摘要
在中亚热带气候区的永安市开展红锥优树子代测定,2022年对9年生的红锥家系试验林的适应性、耐寒性、生长性状、形质性状进行调查分析,并进行综合评价与选择。结果表明:参试红锥家系能够较好适应试验区域的环境条件,幼林可耐-5℃的短暂极端低温,保存率较高且生长良好。参试家系间树高、胸径、单株材积、枝下高、主干通直度、主干分叉性、侧枝粗细、侧枝密度、侧枝角度9项指标均表现极显著差异,且具有较大的变异和较高的遗传力,9项指标变异系数达18.22%~36.67%,遗传力达73.82%~87.90%;经多性状联合筛选,选出GW36、HX5、A312、HS12、HX2、GW31、GW33、A318、HC23、PX03、A309、HS16、HS11共13个优良家系;与群体平均值相比,13个优良家系的树高、胸径、单株材积、枝下高、主干通直度、主干分叉性、侧枝粗细、侧枝密度、侧枝角度平均遗传增益分别达到11.41%、10.90%、30.33%、20.31%、3.80%、3.22%、8.64%、6.57%、5.15%。研究结果可为扩大红锥栽培范围和良种推广应用提供参考。
The progeny of superior trees of Castanopsis hystrix was determi ned in Yong′an,which is located in the central subtropical climate zone.The adap tability,cold tolerance,growth traits and shape of the 9-year-old C.hystrix fami lies experimental forest were investigated,analyzed,comprehensive evaluated an d selected in 2022.The results showed that the C.hystrix famil ies could bett er adapt to the environmental conditions in the experimental area.The young fo rest could withstand the short-term extreme low temperature of-5℃.The p rese rvation rate was high and the growth was well.The nine indexes,tree height,d iameter at breast height,volume,clear bole height,trunk straightness,trunk b ifurcation,lateral branch thickness,lateral branch density and lateral branch angle,among the families tested showed very significant differences,and had gr eat variation and high heritability.The coefficient of variation of 9 indexes reached 18.22%~36.67%,and the heritability reached 73.82%~87.90%.13 e xcellent families including GW36、HX5、A312、HS12、HX2、GW31、GW33、A318、HC23、PX03、A309、HS16、HS11 were selected through joint screening of multiple traits.The average genetic gains of tree height,DBH,single tree volume,height und er branches,trunk straightness,trunk bifurcation,lateral branch thickness,la teral branch density and lateral branch angle reached 11.41%,10.90%,30.33%,20.31%,3.80%,3.22%,8.64%,6.57%and 5.15%respectively,compared to t he group average.The results provided a basis for expanding the cultivation ra nge of C.hystrix and the popularization of improved varieties.
作者
吴炜
WU Wei(Fujian Yongan Forestry(Group)Incorporated Company,Yong’an 366000,Fujian,China)
出处
《福建林业科技》
2023年第4期28-35,共8页
Journal of Fujian Forestry Science and Technology
基金
福建省林木种苗科技攻关项目(闽林文[2022]52号ZMGG-0706)。
关键词
红锥
家系
适应性
生长性状
形质性状
综合评价
Castanopsis hystrix
families
adaptab ility
growth
shape
comprehensive evaluation
作者简介
吴炜(1978—),男,福建省永安林业(集团)股份有限公司高级工程师,从事苗木繁育和林木遗传育种研究。E-mail:50590299@qq.com。
