野生玫瑰种子繁殖及保存技术的研究

有性繁殖是物种产生新的基因型、保持遗传多样性的重要机制。人工繁育野生玫瑰实生苗造林,是基因保存的有效方法之一。种子繁殖试验发现,野生玫瑰种子具深度休眠特性,发芽的层积时间需在246 d以上。在玫瑰自然分布区内空旷地带,人工比较栽培试验发现,在相同栽培方法及管理措施情况下,玫瑰原生地沙丘底部苗木成活率较沙丘上部苗木成活率分别提高19%(蘸吸水剂)、21%(不蘸吸水剂),苗木根蘸吸水剂较不蘸吸水剂的造林成活率平均提高53%以上。而在其它野生玫瑰适宜立地栽培发现,野生玫瑰造林方法简单,成活率高,在适宜立地建立异地野生玫瑰基因保存林是可行的。

Seed propagation and preservation techniques of Rosa rugosa

Sexual reproduction is an important mechanism of producing new genotypes by species and maintaining genetic diversity.Plantation using Rosa rugosa seedlings of artificial breeding is a one of effective way for gene preservation. The seed breeding experiments revealed that its seed has a deep sleep characteristic;the stratification time for germination is to be 246 d above.In the open areas of natural distribution region,the comparison trial of artificial cultivation found that: In the case of same method of cultivation and management measures,the survival rate in bottom of the primary sand dune is more than the upper(increased by 19 percent of dipping water-absorbent and 21 % of non dipping water-absorbent,respectively);the average survival rate of seedlings treated by water-absorbent than the control seedlings increased more than 53%.In other sites suitable for Rosa rugosa cultivation,the plantation method has the characters of simple and high survival rate,so that to establishment different places for gene preservation is feasible.