有种子的; 结种子的; 具种子的
But seed orchards are difficult to control, because tree pollen spreads so far that alien, non-elite trees almost inevitably muddy the gene pool. 但是有种子的果树很难控制,因为花粉传播的太远了,一些其它种类的树木就会不可避免地弄乱此基因库。