Journal of Integrative Agriculture ›› 2020, Vol. 19 ›› Issue (7): 1789-1801.DOI: 10.1016/S2095-3119(20)63218-X

所属专题: 园艺-分子生物合辑Horticulture — Genetics · Breeding

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  • 收稿日期:2019-01-30 出版日期:2020-07-01 发布日期:2020-05-24

What are the differences in yield formation among two cucumber (Cucumis sativus L.) cultivars and their F1 hybrid?

WANG Xiu-juan1, 2, KANG Meng-zhen1, 3, FAN Xing-rong4, YANG Li-li5, ZHANG Bao-gui6, HUANG San-wen7, Philippe DE REFFYE8, WANG Fei-yue1, 9 
  

  1. 1 The State Key Laboratory of Management and Control for Complex Systems, Institute of Automation, Chinese Academy of Sciences, Beijing 100190, P.R.China
    2 Beijing Engineering Research Center of Intelligent Systems and Technology, Institute of Automation, Chinese Academy of Sciences, Beijing 100190, P.R.China
    3 Innovation Center for Parallel Agriculture, Qingdao Academy of Intelligent Industries, Qingdao 266109, P.R.China
    4 School of Computer Science and Information Engineering, Chongqing Technology and Business University, Chongqing 400067, P.R.China
    5 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, P.R.China
    6 College of Land Science and Technology, China Agricultural University, Beijing 100193, P.R.China
    7 Agricultural Genomes Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, P.R.China
    8 AMAP, University Montpellier, CIRAD, CNRS, INRA, IRD, Montpellier 34000, France
    9 The School of Computer and Control Engineering, University of Chinese Academy of Sciences, Beijing 100049, P.R.China
  • Received:2019-01-30 Online:2020-07-01 Published:2020-05-24
  • Contact: Correspondence KANG Meng-zhen, Tel: +86-10-82544776, Fax: +86-10-82544799, E-mail: mengzhen.kang@ia.ac.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (31700315 and 61533019), the Natural Science Foundation of Chongqing, China (cstc2018jcyjAX0587) and the Chinese Academy of Science (CAS)–Thailand National Science and Technology Development Agency (NSTDA) Joint Research Program (GJHZ2076).

Abstract:

To elucidate the mechanisms underlying the differences in yield formation among two parents (P1 and P2) and their F1 hybrid of cucumber, biomass production and whole source–sink dynamics were analyzed using a functional–structural plant model (FSPM) that simulates both the number and size of individual organs.  Observations of plant development and organ biomass were recorded throughout the growth periods of the plants.  The GreenLab Model was used to analyze the differences in fruit setting, organ expansion, biomass production and biomass allocation.  The source–sink parameters were estimated from the experimental measurements.  Moreover, a particle swarm optimization algorithm (PSO) was applied to analyze whether the fruit setting is related to the source–sink ratio.  The results showed that the internal source–sink ratio increased in the vegetative stage and reached a peak until the first fruit setting.  The high yield of hybrid F1 is the compound result of both fruit setting and the internal source–sink ratio.  The optimization results also revealed that the incremental changes in fruit weight result from the increases in sink strength and proportion of plant biomass allocation for fruits.  The model-aided analysis revealed that heterosis is a result of a delicate compromise between fruit setting and fruit sink strength.  The organ-level model may provide a computational approach to define the target of breeding by combination with a genetic model.
 

Key words: cucumber ,  biomass production ,  functional–structural plant model ,  source–sink ratio ,  fruit-setting ,  PSO ,  heterosis