Emergence and initial development of inbred maize lines in a temperature gradient chamber. II. Initial development of inbred lines.
1991
Marton, L.C. (Magyar Tud. Akad. (Hungary). Mezogazd. Kut. Int. Martonvasar)
The plant height, leaf number, dry shoot mass and leaf area of 6 inbred maize lines were compared on the 48th day after sowing at 10 different temperatures in the 9-18degreesC range, with 1degreesC intervals. With changing temperature, changes of plant height were linear and those of leaf number were hyperbolic, changes in dry shoot mass and leaf area could be described using second-degree functions. When averaged over the temperature range investigated, plant height was greatest for the lines A 654 and CM 174 and smallest for Mo 17 and F 2. Judging by its plant height at 9-10degreesC, H Mv 307 was the second most cold tolerant type, but it responded far less intensely to rising temperature than the other lines, and dropped to last place at 16-18degreesC. As a function of temperature, CM 174 had the greatest dry shoot mass was produced by A 654 and the smallest by F 2. Differences between the lines were more prominent at higher (12-18degreesC) temperatures. Among the lines, A 654 had the greatest leaf area and F 2 the smallest. At all temperatures there was a close correlation between dry shoot mass and leaf area, there was a close correlation between cold tolerance index and plant characters only at low temperatures.
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