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供试化杀型(CHA)、T型三系杂种小麦及各自亲本在旗叶一生中的净光合速率(P_n)、叶绿素含量(Chl)和可溶蛋白含量(Sp)均在全展时达到最大值,以后逐渐下降.在春季生育期中群体光合速率(CAP)的变化趋势呈单峰曲线,于开花期达到最大值.与亲本和对照相比,杂种小麦在生育期间于上述性状上多表现正向优势,且优势随生育进程不断增大.杂种小麦在旗叶叶绿素含量缓降期(RSP)、光合速率高值持续期(PAD)和叶源量(LSC)上的表现也优于亲本.LSC与RSP和PAD呈显著正相关.在群体水平上,杂种和亲本、对照品种单位叶面积的光合速率值(CAP/LAI)相近,表明杂种在CAP上的优势主要起因于其LAI的增大.杂种小麦较亲本具有较高的叶绿素可变荧光/最大荧光(FV/FM)比值,这可能是其开花期间午间CAP衰减值低及表现较明显光合优势的原因之一.进一步改善杂种小麦的光合性能,增加光合产物向收获器官的转运效率,对于椎动杂种小麦在生产中的早日应用可能具有重要作用.
The net photosynthetic rate (P_n), chlorophyll content (Chl) and soluble protein content (Sp) of tested hybrids (CHA), T type three-line hybrid wheat and their parents all reached their peak values Maximum, and then gradually decreased.The trend of population photosynthetic rate (CAP) showed a single peak curve during spring growth period, reaching its maximum at flowering stage.Compared with the parental and the control, the hybrid wheat had more performance on the above characters Positive and superiority increased with the growing process.The performance of hybrid wheat on flag leaf chlorophyll content decreasing period (RSP), photosynthetic rate high value duration (PAD) and leaf source amount (LSC) There was a significant positive correlation between LSC and RSP and PAD. At the population level, the photosynthetic rate (CAP / LAI) of leaf area per hybrid and parental and control cultivars was similar, indicating that the predominance of hybrids on CAP mainly resulted from the increase of LAI The higher ratio of chlorophyll fluorescence / fluorescence (FV / FM) to the hybrid wheat had a lower value of CAP attenuation during midday flowering and showed more obvious photosynthetic advantages than that of the parent.Moreover, the improvement of hybrid wheat Photosynthetic properties, increase photosynthetic products to income Transport efficiency organs, for vertebral early application in hybrid wheat production may play an important role.