- 更多网络例句与杂种状态相关的网络例句 [注:此内容来源于网络,仅供参考]
-
The rate of maize yield growth has being declining due to narrow genetic background and limited new heterotic patterns since 1970s.The role of tropical and subtropical maize germplasm in maize improvement was discussed in this paper.
但70年代以来我国玉米增产率呈下降趋势,玉米生产一直处于徘徊状态,其主要原因是国内种质资源匮乏,缺乏新的杂种优势群和杂种优势模式。
-
In the course of present investigation in interspecific hybrid of Tritical crops, cytomixis mas observed at microspore stage, the present investigation deals with detailed analysis of this phenomenon at different conditions.
作者在麦类远缘杂种的减数分裂过程中发现,在减数分裂Ⅰ的前期和小孢子时期均存在核穿壁的现象,并对各种状态下的穿壁现象进行了详细的观察研究。
- 更多网络解释与杂种状态相关的网络解释 [注:此内容来源于网络,仅供参考]
-
hybridism:杂种状态
前二项将在这里讨论;其他种种异议在下一章讨论;本能和"杂种状态"(Hybridism)在接下去的两章讨论. 因为近似的或代表的物种,当生存在一个连续的地域内时,各个物种都有广大的分布范围,它们之间有着一个比较狭小的中间地带,在这个地带内,