Components of yield per plant of oil peony Fengdan(Paeonia ostia)
[Objective]To provide reference for promoting the screening of excellent germplasm and high-yield variety cultivation of Fengdan(Paeonia ostii T Hong et J X Zhang).[Method]Using 6-year-old Fengdan as the research object,10 growth traits(diameter of main branch base,length of main branch,diameter of biennial branch base,length of biennial branch,length of twig,diameter of twig base,number of leaves,length of petiole,length of leaf and width of leaf)and 5 reproductive traits(number of single fruit,length of single fruit,number of seeds,number of aborted single fruit pods and yield)were detected during the fruit cracking period.The correlation between each trait was analyzed,and the traits related to yield were screened using stepwise regression method.Then,path analysis was conducted on the screened traits to clarify their effects on yield.[Result]The variations of reproductive traits of Fengdan were greater than that of vegetative traits.The traits that significantly correlated with the yield per plant of Fengdan plant were seed number,length of single fruit,diameter of biennial branch base and length of biennial branch of biennial branch,and length of twig.Seed number had the greatest impact on seed yield(R=0.811),followed by length of single fruit(R=0.210).Diameter of biennial branch base and length of biennial branch of biennial branch,and length of twig affected seed quality by influencing seed number and single fruit length.The per plant yield model of Fengdan constructed with yield(y)as the dependent variable and seed number(x1),length of single fruit(x2),length of twig(x3),and diameter of biennial branch base(x4)as independent variables was:y=0.142 x1+1.123 x2+0.027 x3+0.014 x1 x2+0.011 x1 x4-0.043 x2 x4-3.386.[Conclusion]The key factors influencing the yield per plant of Fengdan are seed number(fruit number)and length of single fruit(fruit size),hinting that the yield per plant of Fengdan is mainly determined by sink size but also regulated by source intensity.In the cultivation practices of oil peony,while adjusting the"source",more attention should be paid to the application of measures to expand the"sink"and obtain high yield.
oil peonyFengdan(Paeonia ostii)yield per plantcomponents of yield
万方数据
维普
