Study on the Effect of Different Pollination Methods on the Seed Setting of Oily Tree Peony
In order to increase the yield of oil tree peony and explore the ideal pollination method for oil tree peony,the common oil tree pe-ony with good fruitiness,strong growth potential,and consistent natural flowering period were selected in the experiment.Different pollin-ation experiments were carried out such as selfing,artificial hybridization and natural pollination,the fruit setting rate,seed setting rate,the weight of a thousand seeds and other dry matter properties of fruit pods such as the size and quality of single pod of follicular fruit were in-vestigated in this study.The results showed that the oil tree peony had a certain self-fruitful,self-pollination in treatment I did not have seed setting,three varieties in treatment Ⅱ had seed setting,and all of hybrid combinations in treatment Ⅲ had seed setting,the seed setting of'Fengdanbai'was the best,0.54 grains per pod.The participating peony varieties were subjected to 4×4 artificial directional diallel hybridi-zation,all combinations had seed setting,and the average fruit setting rate was as high as 92％.the seed setting rate of single pod reached 3.87 grains.Besides,the combination with the highest seed setting rate was'Fengdanbai × Jingtailan',the seed setting rate of single pod re-ached 6.96 grains.The natural pollination in the field had seed setting,and the seed setting rate of'Fengdanbai'was the highest,3.19 grains per piece.The seeds of'Jingtailan'and'Fengdanbai'hybrid combinations had a higher 1,000 grains weight of 436.89 g.The size and quality of pods are closely related to the hybrid female parent,and the performance is outstanding when'Jingtailan'was the female parent.Compre-hensive analysis of the fruit setting rate,the seed setting rate,compound pod weight and other indicator data that corresponding to different pollination methods revealed,the order from high to low was:artificial pollination＞natural pollination＞self pollination.The female parent was an important factor affecting the success rate of hybridization and fruit pod traits.In the production of oil tree peony,higher seed yields can be achieved through reasonable intercropping and mutual pollination of varieties,such as'Jingtailan'and'Fengdanbai'.
oil tree peonyselfingartificial hybridizationnatural pollinationthe seed setting
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