不同杂交处理对泡桐与滇楸远缘杂交后代出苗率的影响

Effect of Different Hybrid Treatment on Rate of Offspring Emergence While Crossing Catalpa duclouxii and Paulownia fortunei by Distant Hybridization

以先年泡桐与滇楸杂交所得种子为试材,采用田间播种试验,观察杂交后代实生苗的出苗情况,研究不同杂交处理对泡桐与滇楸远缘杂交后代出苗率的影响。结果表明:杂交后代平均出苗期较对照均提前1～2d,差异不显著;几种克服杂交不孕的措施中加楸柱头液、加蔗糖液、混合授粉3种处理出苗率较高,差异不显著,子房注射、切断柱头2种处理出苗率相对较低,差异显著。泡桐与滇楸远缘杂交后代有出苗提前的趋势,克服杂交不孕的不同处理对杂交后代出苗期影响不大,对出苗率有不同程度的影响,以期为后期的杂交幼苗变异研究及杂交良种选育提供参考。

The effect of different hybrid treatments on rate of offspring emergence while crossing Catalpa duclouxii and Paulownia fortunei by distant hybridization were studied, the seeds obtained in previous year by crossing Catalpa duclou.rii and Pauloumia fortunei were planted and situation of seeding emergence was observed. The results showed that hybrid seeding emerged in advance by 1～2 days compared with control group, but the difference was not significant. In different treatments to overcome crossinfertility,stigmatic secretion, sucrose solution and mixed pollination had high seeding emergence rate, but ovary injection and stigma cutting had low seeding emergence rate and statistical significance. Hybrid offspring of by crossing Catalpa duclouxii and Paulownia fortunei had an advanced trend in seeding stage, the different hybrid treatments had variant effect on seeding emergence rate of hybrid offspring but not seeding stage. The experiments provided a foundation for the research about hybrids and mutations and crossbreeding.