火炬松引种家系的适应性和稳定性评价

基因型与环境的互作往往引起较大的增减产效应,对福建省引种的火炬松家系进行多点联合方差分析及主效应分析.结果表明,各生长因子的家系方差、地点方差和家系与地点的互作方差均达显著或极显著水平.各测试点的环境指数达显著水平,洋口点的生境利于火炬松增粗、增产,南屿点的生境利于火炬松树高增产,南安点的各环境指数则均为显著负效应.树高的互作方差较大的前5位家系依次为23、20、15、16、3号,胸径的互作方差较大的前5位家系依次为24、15、3、23、22号.运用生态价、回归系数和回归离差3种稳定性参数对引入家系的遗传稳定性进行评价, 24、23、20、22、3号家系具有生物学上的稳定性;11、12、13、15、18、19、21、25号家系具有广泛的适应性,16、17、20、22、23、24号家系特别适宜于优良的环境;8、6、4、9、1、2号家系对环境反映不敏感,具有农艺学上的稳定性.

The Adaptability and Stability Evaluation on Introduced Families of Pinus taeda

The mutual effect of gene type and circumstances often caused notable increase or decrease of production. The adaptability and stability analysis on introduced families of loblolly pine in Fujian Province indicated that there were significant differences in families, sites, gene and site mutual variance. The environment indexes of 3 sites all reached significant level. Yangkou site was propitious to the growth of diameter at breast-height and volume. Nanyu site was propitious to the growth of height, but the environment indexes of Nanan were all negative. The preceding 5 families which mutual variance were big in height were No. 23, 20, 15, 16, 3 and in diameter at breast-height were No. 24, 15, 3, 23, 22. No. 24, 23, 20, 22 and 3 families were very steady in biology. No. 11, 12, 13, 15, 18, 19, 21 and 25 families had wide adaptability, No. 16, 17, 20, 22, 23 and 24 families only grew well in fine environments. No. 8, 6, 4, 9, 1 and 2 families were not sensitive to environment change, and they had stability of agronomy.