Lack, however, suggested that clutch size—the number of eggs a bird lays per breeding cycle—is far below the potential limit of egg production.
然而，缺乏情况表明卵的大小——每一个繁殖周期下的蛋的数量——远低于产蛋的潜在限制。
Techniques of apple genetic transformation can improve apple trees and shorten the breeding cycle by molecular methods.
苹果的遗传转化技术通过分子手段改良苹果，有助于缩短其育种周期。
The mammal is distinguished by an unusual breeding cycle that occurs every 18 months and has pups suckle for a year and a half.
这种哺乳动物的显著特点是不同寻常的繁殖周期，每18个月一次，并且要给幼儿海狮哺乳一年半。
Shortening breeding cycle depends on how to overcome the long time span before first flowering and on early selection and test.
决定缩短育种轮回的因素是如何克服林木始花龄晚和能否有效进行早期测验和选择。
Natural variation is one of the traditional reproduce methods, not only its breeding cycle is too long, but also produces little effect.
采用传统的自然变异繁殖方法育种周期长，效果又不明显。
During the course of this varietal improvement, the techniques for shortening breeding cycle were adopted in developing new rice varieties.
在品种改良过程中，用缩短培育周期的技术培育新稻种。
The biological organic fertilizer provided by the invention has the characteristics of broad pesticidal spectrum, short breeding cycle and disease preventing function.
本发明提供的生物有机肥具有广谱杀虫谱，培育周期短，具有防病功能的特点。
However, these breeding technologies have differently some serious weaknesses such as breeding cycle period being too long and heredity of good characters being unstable.
然而，这些育种技术均存在育种周期长、优良性状遗传不稳定等不足之处。
"Because American redstarts return to the same site to breed each year, arriving later may make it harder for them remain to remain in synch with their breeding cycle," Studds said.
“因为美洲红尾鸲每年都返回同一地区繁殖后代，所以返回时间推迟会使它们的到达时期与繁殖时期很难保持一致。”Studds说。
Tissue culture and transgenic research shortened the breeding program cycle, thus provided a promising way to obtain elite citrus germplasm that are cold tolerant.
柑橘组织培养以及建立在此基础上的遗传转化为缩短育种周期、获得抗寒、优质柑橘种质资源提供了新的途径。
The traditional breeding method cycle is long, but genetic engineering to speed up its breeding advancement to provide the new method.
传统的育种方法周期长，而基因工程为加快其育种进程提供了新的手段。
Traditional breeding methods have long cycle and heavy workload, and can not meet the present production needs.
传统的常规育种方法育种周期长且工作量大，不能满足目前生产需要。
This study proved that second cycle inbred lines is still an important breeding methods in future because of considerable mutations happened in selection of second cycle inbred lines.
本研究证明了在二环选系重组过程中也会发生相当程度的变异，表明二环选系在今后依然是玉米育种的重要方法。
The rainbow trout embryo cell line medium cultured by the serum-free rainbow trout embryo cell line medium of the invention has the advantages of rapid breeding speed and long regenerating cycle.
本发明无血清虹鳟胚胎细胞系培 养基培养虹鳟胚胎细胞系具有增殖速度快，传代时间长的优点。
To be without mindfulness or self-control is the breeding ground of evil and defilement, of being entangled in the cycle of births and deaths.
没有念住或自制，就是长养罪恶和烦恼的沃土，被生死轮回所缠困。
To be without mindfulness or self-control is the breeding ground of evil and defilement, of being entangled in the cycle of births and deaths.
没有念住或自制，就是长养罪恶和烦恼的沃土，被生死轮回所缠困。
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