黎蒴二代半同胞家系在广州的早期生长表现

Early Growth Performance of Second-Generation Half-sib Families'Progenies of Castanopsis fissa in Guangzhou

以选育出的37个黎蒴Castanopsis fissa优良家系最优单株的二代半同胞子代为材料,在广州市广东省龙眼洞林场进行生长测定。造林7 m后调查分析树高和地径的生长表现,发现黎蒴二代家系间树高和地径存在极显著差异(P <0.01),其变异系数分别为29.8%和36.1%,表明蕴含丰富的遗传变异。运用生长量比较法筛选到二代优良家系11个,其树高较普通生产种增加了63.6%~109.2%,地径提升了52.7%~86.7%,两个性状综合提高了58.0%~97.6%,说明黎蒴二代优良家系在南亚热带具有较好的早期生长表现。

The second-generation half-sib progenies from the top individuals of 37 genetically-selected superior families of Castanopsis fissa were planted in Longyandong Forest Farm of Guangdong province at Guangzhou city for growth testing.Investigation was conducted on two growth traits after planting for 7 months.The second generations displayed significant differences(P<0.01)in both height growth and collar diameter,and had 29.8%and 36.1%of coefficients of variations for two traits respectively,indicating the existence of vast genetic variations.The selection based on growth comparison screened out 11 superior families from the secondgeneration progenies.The selected families’height,collar diameter and both traits increased by 63.6%-109.2%,52.7%-86.7%and 58.0%-97.6%respectively when compared with the control,which strongly suggested that these superior progenies had outstanding early growth performance in south subtropics.