低氮胁迫对玉米染色体片段导入系产量和苗期性状的影响

目的]探讨玉米染色体片段导入系在氮胁迫下的生长反应。方法]在正常供氮（N＋）与氮胁迫（N-）条件下,对玉米染色体片段导入系产量和苗期性状进行了研究。结果]Ye478与5个导入系产量和苗期性状有明显差异;与N-相比,N＋条件下产量和不同处理时期苗期生物量均有增加,其中L58和L28产量因子增幅较小,是氮胁迫条件下氮高效利用的导入系;L8增幅较大,是氮胁迫条件下氮低效利用的导入系。结论]为耐低氮玉米品种的选育提供了理论依据。

Effects of Low Nitrogen Stress on the Yield and Seedling Traits of Maize Chromosome Fragment Introgression Line in Maize

Objective]The aim was to study the growth reaction of maize chromosome fragment introgression line under N stress.Method] The changes of yield factor and seedling traits were studied by using maize chromosome fragment introgression line under the normal nitrogen fertilization(N +) and low nitrogen stress(N-) conditions.Result]The Ye478 with five introgression line yield and seedling characters had obvious difference.The yield and seedling biomass were more higher over the 3 treatment stages under N + than N-condition,among them L58 and L28 with little increasing rates were a high nitrogen using efficiency introgression line under nitrogen stress,while L8 with more increasing rates was a low nitrogen using efficiency introgression line under nitrogen stress.Conclusion]The research provides theoretical basis for breeding maize varieties with a resistance to low nitrogen.