日本落叶松原生种源早期选择研究

Study on Early Selection of Primary Provenance of Larix kaempferi(Lamb.) carr.

笔者利用6a生的日本落叶松生长数据对湖北省建始县长岭岗林场的日本落叶松原生种源试验林进行了分析。根据日本落叶松生长早-晚相关性,以6a生时的胸径作为选择指标依据,对日本落叶松原生种源开展了早期选择研究,结果表明:从日本引种的原生种源213个家系之间差异极显著,日本天然林产家系、日本各林业试验场种子园产家系和中国产混合种子间差异极显著。日本各林业试验场种子园产家系是中国产混合种子的1.06倍,是日本天然林产家系的1.26倍;选择生长较好的前34个家系所获得的遗传增益为14.9%。

Six-year-old growing data of Larix kaempferi（Lamb.） carr.in primary provenance experimental forest in Changlingang forest farm in Jianshi County in Hubei province is analyzed by authors.According to early-late correlation,the index of diameter at breast height six-year-old,early selection and research of primary provenance of Larix kaempferi（Lamb.） carr.carried out.The results showed that the primary provenance 213 families introduced from Japan were significant differences,also natural forest family from Japan,domestic family in seed orchard and mixed seed in China from each forest farm in Japan were significant differences.The families from seed orchard in Japanese forest farm were 1.06 times of domestic mixed seed in China,and 1.26 times of natural forest in Japan.The superior 34 families would be got 14.9% the genetic gains.