Articles

Line × Tester Analysis of Stomatal Conductance, Chlorophyll Content, Photosynthetic Efficiency, and Transpiration Rate Traits in Maize


Abstract


This study evaluated seven inbred lines of maize (Zea mays L.), three testers and 21 hybrids produced by line ×
tester mating design. Stomatal conductance, chlorophyll content, photosynthetic efficiency, and transpiration
rate traits of parents and progenies were observed. The study was conducted in Konya, in the mid-Anatolian
region of Turkey. The mean values of the stomatal conductance, chlorophyll content, photosynthetic efficiency,
and transpiration rate measurements were evaluated using Duncan’s multiple range test for grouping parent and
offspring groups. The variance for general combining ability, the variance for specific combining ability, the relative
variance, additive variance, dominance variance, √D / A, narrow-sense heritability and broad-sense heritability
parameters of the population, along with the heterosis rates of the progenies, were calculated for each trait.
The parental general combining abilities and specific combining abilities of the progenies were determined. We
observed parents with significant and positive general combining abilities [3.4 (stomatal conductance, transpiration
rate); 14.20 (photosynthetic efficiency, transpiration rate)] and their progenies with significant and positive
specific combining abilities [3.4 × FRMo 17 (stomatal conductance, transpiration rate); 3.4 × ADK 451 (transpiration
rate); 14.20 × FRMo 17 (transpiration rate)]. Results of the study showed the possibility of using physiological
properties as selection criteria.

Keywords

Inheritance analysis, Photosynthetic properties, Physiological breeding, Zea mays indentata Sturt

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