Studies on Flower Development Characteristics and Breeding System of Heat-resistant Variety Qinmi No.9 Passiflora caerulea L.
To define the characteristics of the development progress of floral organ and the types of breeding system of high heat-resistant variety Qinmi No.9 Passiflora caerulea L.,the phenotypic traits of floral or-gan,pollen viability,stigma receptivity,outcrossing index and pollen ovule ratio were determined.Results show that floral development process of Qinmi No.9 could be divided into 6 stages:squaring stage,corolla de-velopment stage,female and male stamens development stage,flower bud cleft stage,flowering stage and flower faded stage,which lasted for 25-27 days.Flowering time was at 13:00-15:00,and flowering dura-tion of single flower was about 24 hours.Stigma receptivity was the greatest at three days before flowering to flower bud cleft stage.The number of pollen was about 7.94 X 105 per anther.Pollen viability was 90.11％.The type of breeding system of Qinmi No.9 was outcrossing,and self-compatible,which requires pollinators.These characteristics provide important basic conditions for Qinmi No.9 to flower and bear fruits normally un-der high temperature of above 35 ℃.
heat-resistanceQinmi No.9Passiflora caerulea L.flowerpollination abilitypollen viabilitybreeding system
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