low number of seed set per cross

例句：

1. 1.In this study, we found that the low number of seed set per cross was a significant factor influencing the success of the experiment.
   在这项研究中，我们发现每交配一次的种子数是影响实验成功的一个重要因素。
2. 2. The researcher observed that the low number of seed set per cross could be attributed to the environmentalfactors present during the breeding process.
   研究者观察到，每交配一次的种子数可能归因于育种过程中存在的环境因素。
3. 3.The low number of seed set per cross is a challenge for breeders as it can affect the genetic diversity of the offspring.
   每交配一次的种子数对于育种者来说是一个挑战，因为它会影响后代的遗传多样性。