Genetics of grain filling rate and remobilization of stem reserves in bread wheat under terminal drought stress
Publish place: Journal of Plant Physiology and Breeding، Vol: 12، Issue: 1
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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JR_BREDNG-12-1_011
تاریخ نمایه سازی: 11 آذر 1402
Abstract:
To determine the gene action and inheritance of grain filling rate and remobilization of stem reserves in bread wheat, a ۶×۶ half diallel was performed. The F۱ seeds along with parental varieties were evaluated under terminal drought stress at Islamic Azad University, Ardabil, Iran in ۲۰۱۸. Grain filling rate, effective grain filling period, remobilized dry matter, the contribution of remobilization in grain yield, remobilization efficiency of dry matter, carbohydrates remobilization efficiency, and specific weight of internodes were measured. Results showed the adequacy of the additive-dominance model in all of the characters except for the effective gain-filling period and contribution of remobilization in grain yield. The existence of partial dominance, complete dominance, and over-dominance was observed in control of the measured characters. Generally, broad sense heritability was high and ranged from ۰.۷۲ (carbohydrates remobilization efficiency) to ۰.۸۸ (grain filling rate). However, narrow sense heritability ranged from ۰.۱۷ (carbohydrates remobilization efficiency) to ۰.۶۶ (grain filling rate). Among the traits, grain filling rate had the highest narrow sense heritability (۰.۶۶) followed by the remobilized dry matter (۰.۴۶) and specific weight of internodes (۰.۴۴). There was also a positive relationship between dominance effects and the specific weight of internodes, where dominant alleles were favorable. Based on Griffing’s method, Rasad, Konya۲۰۰۲, and Pishtaz had higher general combining ability (GCA) and consequently favorable alleles for the grain filling rate. However, for remobilization, Rasad and Konya۲۰۰۲ had higher GCA.
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Authors
Maryam Seied-Khamesi
Department of Plant Breeding, Tabriz Branch, Islamic Azad University, Tabriz, Iran
Varahram Rashidi
Department of Plant Breeding, Tabriz Branch, Islamic Azad University, Tabriz, Iran
Hossein Shahbazi
۲Department of Agronomy and Plant Breeding, Ardabil Branch, Islamic Azad University, Ardabil, Iran
Ebrahim Khalilvand Behrouzyar
Department of Agronomy, Tabriz Branch, Islamic Azad University, Tabriz, Iran
Bahram Mirshekari
Department of Agronomy, Tabriz Branch, Islamic Azad University, Tabriz, Iran
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