节水高产优质杨树纸浆材品种综合选育研究

以10个黑杨杂种候选新品系为试验材料,以当前优良品系108杨和中林46杨等为对照,通过室内和大田水分胁迫试验,同时结合在不同生态区内区域化试验及测定无性系的遗传特性(生长、材性和纸浆性能等),以水分利用效率、产量、材质等指标对候选品系进行综合比较分析,获得了木材纤维长、纤维含量高、木素和1%NaOH抽提物含量低的节水资源高效利用型杨树优良纸浆材新品种J2和J6,为华北、西北地区选育了抗旱、耐盐碱的优良杨树品种.

Integrative Selecting and Breeding of Pop lar Pulpwood Varieties withWater-saving, H igh-yielding and Superior Quality

In th is study, 10 hybrid clones of Section A irge irosw ere used as plantmater ia l and current excellent variet iesP. × euramericana Guarien to# and P. × euramricana ( Dode) Gu ineir cv. ? zhong lin-46# as controls, two new exce llentPopulus pu lpw ood varieties J2 and J6 w ere se lected through indoo r and outdoor w ater stress trials, geneticcharacters( grow th, w ood properties and pu lp y ield etc. ) of reg ional tria ls in d ifferen t eco log ical areas, and in tegrated ana lysis ofWUE, y ie ld and wood qualit ies. J2 and J6 had the characterist ics o f long-fiber, higher ho locellulose,low er lign in con tent and 1% NaOH ex tract ives, w hich filled in the b lank o f drought and salt-resistant pop lar breeding in north and northw est China.