Photoperiod and temperature responses in early-maturing, near-isogenic soybean lines
Photoperiod and temperature responses in early-maturing, near-isogenic soybean lines
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DOI：
10.2135/cropsci2001.413721x
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发表时间：
2001-05-01
期刊：
影响因子：
2.3
通讯作者：
Voldeng, HD
中科院分区：
文献类型：
--
作者：
Cober, ER;Stewart, DW;Voldeng, HD
大豆[Glycine mar（L.）梅尔。]在早熟大豆中缺乏等值线、温度和光热反应的鉴定。本研究旨在量化早熟大豆的光温反应。在E1、E3、E4和E7位点具有不同等位基因组合的六个'Harosoy'等值线在具有10-、12-、14-、16-和20-h光周期和18或28 ℃恒温的生长箱中生长。在最诱导的条件下（10和12小时，28 ℃），所有等株均在约26天内开花。在最低诱导条件下（20 h，28 ℃），早花和晚花等值线的开花时间相差50 d。有趣的是，晚开花的等值线开花早于在凉爽的温度下比温暖的温度。建立了一个数学模型来量化温度和光周期对第一朵花的影响。该模型将从播种到开花的物候发育速率与温度、光周期以及温度与光周期的交互作用联系起来。对方程进行解析积分，得到逆时间（1/时间）方程，或在数值上得到类似于热量单位的生长光热日（G（PTD））。该模型有一个基准温度（5.8 degreesC），低于该温度，物候发育率为零，一个临界或基准光周期（13.5小时），低于该光周期没有影响，和两个遗传系数，其中一个随等值线变化。等值线光周期敏感系数与显性等位基因（晚花、光周期敏感）数量呈线性相关。模型与实测数据拟合良好（R-2 = 0.96）。
While photoperiod responses have been studied in soybean [Glycine mar (L.) Merr.] isolines, identification of temperature and photothermal responses are lacking in early-maturing soybean. This study was conducted to quantify photoperiod and temperature responses of early-maturing soybean. Six 'Harosoy' isolines with different combinations of alleles at the E1, E3, E4, and E7 loci were grown in growth cabinets with 10-, 12-, 14-, 16-, and 20-h photoperiods and with either 18 or 28 degreesC constant temperature. Under the most inductive conditions (10 and 12 h, 28 degreesC, all isolines flowered in about 26 d. Under the least inductive conditions (20 h, 28 degreesC, there was a 50 d difference in flowering time between the early- and late-flowering isolines. Interestingly, the late-flowering isolines flowered earlier under cool than under warm temperatures. A mathematical model was developed to quantify the effects of temperature and photoperiod on days to first flower. This model related the rate of phenological development from planting to flowering to temperature, photoperiod and the interaction between temperature and photoperiod. The equation was integrated analytically, resulting in an inverse time (1/time) equation, or numerically resulting in the development of a Growing Photothermal Day (G(PTD)) similar to a heat unit. The model had a base temperature (5.8 degreesC below which the rate of phenological development was zero, a critical or base photoperiod (13.5 h) below which photoperiod had no effect, and two genetic coefficients, one of which varied with isoline. The isoline photoperiod sensitivity coefficient was linearly related to the number of dominant (late flowering, photoperiod sensitive) alleles. The model fit the observed data well (R-2 = 0.96).