林牧馬の量的形質分析 : II.二歳馬の成長率

概要

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An analysis of grazin g yearlings in the forest was made at the Hidaka Experimental Farm of the Hokkaido University. The growth period of the yearlings was divided into three periods as mentioned below January to April (period l), May to August (period 2) and September to December (period). The years correlation was obtained as 0.53 between 1 and 2, 0.22 between 2 and 3, and 0. 30 between 1 and 3. The genetic influences to each of three periods are II, 69 and 28 per cent of the variation in gains, respectively. These obtained results agree with the weight of foals affected by underfeeding in winter grazing with a prompt recovering in spring. The period 2 may be an optimum time to make an estimation of the selection regarding genetic superiority of the gains. The analysis reveals that there are some environmental correlation between the three periods concerned here, and also in determing the gain of foals, the hereditary element plays a predominant role.
日本育種学会の論文
1956-12-20