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Acta Prataculturae Sinica ›› 2024, Vol. 33 ›› Issue (8): 170-180.DOI: 10.11686/cyxb2023392

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Diversity of seed-borne fungi on four Trifolium pratense cultivars

Rong-chun ZHENG(), Zhi-biao NAN, Ting-yu DUAN()   

  1. State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China
  • Received:2023-10-19 Revised:2023-12-11 Online:2024-08-20 Published:2024-05-13
  • Contact: Ting-yu DUAN

Abstract:

Red clover (Trifolium pratense) is an important leguminous forage and green manure crop. However, seed-borne fungi severely affect the seed quality of red clover, and are among the major limiting factors for red clover production. In this study, four varieties of red clover were selected to investigate the species and diversity of seed-borne fungi using indoor isolation and high-throughput sequencing methods. A total of 26 species from 15 genera of seedborne fungi were identified from the four tested varieties, including 14 species from nine genera in T. pratense (cv. Minshan), seven species from five genera in T. pratense (cv. Ruide), nine species from nine genera in T. pratense (cv. VNS), and 11 species from seven genera in T. pratense (cv. Honglong). High-throughput sequencing of fungi from the seed samples of the four red clover varieties identified a total of 87 species from 30 genera, including CladosporiumAlternariaPenicilliumAspergillusStemphyliumSporobolomycesFilobasidiumUdeniomyces, and other genera. Among them, several species of the genera StemphyliumAlternariaCladosporiumAcremoniumBotrytisFusarium, and Erysiphe were identified as potential pathogens. Alpha and beta diversity analyses revealed significant differences in fungal community composition and abundance among the red clover varieties, with T. pratense (cv. Minshan) exhibiting higher diversity of seed-borne fungi compared with that of the other three red clover varieties.

Key words: Trifolium pratense, seed-borne fungi, high-throughput sequencing, diversity