & Latifi, N. (2001). Genetic variation for and interrelationships among seed vigor traits in wheat from the Caspian Sea coast of Iran. Seed Science and Technology, 29(3), 653–662.

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