论文部分内容阅读
关中地区当前小麦超高产育种的产量指标为 10 0 0 0 kg/ hm2 。产量性状和光合生理性状是决定品种产量潜力的关键性状 ,超高产育种重点应进行单位面积穗数、穗粒重、穗粒数、花后 2 1～ 30 d平均光合速率、花后30 d绿叶面积、灌浆高峰期单穗平均日增重、灌浆高峰持续时间、生物学产量、收获指数等 9个性状的遗传改良。集优交配法是选育超高产品种的有效育种技术。为了适应超高产育种的纵深发展要求 ,要加强光合生理特性、性状遗传规律等基础理论研究和超高产大穗材料创新工作
The yield index of the current super-high-yield wheat breeding in Guanzhong area is 10 0 0 kg / hm2. Yield traits and photosynthetic physiological traits are the key traits determining the yield potential of varieties. The key points of super-high-yielding breeding should be spike number, spike weight per spike, number of grains per spike, average photosynthetic rate of 21-30 d after anthesis, Area, the average daily gain per panicle, the peak duration of grouting, biological yield, harvest index and other 9 traits genetic improvement at the peak of grain filling. Set excellent hybrid law is the breeding of ultra-high yield varieties of effective breeding techniques. In order to meet the requirements of the further development of super-high-yielding breeding, it is necessary to strengthen basic theoretical researches such as physiological characteristics of photosynthesis, genetic laws of traits and innovation of super-high-yielding and big-spike materials