Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (3): 429-436.DOI: 10.3969/j.issn.1004-1524.2021.03.07

• Horticultrual Science • Previous Articles     Next Articles

Heterosis analysis of photosynthetic parameters of pepper seedling responding to low temperature and low light stress

GOU Bingdiao, DUAN Panpan, YANG Nan, ZHAO Shufang, WANG Yongfu, ZHANG Gaoyuan, WEI Bingqiang*()   

  1. College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2020-08-25 Online:2021-04-02 Published:2021-03-25
  • Contact: WEI Bingqiang

Abstract:

In order to screen the photosynthetic parameters for identifying and predicting the heterosis of pepper, using the parents and their F1 hybrid of pepper as materials, effects of low temperature and low light on net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular carbon dioxide concentration (Ci), transpiration rate (Tr) and chlorophyll content of pepper seedlings were comprehensively analyzed by the method of subordinate function values, grey correlation and correlation analysis. The results showed that the order of photosynthetic parameters to predict the heterosis of pepper from high to low was Ci, Gs, chlorophyll content, Tr and Pn. In addition, superiority from mid-parent heterosis and super-parent heterosis were chosen as the most suitable standards for appraising heterosis of pepper under low temperature and low light stress. The order of low temperature and low light resistance of the three materials was F1 hybrid>male parent>female parent. This study enriched the heterosis theory of pepper, and provided theoretical basis for selecting photosynthetic parameters to predict the heterosis of pepper.

Key words: pepper, low temperature and low light stress, photosynthetic parameters, heterosis

CLC Number: