猫尾草种质资源农艺与品质性状综合评价

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中图分类号：S543.1 文献标识码：A 文章编号：1007-0435（2025）11-3633-10

引用格式：，等.猫尾草种质资源农艺与品质性状综合评价[J].草地学报，2025，33（11）：3633—3642 FU Jun-shi，NAN Li-li， ZHANG Ze-long，et al.Comprehensive Evaluation of Agronomic and Quality Traits of Timothy GermplasmResources[J].Acta Agrestia Sinica，2025，33（11） ：3633-3642

Comprehensive Evaluation of Agronomic and Quality Traits of Timothy Germplasm Resources

FU Jun-shi， NAN Li- ⋅li ， ZHANG Ze-long， WU Shi-wen， REN Meng-yu CHEN Na， JIAO Long-guang

（1.CollegeofratacaicsicualUeitKyboatoyassadosstucaioGansuProvince7307o，China;2.KeyLaboratoryofForageGermplasmInnovationandNewVarietyBredingofMinistryofAgricultureand RuralAffairs，Lanzhou，GansuProvince73OO7O，China）

Abstract：Using 21 timothy（Phleum pratense） germplasm accessons from domestic and foreign as the research objects，the genetic diversity of the tested timothy grass was analyzed from the perspective of agronomic and quality traits，which could provide scientific basis for the rational selection of parents and breeding of new varieties of timothy.The results from 2O23 and 2O24 showedthat the tested timothy's plant height，dry weight per plant，leafdry weight per plant，stem dry weight per plant，and stem leaf ratio varied within the ranges of 40. 2- 87.5cm ，1. 83-7. 69g ，1.02-4.61 g，0.81-3.40g，and O.62-O.90，respectively；while the dry matter，crude ash，crude protein，crude fat，neutralandacid detergent fiber，relative feed value，digestible dry mater，and dry matter intake varied within the rangesof 94.25%-96.94% ， 6.62%-10.80% ， 5.77%-9.86% ， 0.96%-3.30% ， 40.71%-54.04% ， 21.61%-37.16% ，102. 31% -164. 32% ， 59.95%-72.05% ， 2.17%-2.87% ， respectively. Principal component analysis based on the average values of traits acrosstwo years identified four comprehensive factors explaining a cumulative 90. 360% of the total variation. Combined with cluster analysis， 21 germplasm materials can be divided into 4 categories.Among them，materials of 9451 and 1O676 belonged to the first group，with the highest comprehensive score，which can be used as excellnt parental materials for breeding and improvement of new varieties oftimothy. Stepwise regression analysis screened out six indicators， including relative feed value，crude protein，crude fat，crude ash，stem weight per plant，and plant height， which can be used as the preferred indicators for evaluating the germplasm of high-quality timothy. Key words：Timothy;Agronomic traits;Nutritional quality;Comprehensive evaluation

优质牧草不仅是我国畜牧业发展的基石，也是国家食物安全的重要保障[1]。（剩余16672字）