Scientia Agricultura Sinica ›› 2013, Vol. 46 ›› Issue (4): 841-848.doi: 10.3864/j.issn.0578-1752.2013.04.018

• ANIMAL SCIENCE·VETERINARY SCIENCERE·SOURCE INSECT • Previous Articles     Next Articles

Selection of Excellent Germplasm Resources of Elymus nutans in Alpine Region

 CHEN  Hong-Yang, FU   Hua, HUANG  De-Jun, ZHOU  Hong-Jin   

  1. College of Pastoral Agriculture Science and Technology, Lanzhou University/State Key Laboratory of Grassland Agro-ecosystems, Lanzhou 730020
  • Received:2012-07-13 Online:2013-02-15 Published:2012-09-10

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Abstract: 【Objective】 This study aimed to provide basic materials for parents matching and synthetic variety breeding of E. nutans with high yield and good quality in alpine region. 【Method】 Through field experiments, hay yield traits, crude protein (CP), water soluble carbohydrate (WSC), neutral detergent fiber (NDF) and acid detergent fiber (ADF) of 11 E. nutans populations from Qinghai-tibet plateau were investigated and appraised. 【Result】 The variations of eleven E. nutans populations were great in hay yield characters and nutritive qualities, the coefficient of variation of hay yield is the largest, which is 52.13%, while the variation coefficient of NDF is the smallest, which is 3.97%. A single character comparison between different populations showed that P8 had high hay yield, being 2971.66 kg•hm-2, while the highest CP was 22.61% for P1, which also has the lowest NDF and ADF, being 59.75% and 36.26%, respectively; P3, P4, P5, P6 and P7 had high sugar content, being 5.18%, 4.46%, 5.53%, 5.79% and 6.15%, respectively. 【Conclusion】 Based on the single character, P8 can be used as the parent material of high yield, P1 and P9 can be used as the parent materials of high nitrogen and low fiber, respectively, while P3, P4, P5, P6 and P7 can be used as the parent materials of high sugar, the mentioned materials all can participate in the conventional hybrid breeding. Based on yield and nutrient quality characters, P1 is of middle yield, high nitrogen and low fiber material, P2 is of high yield and middle nitrogen materials, P8, P9 and P10 are of high yield and middle sugar materials, while P3 and P4 is of middle yield and high sugar materials. The above mentioned materials as high yield and good quality materials under selective breeding can be used to develop new varieties rapidly.

Key words: alpine region , Elymus nutans , yield , nutritional quality , parent selection

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