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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (7): 1444-1454.doi: 10.16420/j.issn.0513-353x.2022-0413

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Karyotype and Fertility Analysis of Allotetraploids in Tree Peony(Paeonia section Moutan

ZHONG Yuan, DU Mingjie, CHENG Fangyun*(), LI Kunyan, JI Runze, CUI Jun   

  1. Beijing Laboratory of Urban and Rural Ecological Environment,National Engineering Research Center for Floriculture,Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding,Peony International Institute,School of Landscape Architecture,Beijing Forestry University,Beijing 100083,China
  • Received:2023-02-24 Revised:2023-05-23 Online:2023-07-25 Published:2023-07-26
  • Contact: CHENG Fangyun

Abstract:

Three allotetraploid tree peony materials were first found by karyotype analysis,and their fertility characteristics and breeding potentiality were analyzed based on hybridization test. The results showed that each of the three materials had 20 chromosomes,and the karyotype formulas were as follows:07-LB-30:2n = 4x = 20 = 16m(1SAT)+ 4st(1SAT),07-LB-22:2n = 4x = 20 = 15m(1SAT)+ 1sm (1SAT)+ 4st(3SAT),07-LB-56:2n = 4x = 20 = 16m(3SAT)+ 4st. The hybridization test showed that 07-LB-30 was a superior parent material with good fertility either as male or female parent. 07-LB-22 was an excellent male sterile female parent and of great value in breeding. 07-LB-56 was sterile as the female parent,but showed some fertility as male parent in hybridization,which leads it to an important material for breeding polyploid tree peony with double flower type.

Key words: Paeonia, section Moutan, P. × lemoinei, tetraploid, fertility