骡子是公驴和母马交配而生的杂种动物。
合子后生殖分离是由杂种后代的无性繁殖而引起的。
Postzygotic reproductive isolation occurs by the inviability of the hybrid offspring.
疫霉菌的杂种具有很强的生存能力，可以在腐生土壤中定植。
Hybrids of Phytophthora cactorum are of strong ability to survive and colonize in saprophytism in soil.
棉花的杂种优势明显，已在生产上广泛利用。
Heterosis in cotton is noticeable and has been widely used in cotton production.
油菜杂种优势利用途径主要有三系法和两系法。
讨论了胞质效应在两系杂种优势利用上的可能性。
The probability of cytoplasm effect used in hybrid wheat was discussed.
小偃54是一个具有杂种优势、品质优良的小麦品种。
Xiaoyan 54 wheat is of high quality and has an advantage of crossbreed.
实践证明，杂种优势利用是提高油菜产量的主要途径。
To achieve this, heterosis utilization is proved to be a very effective way.
这为进一步深入探讨杂种优势形成机理奠定了一定的基础。
The results obtained in this study will be helpful for further elucidating mechanism of heterosis.
本文研究了油菜种间杂种后代株高与产量性状间的关系。
The relationship between plant height and yield components of rape interspecific hybrids was studied.
杂种优势的产生与亲本和子代间基因的差异表达密切相关。
Differential gene expression is mainly responsible for heterosis between parents and progeny.
推导了三元杂种优势率经典估计方法的新的统计检验公式。
A new statistical formula is constructed for testing the significant level of estimated results of classic estimation of three-way heterosis.
但单株籽粒蛋白质产量表现正向杂种优势，平均17.20%。
But the average heterosis of all hybrids in grain protein yield per plant was 17. 20%.
互作效应普遍存在，是烟草性状杂种优势表现的主要原因之一。
The epistatic effects could not be ignored in tobacco breeding. They were one of main causes of heterosis for most characters.
甘蓝型油菜主要农艺和产量性状的杂种优势及其分离世代的分析。
Heterosis and segregation on agronomic and yield traits in brassica napus l.
目前研究普遍认为，亲本之间存在的差异应该是杂种优势产生的基础。
Current researches think that the different genetypes between the parents should be the foundation of heterosis in plants.
探讨了遗传距离对向日葵亲本选配和杂种优势预测的可能性及实用价值。
The possibility and practical value of the forecast of parents selection and hybrid vigour of sunflower were discussed.
从本实验的结果来看，差异表达模式与杂种优势之间并没有必然的联系。
The results indicated that there was no certain relationship between differential gene expression patterns and heterosis.
目的建立杂种犬肺内源性、外源性急性呼吸窘迫综合征（ARDS）模型。
Objective To establish acute respiratory distress syndrome (ARDS) induced by pulmonary and extra pulmonary causes in dogs.
因此，在利用分子标记技术预测油菜的杂种优势时，SRAP标记效果更好。
Thus, for the prediction of yield heterosis, SRAP markers are better than SSR markers.
应用化学杂交剂(CHA)诱导雄性不育是小麦杂种优势利用的重要途径之一。
Male sterility of wheat inducing by Chemical hybridization agents (CHA) is one of the main ways to produce hybrid wheat seed.
研究结果对我国肉用绵羊资源的评估、保存和预测杂种优势具有一定的指导意义。
The results may be useful as an initial guide in evaluating the level of genetic variation, developing conservation strategies and predicting heterosis.
杂种f 1花药不开裂的原因随其所含的杂合花粉不育基因座位种类和数目不同而异。
The main causes resulting in poor anther dehiscence in hybrid F1 were different with the kind and the number of heterozygous pollen sterility loci.
用对应分析法对8个棉花野生种的杂种后代共83份材料的主要经济性状进行了分析。
The main economic properties of the species hybrid posterities of 8 cotton wild varieties from 83 portion of materials were analysed.
本文还讨论了新不育系的遗传组成及在油菜杂种优势利用和机理研究方面的重要作用。
The genetic composition of the new sterility and its mechanism and the prospect of its utilization are discussed.
本文研究了向日葵各性状的杂种优势及其变异程度，杂种优势同亲本各特征值的相关性。
The experiment was carried out to investigate each character of sunflower and its variation extent, and the correlation of the heterosis and the parent character value.
杂种优势是生物界普遍存在的十分重要的生物学现象，并在多种动植物中得到成功地利用。
Heterosis, a widely existing biological phenomenon, has been successfully exploited on breeding of many plants and animals.
水稻是杂种优势利用最成功的作物之一，近几年对水稻杂种优势的遗传学基础也有很深入地认识。
Rice, one of the most important crops and showed greatest success on heterosis application, has deeply studied for the genetic basis of heterosis in recent years.
水稻是杂种优势利用最成功的作物之一，近几年对水稻杂种优势的遗传学基础也有很深入地认识。
Rice, one of the most important crops and showed greatest success on heterosis application, has deeply studied for the genetic basis of heterosis in recent years.
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