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Acta Prataculturae Sinica ›› 2015, Vol. 24 ›› Issue (9): 30-42.DOI: 10.11686/cyxb2014406

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Evaluation of the adaptability of imported red clover germplasm in central Gansu

MENG Li-Juan, ZHAO Gui-Qin*   

  1. College of Pratacultural Science, Gansu Agricultural University, Key Laboratory of Grassland Ecology System, Ministry of Education, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Lanzhou 730070, China
  • Received:2014-09-30 Online:2015-09-20 Published:2015-09-20

Abstract: To enrich the red clover (Trifolium pratense) germplasm resource in China and provide superior materials for breeding, we conducted a comprehensive study on the performance of imported red clover germplasm in central Gansu. In total, 31 red clover accessions were evaluated, and 14 traits including morphological, agronomy, and productivity traits were measured. There were significant differences among accessions in growth period, plant height, branch number, leaf area, stem:leaf ratio, regrowth speed, and hay yield. The source of the materials also affected morphological characteristics and productivity. A few accessions showed superior performance of a single trait and could be used directly to increase production. A principal component analysis of the 14 traits indicated that five traits with a 78.94% cumulative contribution rate could be used for comprehensive evaluation of the red clover germplasm. In terms of performance, ZXY2008P-4996 from Russia was the best, followed by Scarlett and Star fire II from the United States. The accession ZXY2008P-5419 had the lowest score and showed the poorest adaptability. The 31 red clover accessions were grouped into four clusters based on principal component indexes.