For a seed to be successful, the embryo must be inactive until after it has separated from its parent.
对于一个状态良好的种子，在种子脱离亲本植株之前，胚必须是不活动的。In these cases, the parental cells differ at least with respect to genotype if not phenotype as well.
在这些情况下，亲本细胞即使不在表现型上至少也在基因型上有区别。This works better than selecting random parents and keeping track of who has been a parent already.
这样做的效果好于选择随机亲本并保持对哪些已经是亲本的追踪。The genetic nature of the parental entries in relation to amylographic viscosity measurements evaluated is discussed in detail.
文中曾就参试亲本淀粉糊度测定值之遗传特质详细讨论。And the meiosis did not show any difference on their ploidy level, no matter which parents the genetic messages were acquired from.
各植株包含的遗传物质无论偏向于哪个亲本，在其各自的倍性水平上未能看出减数分裂过程中的差异。Reciprocal cross A cross that tests whether the inheritance of a particular character is effected by the sex of the parent.
杂交是为了测试某一特别的性状是否受亲本性别影响的方法。It was conclueded that selecting parents with high photosynthetic efficiency should take into account of growth performance.
在进行高光效亲本或高光效子代选择时，必须参考形态、物候指标及生长表现。Backcross breeding is a useful method to transfer favorable alleles from a donor parent into a recipient parent.
回交育种是把有利基因从供体亲本向受体亲本转移的一种有效方法，标记辅助选择可加速其进程。The resistance of each parent was significantly positively related to its general combining ability.
亲本的一般配合力效应与其枯萎病抗性呈显著正相关。