10年生粗皮桉种源家系选择分析  

The Selection Analysis of 10-Year-Old Eucalyptus pellita Provenance and Family

作　　者：廖柏勇[1] 刘丽婷[1,2] 莫晓勇[1] 武海霞[1] 陈文平 

机构地区：[1]华南农业大学林学院,广东广州510642 [2]江西省林业科学院,江西南昌330031 [3]国营雷州林业局,广东遂溪524348

出　　处：《华南农业大学学报》2011年第4期72-77,81,共7页Journal of South China Agricultural University

基　　金：广东省林业科技创新专项"按树良科选育和高效栽部技术研究与示范"(2008KJCX004-04)

摘　　要：以粗皮桉种源、家系试验林1～5年生和10年生的树高、胸径的调查数据为基础,进行种源、家系间性状差异性分析,估算出2个性状各个年龄段的遗传力.采用最佳线性无偏预测法(BLUP)估算历年树高、胸径性状的育种值,用最小方差聚类分析法(WARD)对育种值开展种源、家系2个层次的选择分析.结果表明:粗皮桉前5年树高、胸径在家系间的差异性都达到了显著水平,疏伐后,家系间差异性表现不显著.2个性状遗传力以2年生最高,分别为0.147、0.094.分析估算的育种值,14个种源中,澳大利亚种源18749、17861、18750和17860表现最好,具有引种优势;244个家系中,250、233等17个优良家系表现最好.它们将是粗皮桉进一步进行遗传改良的基础.Based on the height （H） and diameter at breast height （DBH） of 1-to 5-year-old and 10-yearold Eucalyptus pellita provenance and family trial forest, the difference of traits in different families and provenance was analyzed. Then the heritabilities of two traits in different years were estimated. Breeding values （BV） for both traits in many years were estimated by Best Linear Unbiased Predict （BLUP）, which were used to choose superior provenances and families by the Ward＇ s Minimum Variance Cluster Analysis （WARD）. The results showed that the difference was significant among families for two traits in 1 to 5 years, but not significant after thinning. It gave the highest heritabilities of each trait at the age of 2, of 0. 147 and 0. 094 respeelively. Besides,. Australia provenances 17860,17861,18749, and 18750 had growth advantage in 14 provenances. Seventeen superior families including No. 233 and No. 250 were selected out from 244 families, which provided fundamental materials for long term breeding of Eucalyptus pellita.

关 键 词：粗皮桉 种源 家系 育种值 最佳线性无偏预测法 

分 类 号：S722.5[农业科学—林木遗传育种]