鸭梨同源异型突变株的花器官分析

Analysis of Flower Organ in a Homeotic Floral Yali Pear

以20a树龄同一梨园中1株能稳定遗传的花器官变异鸭梨和普通鸭梨为试材,采用形态观测法进行了花芽发育、花粉萌发率、表观形态等方面的研究分析。结果表明:该突变株的花发育与普通植株花的正常发育最明显的差别在于花器官花瓣完全或部分缺失、雄蕊相应增多;花瓣对应位置的雄蕊花丝粗、花药大;花粉萌发率高;部分特化的花瓣上着生有花药。根据试验结果,推断该突变株可能是梨的花同源异型突变株,控制花器官发育的B功能区发生了突变引起花器官异常。该突变株为进一步认识植物花发育的内在调控机制、研究花的发育机理提供了可能。

Taking twenty years old pear of floral organ mutation with genetic stability as materials, the bud growth, pollen germination rate and external morphological were analyzed. The results showed that the mutant strain of flower development and normal development of the most obvious difference were the flower petals with complete or partial deletion of a corresponding increase in the corresponding position of the stamen filaments;anthers of petals corresponding location were large,pollen germination rate was high;the partial specialization petals on the hygiene of anther. According to the experimental results, concluded that the mutant was pear floral homeotic mutant strains, the control of floral organ development B function area produced mutations were the cause of flower organ abnormality. It was possible that the mutant strains provided the further understanding of the internal control mechanism and flower development mechanism of flower development.