花后水分亏缺对水稻回交后代干物质积累与分配及产量性状的影响

Effect of Water Stress on Biomass Accumulation, Distribution and Yield Character After Heading Stage of Rice Back Cross Descendant

在花后充分供水与控水条件下,对两个水稻回交组合干物质积累、分配及产量性状进行研究,并进行相关分析。研究花后水分亏缺对水稻回交后代干物质积累、分配及产量的影响。结果表明:花后控水处理水稻回交后代群体干物质积累较对照显著减少,干物质运转和分配同时受到一定影响,并且控水处理的每穗结实粒数、结实率和千粒重均降低,导致经济产量下降。花后水分亏缺籽粒产量与总干重、籽粒产量与穗干重间均呈显著正相关。

Under fully and controlled water conditions after anthesis, the biomass accumulation, distribution, Yield and associated analysis in combinations of two rice backcross were studied. Results showed that： water stress after anthesis biomass accumulation of rice backcross descendant community were reduced significantly; Biomass transference and distribution were affected to some degree; and the spikelets per panicle, seed setting rate and 1000-grain weight were all reduced, so that rice economical yield was reduced significantly. Water stress after anthesis grain output and gross dry weight, grain output and panicle dry weight are being remarkably connected.