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Acta Agron Sin ›› 2018, Vol. 44 ›› Issue (01): 63-74.doi: 10.3724/SP.J.1006.2018.00063

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

Genetic Diversity Analysis and Comprehensive Assessment of Phenotypic Traits in Introduced Potato Germplasm Resources in Arid and Semi-arid Area

YU Bin1,YANG Hong-Yu1,WANG Li2,LIU Yu-Hui1,BAI Jing-Pin1,WANG Di1,ZHANG Jun-Lian1,*   

  1. 1 College of Agronomy, Gansu Key Laboratory of Crop Improvement & Germplasm Enhancement, Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, Gansu, China; 2 College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, Gansu, China
  • Received:2017-03-29 Revised:2017-09-10 Online:2018-01-12 Published:2017-09-28
  • Supported by:

    This study was supported by International Science & Technology Cooperation Program of China (2014DF G31570), China Agriculture Research System (CARS-10-P18).

Abstract:

In China, potato is a kind of foreign crop lacking germplasm resource,especially the varieties grown in arid and semi-arid areas. Therefore, it is an effective way to rich the germplasm resource by introducing potatoes abroad. In this study, the Shannon-Wiener’s diversity index and comprehensive score (F-value) were used to investigate the genetic diversity of 119 introduced potato clones from Peru International Potato Center about 10 phenotypic traits (emergence rate, plant height, stem diameter, leaf area, growth period, tuber number per plant, yield per plant, commodity rate, dry matter content and tuber length-width ratio). The genetic diversity of growth period was the most abundant among these phenotypic traits in 119 potato clones. Stem diameter, leaf area, growing period, tuber number per plant, yield per plant, commodity rate, dry matter content and tuber length-width ratio had significant effects on comprehensive value of phenotypic traits, and could be used to evaluate the potato germplasm resources on the drought farming. The F-value was significantly correlated with the economic characters (yield per plant, commodity rate and dry matter content), which can be used as the main evaluation index of potato germplasm resources. CIP393228.67 and CIP385561.124 in arid area and CIP304350.95, CIP392797.22, and CIP388615.22 in semi-arid area showed high and stable yield characteristics. These 119 introduced potato clones are rich in genetic diversity with good comprehensive evaluation, they could effectively complement potato germplasm resources and be beneficial to potato breeding in China.

Key words: potato, introduced germplasm, phenotypic traits, genetic diversity, comprehensive assessment, arid and semi-arid area

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