Variability and Correlation of Yield and Forage Quality in Alfalfa Varieties of Different Origin
Variability and Correlation of Yield and Forage Quality in Alfalfa Varieties of Different Origin
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DOI：
10.15832/tbd.07864
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发表时间：
2017-03
影响因子：
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通讯作者：
R. Štrbanović;R. Stanisavljević;L. Đukanović;D. Poštić;J. Marković;V. Gavrilović;N. Dolovac
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文献类型：
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作者：
R. Štrbanović;R. Stanisavljević;L. Đukanović;D. Poštić;J. Marković;V. Gavrilović;N. Dolovac
苜蓿是最重要的饲用植物。世界上有许多苜蓿品种具有提高的产量潜力和饲料品质。它们中的许多也是在东南欧地区使用各种育种技术创造的。这项调查是在塞尔维亚中部进行的，包括15个不同来源的苜蓿品种（9个来自美国，6个来自欧洲）。目的是测定其在第二年（A1）和第三年（A2）的每茬产量和总干物质产量（TDMY），以及牧草品质：矿物质（MM）、粗蛋白（CP）、粗纤维（CF）、粗脂肪（CFM）和无氮浸出物（NFE）的含量。供试品种的干物质产量（DMY）总体变异较大（A1：CV= 13.19%，A2：CV= 9.33%）。美国品种DMY变异性（A1：CV= 13.65%; A2：CV= 9.92%）高于欧洲品种（A1：CV= 6.67%; A2：CV= 8.01%）。美国品种的粗蛋白含量变异性也大于欧洲品种（CV分别为6.27%和2.68%）。品种（基因型）之间的差异也影响了牧草品质参数的总变异，总变异系数范围为5.07%的CP至10.48%的CF。干物质产量与粗蛋白（r= 0.344）、粗纤维（r= 0.342）和粗纤维量（r= 0.306）呈极显著正相关，其中粗纤维量与非纤维素产量呈极显著负相关（r= -0.917）。
Alfalfa is the most important forage plant species. There are numerous alfalfa varieties in the world with improved yield potential and forage quality. Many of them have also been created in the region of Southeast Europe, using various breeding techniques. This investigation was carried out in central Serbia and it included 15 alfalfa varieties of different origin (nine from USA and six from Europe). The objective was to determine their yield in each cut and total dry matter yield (TDMY) in the second (A1) and third (A2) year of exploitation, as well as forage quality: the content of mineral matter (MM), crude protein (CP), crude fiber (CF), crude fat matter (CFM) and nitrogen-free extract (NFE). Investigated varieties exhibited high total variability in dry matter yield (DMY) (A1: CV= 13.19%; A2: CV= 9.33%). DMY variability was higher with the varieties from USA (A1: CV= 13.65%; A2: CV= 9.92%) than with those from Europe (A1: CV= 6.67%; A2: CV= 8.01%). Varieties from USA also proved more variable in crude protein (CP) content than European varieties (CV= 6.27% and CV= 2.68%, respectively). Differences between the investigated varieties (genotypes) also influenced total variability of forage quality parameters, with total CV ranging from 5.07% for CP to 10.48% for CF. Dry matter yield (DMY) had significant positive correlation with CP (r= 0.344), CF (r= 0.342) and CFM (r= 0.306), and the strongest correlation, although negative, was between CF and NFE (r= -0.917).