Journal of Food, Agriculture and Environment

Combining ability and inbreeding depression of physiological parameters in F₃ population of wheat under drought stress

Author(s):

Mohammad Reza Naroui Rad ^{1, 2} *, Mihdzar Abdul Kadir ¹, Mohd Rafii Yusop ³, Hawa Z. E. Jaafar ⁴, Mahmood Danaee ¹

Recieved Date: 2012-06-23, Accepted Date: 2012-10-01

Abstract:

The study was conducted with the objective of identifying parents to be used in a breeding program to develop lines with well performance under drought stress. Combining ability, inbreeding depression and inheritance of membrane stability index, stomatal conductance, relative water content and chlorophyll content were investigated in bread wheat obtained from half-diallel crossings among eight parental lines in third generation. Cultivars with  names of Irena/Babax//Pastor, S-78-11, Tajan, Chamran, Moghan3, Hamoon, Veery/Nacozari and Hirmand have different performance for this traits. Eight parental genotypes and their resulting 28 F3s were grown in three replications of randomised complete block design. Drought stress was performed with irrigation at 75% soil moisture depletion,  the data collected were subjected to analysis of variance and combining abilities were carried out according to Griffing’s method 2, model 1. General combining ability and specific combining ability effects were significant for traits’ membrane stability index, stomatal conductance, relative water content and chlorophyll content; however, the cultivar Chamran was introduced as a good combiner based on general combining ability and also the line Irena/Babax//Pastor for membrane stability index. The most inbreeding depression was recorded for chlorophyll content. 

Keywords:

Physiological parameters, combining ability, drought stress, inbreeding depression

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Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 3&4
Category: Agriculture
Pages: 875-878

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