2个小麦品种籽粒灌浆性状的分析

Analysis of the Grain Filling Traits in Two Wheat Cultivars

为了对小麦新品种的选育提供理论依据,利用Richards方程对小麦品种‘绵麦37’(四川省小麦新品种区域试验对照品种)和‘川麦42’(长江上游冬麦组品种区域试验对照品种)的灌浆性状进行了研究。研究得出了2个品种的主要灌浆性状参数,结果表明,在四川盆地,灌浆速率比灌浆持续时间更能影响小麦粒重,小麦粒重主要受灌浆前期和灌浆中期的灌浆速率的影响,灌浆中期对粒重的贡献达到45%以上。通过以上结果,认为在小麦新品种选育的实践中,要兼顾较长的灌浆持续期、较高的平均灌浆速率和最大灌浆速率、以及抗倒伏性等性状的选择。

In order to provide theory basis for new wheat breeding,Richards equation was used to study the grain filling traits of two wheat cultivars：‘Mianmai 37’ and ‘Chuanmai 42’ in this paper.The study obtained the main grain filling traits of the two wheat cultivars.The results showed that,in Sichuan Basin the grain filling rate influenced the grain weight more important than grain filling duration,the grain weight was effected mainly by the grain filling rates of the early and middle filling stages.The middle filling stage contributed more than 45 percent to the filling of the grain.Based on the above results,this paper proposed the following advice,that was,long grain filling duration and high average and maximum grain filling rates,along with lodging resistance,should be emphasized during the practice of new wheat breeding.