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Abstract：
This research investigated the growth and other production traits of four distinct lines (L1, L2, L3, and L4) of Japanese quail (Cortunix japanoica) kept in the tropical climate of Tamil Nadu, India. The traits related to body weight at different weeks and weight gain were measured in 180 birds (90 males and 90 females) per line up to the fifth week of age, and then 90 birds (females only) from the sixth to the 16th week of age, with egg production and feed efficiency parameters measured in 10 observations per line. The traits were analysed using the General Linear Model procedure, and Tukey\'s HSD was used to test for statistical differences (p < 0.05) between the means for subclasses under a specific effect. The results revealed a highly significant difference (p < 0.01) in body weight from hatch to fifth week of age. At 5th week of age, the L3 and L2 did not differ (p > 0.05) based on Tukey test; therefore, both presented the highest values and were statistically significant (p < 0.01) with L4 with a lowest value of 203.62 g. The cumulative fifth week feed conversion ratio showed non-significant difference (p > 0.05) at first and second week, and highly significant difference (p < 0.01) from third to fifth week of age. The age at 50 per cent egg production was 60.2 (L4), 61.4 (L2), 65.1 (L3) and 66.0 (L1) days and the L1 egg production differed significantly (p < 0.01) from L4 line. The highest bodyweight (g) during the laying period (at 15 weeks of age) was observed in L2 (327.08) and L3 (326.54) and differed significantly (p < 0.01) from L1 (309.24) as well as L4 (288.69) lines. The mean egg weight (g) of different lines showed non-significant difference (p > 0.05) at all weeks, except at 11th week of age (p < 0.01). The mean feed consumption (g)/bird/day differed significantly (p < 0.01) from 6th to 16th week of age, except at sixth and eighth week of age, where it was non-significant (p > 0.05). The overall feed efficiency/dozen of eggs (from 6th to 16th weeks) ranged from 1.33 (L1) to 1.98 (L3). The livability from 6 to 16 weeks of age was 100 per cent in all the lines. In order to boost Japanese quail production in the tropics, L3 and L4 may be selected for body weight and egg production, respectively.
摘要：
这项研究调查了泰米尔纳德邦热带气候中保存的日本鹌鹑（Cortunixjapanoica）的四个不同品系（L1，L2，L3和L4）的生长和其他生产特性，印度。到第五周龄，每排180只鸟（90雄性和90雌性）测量了与不同周龄体重和体重增加相关的性状，然后从6到16周龄的90只鸟（仅限雌性），产蛋量和饲料效率参数在每行10次观察中测量。使用一般线性模型程序分析性状，和Tukey的HSD用于检验特定效应下亚类均值之间的统计学差异(p<0.05)。结果显示，从孵化到第五周龄的体重差异非常显着（p<0.01）。在第5周大的时候，根据Tukey检验，L3和L2没有差异(p>0.05)；因此，两者均呈现最高值，并且具有统计学意义（p<0.01），L4的最低值为203.62g。累积的第五周饲料转化率在第一周和第二周显示无显着差异（p>0.05），第3周至第5周龄有极显著差异(p<0.01)。产卵50%的年龄为60.2(L4),61.4（L2），65.1（L3）和66.0（L1）天，L1产蛋量与L4系差异显着（p<0.01）。在L2（327.08）和L3（326.54）中观察到产蛋期（15周龄）的最高体重（g），并且与L1（309.24）和L4（288.69）系存在显着差异（p<0.01）。不同品系的平均卵重(g)在所有周表现出不显著的差异(p>0.05),除第11周龄外（p<0.01）。从6到16周龄，平均饲料消耗量（g）/鸟/天差异显着（p<0.01），除了第六和第八周大的时候，其中无显著性(p>0.05)。总体饲料效率/打卵（第6至第16周）的范围为1.33（L1）至1.98（L3）。在所有品系中，6至16周龄的宜居性均为100％。为了提高日本鹌鹑在热带地区的产量，L3和L4可以选择用于体重和产卵，分别。
