2年生桉树杂交种生长与抗风的遗传变异研究  

Genetic variation in 2-year Eucalypt hybrids' growth and typhoon resistance

作　　者：罗建中[1,2] 谢耀坚[2] 曹加光[2] 卢万鸿[2] 任世奇[2] 

机构地区：[1]南京林业大学,江苏南京210037 [2]国家林业局桉树研究开发中心,广东湛江524022

出　　处：《草业学报》2009年第6期91-97,共7页Acta Prataculturae Sinica

基　　金：国家"十一五"科技支撑项目(2006BAD01A1504);国家"十一五"科技支撑项目(2006BAD03A0107);国家林业局林业科学技术研究项目(2006-09)资助

摘　　要：以2×10的析因交配桉树杂交种为研究材料,杂种的母本为尾叶桉和细叶桉,父本为巨桉、粗皮桉、细叶桉和尾叶桉。对27个月生杂交种的材积生长、抵抗风速为18和40 m/s台风的抗风指数（WR1和WR2）的研究表明,材积生长在母本间差异不显著（P〉0.05）,但在父本间、母本与父本的交互作用间差异显著（P〈0.05）;WR1在父、母本间均存在显著差异（P〈0.05）,WR2只在父本间差异显著（P〈0.05）。在材积生长上,巨桉作为父本具有高的一般配合力,T1×G2、U1×P3具有高的特殊配合力;在抗风指数上,G1、G2和P2作为父本分别对WR1和WR2具有高的一般配合力。材积生长性状受加性基因和显性基因的控制,狭义和广义遗传力分别为0.14-0.17和0.30-0.36;抗风指数受加性基因控制,遗传力为0.10-0.11。以尾叶桉为母本的子代材积生长性状遗传力高于细叶桉母本的子代、抗风指数的遗传力高于细叶桉母本的子代;材积生长性状与WR1总体上呈显著正相关（P〈0.05）,与WR2呈显著负相关（P〈0.05）。Using a 2×10 factorial mating＇s eucalypt hybrids as material： Female parents are Eucalyptus urophylla and Eucalyptus tereticornis,male parents are Eucalyptus grandis,Eucalyptus pellita,E.urophylla and E.tereticornis.The 27-month tree stem volume growth and resistance index to typhoon with speed of 18 and 40 m/s（WR1 and WR2） were studied on the hybrids respectively.The results showed： For growth traits,there were no significant difference between female parents（P〉0.05）.Significant differences were exist between male parents,between the interaction of female and male parents（P〈0.05）.There were significant differences（P〈0.05） between female parents,betweens male parents for WR1（P〈0.05）.WR2 was only significantly different（P〈0.05） between male parents.For tree volume growth,E.grandis had high general combining ability（GCA） as male parents,combination： T1×G2 and U1×P3 had high special combining ability（SCA）;For typhoon resistance,G1,G2 and P2 had high GCA on WR1 and WR2 as male parents respectively.Tree volume growth traits were controled by additive gene action and dominance gene action together,their narrow sence and board sence heritabilities were 0.14-0.17 and 0.30-0.36;typhoon resistance index only controled by additive gene action,their heritabilities were 0.10-0.11.The growth traits＇ heritability of progenies of E.urophylla as female parent were lower than that of E.tereticornis.But their heritabilities of typhoon resistance were higher than that of E.tereticornis.Volume growth traits generally had significant positive genetic correlation（P〈0.05） with WR1.But had significant（P〈0.05） negative genetic correlation with WR2.

关 键 词：桉树 杂交种 抗台风 生长 遗传变异 

分 类 号：S792.390.1[农业科学—林木遗传育种] Q943.1[农业科学—林学]