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    Comparison of maize lines and their test crosses according to grain yield and some physiological properties
    (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2019) Özdemir, Elif.; Sade, Bayram.
    This study evaluated 7 inbred lines of maize (Zea mays L.), 3 testers, and 21 hybrids produced using the line x tester mating design. The study was conducted in Konya, in The Central Anatolia Region of Turkey. CD (coefficient of determination) values were calculated to detect the effect of inbred lines on grain yield and other physiological properties of the test crosses. The mean values of all the parameters of the genotypes were evaluated using the Duncan's multiple range test for grouping progenies and parent groups. The CD values between parent groups and progenies were statistically significant for photosynthetic efficiency (r(2) = 0.11**; P < 0.01) and Mg content (r(2) = 0.14**; P < 0.01). The CD value for grain yield of line 14.2 was 0.58; for chlorophyll content, anthocyanin content, and grain yield of line 14.20 CD values were 0.70, 0.25, and 0.55, respectively. Similarly, the CD values for total anthocyanin and Mg contents of line 14.21 were 0.36 and 0.48, respectively. The inbred line 14.20 was effective for the formation of chlorophyll, total anthocyanin content, and grain yield according to its high CD values, and progenies of the line were within the first group for other properties, according to the Duncan's multiple range test (14.20 x FRMo 17 [total anthocyanin content, grain yield], 14.20 x ADK 451 [chlorophyll content, grain yield]). A hybrid produced from an inbred line that has high CD values within the first group represents the genetic potential of the inbred line, supporting the use of CD values for parental selection methods in breeding studies.
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    Line x Tester analysis of stomatal conductance, chlorophyll content, photosynthetic efficiency, and transpiration rate traits in maize
    (MAYDICA-IST SPER CEREALICOLTUR, 2019) Ozdemir, Elif.; Sade, Bayram.
    This study evaluated seven inbred lines of maize (Zea mays L.), three testers and 21 hybrids produced by line x 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, root 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 x FRMo 17 (stomatal conductance, transpiration rate); 3.4 x ADK 451 (transpiration rate); 14.20 x FRMo 17 (transpiration rate)]. Results of the study showed the possibility of using physiological properties as selection criteria.