【摘要】 以银腺杨等为母本 ,毛白杨为父本 ,授粉后一定时间采用秋水仙碱溶液处理花序 ,共获得 40 2粒种子 ,成苗10 7株 ,从中检出 2 1株银腺杨×毛白杨三倍体 .证明授粉后 2 4～ 3 6h是施加秋水仙碱诱导白杨三倍体的有效时期 ,三倍体得率最高达 57 1% .通过这一途径获得的白杨三倍体同样具有十分明显的生长优势 ,2年生实生苗的平均苗高、地径超出全部后代群体总平均值的 2 9%和 65% ,其中以BY3 2 0等表现最佳 ,分别超出群体平均数的 55%和119% .该研究为高效诱导白杨三倍体找到了一条新的途径更多还原

【Abstract】 Populus alba×P. glandulosa)×P. tomentosa triploids were found from the 107 seedlings,which were obtained from 402 hybrids between P. alba×P. glandulosa etc. (male parent) and P. tomentosa(female parent) by treating the pollinated flowers with colchicine. It indicated that the effective period of inducing triploids with colchicine was 24～36 h after pollination. The highest ratio of obtained triploids reached 57 1%. The growth of triploids also showed obvious superiority over normal diploids. The average stem height and basal diameter of 2 year old triploid seedlings was 29% and 65% larger than the average growth of all the offspring respectively. The growth of BY320 is the best,of which stem height and basal diameter was 55% and 119% higher than the average growth respectively. A new way for inducing poplar triploid was obtained through the present research.更多还原