【摘要】 PLM1 2系通过平阳霉素与γ射线复合处理从早籼品种陆青早 1号中诱变获得的温敏型紫叶突变体 ,其突变性状的表现需要较高的温度环境。与原亲本相比 ,PLM1 2的多个主要农艺性状均发生了不同程度的改变。研究认为 ,叶片转紫后光合能力大大下降、光合产物严重不足是导致每穗实粒数大幅度减少、结实率与千粒重显著降低的主要原因。分析认为PLM1 2紫叶突变属于核遗传 ,由 1对隐性主效基因控制 ,同时受若干微效基因修饰更多还原

【Abstract】 PLM12 was a thermo\|sensitive purple leaf mutant selected from Indica rice variety Luqingzao 1 treated with pingyangmycin in combination with γ rays,and for display of its mutant character,a relatively high temperature was required.Compared with its original parent,many major agronomic traits of PLM12 changed to varied extents.Based on spikelet cutting experiment,it was believed that significant decreases in number of filled grains per panicle,fertility,and 1000\|grain weight in PLM12 resulted mainly from a great decline in photosynthetic capacity and serious lack of photosynthates in purple leaves.It was indicated by genetic analysis that expression of the mutant phenotype in PLM12 was conditioned by a single recessive major nuclear gene and modified by several minor genes.更多还原