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Acta Agron Sin ›› 2017, Vol. 43 ›› Issue (07): 1067-1076.doi: 10.3724/SP.J.1006.2017.01067

• TILLAGE & CULTIVATION·PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Comparison of Photosynthetic Characteristics and Cluster Analysis in Potato Varieties (Lines)

ZHANG Gui-He,GUO Hua-Chun   

  1. Tuber-Root Crops Research Institute, College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China
  • Received:2016-10-01 Revised:2017-03-01 Online:2017-07-12 Published:2017-03-25
  • Contact: Guo Huachun, E-mail: ynghc@126.com, Tel: 0871-5227728 E-mail:sichen003@163.com
  • Supported by:

    The study was supported by the China Agriculture Research System (CARS-10-P21) and the Major Project of Potato Seed Industry in Yunnan Province (2013ZA007).

Abstract:

The light response curve and CO2 response curve of 17 potato varieties (lines) at the full-bloom stage were measured by using the LI-6400XT (a portable photosynthetic apparatus), and photosynthetic parameters were calculated fitting with a rectangular Hyperbola model. There were significant differences among different varieties (lines) in photosynthetic traits. Using principal factor analysis method, six photosynthetic parameters which had a significant impact on photosynthetic type of potato were selected when the cumulative contribution of variance accounted for 86.58%, including maximum net photosynthetic rate (Amax), light compensation point (Ic), dark respiration rate (Rd), initial efficiency of carboxylation (CE), leaf transpiration rate (Tr), and stomatal conductance (Cond.). According to the cluster and discriminant analysis of the six photosynthetic characteristics, 17 varieties (lines) of potato were divided into four categories. After comprehensive evaluation of the traits, five high photosynthetic efficiency varieties (lines) which belong to D class were picked out. These varieties showed higher net photosynthetic rate, stronger shade tolerance, lower consumption, moderate transpiration rate, higher stomatal conductance and medium initial carboxylation efficiency. They were Hezuo 88, D520, Dongnong1014III03, Qingshu 9, and 2010-11, which can be regarded as high photosynthetic efficiency breeding.

Key words: Potato, Photosynthetic parameter, Clustering analysis, Discriminant function, High photosynthetic efficiency

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