墨西哥柏52个优树自由授粉子代遗传测定

对52个墨西哥柏优树自由授粉家系进行子代测定,结果表明:墨西哥柏速生,10年生树高、胸径、材积、冠幅年均生长量分别为1.04 m,1.43 cm,0.009 6 m3和0.22 m;生长性状和结实性状家系间差异达显著水平,树高、胸径、材积、冠幅、结实量家系遗传力分别为0.76,0.66,0.68,0.74和0.65,单株遗传力分别为0.27,0.16,0.18,0.23和0.16;生长性状和结实性状呈显著的负相关,选择了9个优良家系,22个优良单株,其材积遗传增益平均为13.47%和25.20%;对墨西哥柏10年生的生长规律进行了分析.

Progeny Test on 52 Openly- pollinated Families of Cupressus lusitanica

Progeny test was carried out for 52 openly-pollinated families of Cupressus lusitanica.The results showed that Cupressus lusitanica grew rapidly in the experimental area.The average yearly growth rates of height,DBH,standing volume,crown diameter of 10-year-old plantation were 1.04 m,1.43 cm,(0.009 6 m~3/hm~2) and 0.22 m respectively.There were significant differences in the tested growth traits and fruiting characteristics among the families.The family heritability of height,DBH,standing volume,crown diameter and seed yield indices was 0.76,0.66,0.68,0.74 and 0.65 respectively.The individual heritability of the same indices was 0.27,0.16,0.18,0.23 and 0.16 respectively.There was significant negative correlation between the growth traits and fruiting properties.9 superior families and 22 outstanding individual plants were selected,whose average genetic gain value for standing volume was between 13.47% and 25.20%.The growth rhythm of 10-year-old Cupressus lusitanica plantation was also analyzed.