Flowering Characteristics and Breeding System of Rosa persica
In order to understand the flowering characteristics and breeding type of Rosa persica,field obser-vations and studies were conducted on wild population in Xinjiang.The dynamic characteristics of flower-ing,such as floral characteristics,pollen viability and stigma receptivity were observed.The breeding sys-tem was comprehensively analyzed by indicators like outcrossing index(OCI),pollen-ovule ratio(P/O).The results revealed that the flowering period of R.persica population was from early to late May.The duration of individual flower,individual plant and population were approximately 1-1.5 d,10-20 d,and 23 d,respectively.The flowering process could be divided into six periods,bud stage,chromogenic stage,early blooming stage,full blooming stage,declining stage,and withering stage.R.persica is dioecious,with fe-male and male maturation periods highly overlapping.Stigma started to be fertile during the chromogenic stage and pollen viability was up to 86.91％.The pollen-ovule ratio(P/O)was 13 087.22,and the out-crossing index(OCI)was 4.Pollinators included 6 orders and 18 families,with Apis mellifera ligustica being the dominant pollinator.The breeding system is a mixed mating system,with outcrossing requiring pollinators.These results would provide a theoretical basis for a comprehensive understanding of reproduc-tive strategies and conservation of R.persica.
Rosa persicaFlowering characteristicsBreeding systemPollinating insects
万方数据
维普
