论文部分内容阅读
为了研究刺参(Apostichopus japonicus)棘数的重复力、棘数所需度量次数和棘数最大可能生产力(MPPA),本研究针对韩国自繁群体(KK)、多刺自繁群体(DD)、山东自繁群体(SS)和三元杂交群体(DK)4个刺参群体,采用数量遗传学方法估计了12–17月龄刺参棘数的重复力,计算并比较了4个群体棘数所需的度量次数、MPPA及其与刺参体重的相关系数。结果显示,在12–17月龄时,4个群体刺参棘数的重复力从高到低依次为DD(0.29)>DK(0.28)>SS(0.20)>KK(0.19),且均为低度重复力;对DD和DK群体棘数测量5次,测量相对准确率可达80%以上,而SS和KK群体则需要测量8次才能达到80%以上准确率;4个群体刺参棘数的MPPA从高到低依次为DD(41.3)>DK(40.8)>KK(39.8)>SS(39.1),但仅DD和SS群体间存在显著差异(P<0.05);各群体内刺参棘数MPPA与体重均呈现显著的表型正相关(P<0.05)。以棘数作为育种目标性状,其重复力和MPPA可作为选择群体的依据。研究表明,DD和DK群体的棘数多于另外2个群体,并且具有更高的选育潜力,更利于性状测定。因此,可作为重点群体进行进一步选育。
In order to study the repeatability of the spike number of Apostichopus japonicus, the number of spikes and the maximum possible productivity (MPPA) of spike population, Shandong SS population and the three-way cross population (DK) were used to estimate the repeatability of the spines numbers of Stichopus japonicus at the age of 12-17 months by using quantitative genetics method. The numbers of spines of four populations were calculated and compared The number of measurements needed, the MPPA and its correlation with body weight of the sea cucumber. The results showed that the repeatability of the numbers of stichopsis japonicus in four groups from high to low was DD (0.29)> DK (0.28)> SS (0.20)> KK (0.19) from 12 to 17 months old, Low repetitive force. The relative accuracy of the DD and DK populations was over 80%, while the SS and KK populations needed to be measured 8 times to achieve the accuracy of 80% The numbers of MPPA from high to low were DD (41.3)> DK (40.8)> KK (39.8)> SS (39.1), but there was significant difference only between DD and SS groups (P <0.05) There was a significant positive correlation between MPPA and body weight (P <0.05). Spine number as the breeding target trait, its repetitive force and MPPA can be used as a basis for the selection of groups. Studies have shown that the DD and DK population more than the other two populations of thorns, and has higher potential for breeding, more conducive to the trait determination. Therefore, we can conduct further breeding as a key group.