【摘要】 为探究杉木(Cunninghamia lanceolata)二代种子园不同无性系种实生长的变异规律,以22个无性系为试验材料,对9个种实主要产量和质量评价指标开展研究。结果表明,杉木种实产量和质量在无性系间差异均极显著,各指标间均存在一定相关性。杉木球果产量、球果长、果形指数、球果宽、种子产量、优良度、发芽率、千粒重、涩粒率均值分别为1.71 kg、27.27 mm、1.12、24.40 mm、0.16 kg、73.88%、35.21%、7.01 g、19.45%。聚类结果表明,在欧式距离为13时,参试22个无性系被分为4类,类群Ⅰ杉木种实表现最优,包括8个无性系ED4、ED14、ED3、ED8、ED19、ED17、ED16和ED12;此类杉木无性系球果产量、球果长、果形指数、球果宽、种子产量、优良度、发芽率、千粒重和涩粒率均值分别为1.86 kg、28.50 mm、1.10、25.84 mm、0.18 kg、74.67%、47.50%、8.273 g和18.42%。球果、种子的产量和质量性状可作为杉木种质筛选的重要指标,选择出的优良无性系为参试杉木的最优种质。更多还原

【Abstract】 In order to explore the variation law of seed growth of different clones in the second-generation seed orchard of Cunninghamia lanceolata,22 clones were used as experimental materials to study the main yield and quality evaluation indexes of 9 varieties.The results showed that there were significant differences in seed yield and quality among clones,and there was a certain correlation between each index. The average cone yield,cone length,cone width,fruit shape index,seed yield,excellent degree,germination rate,1 000-grain weight and astringency rate of Cunninghamia lanceolata were 1.71 kg,27.27 mm,1.12,24.40 mm,0.16 kg,73.88%,35.21%,7.01 g and 19.45%,respectively. Cluster analysis showed that 22 clones were divided into 4 groups at 13 euclidean distances. Group I had the best performance,including 8 clones ED4,ED14,ED3,ED8,ED19,ED17,ED16 and ED12. The average cone yield,cone length,cone width,fruit shape index,seed yield,excellent degree,germination rate,1000-grain weight and astringency rate of these clones were 1.86 kg,28.50 mm,1.10,25.84 mm,0.18 kg,74.67%,47.50%,8.273 g and 18.42%,respectively.The yield and quality traits of cone and seed can be used as an important index for germplasm selection of Cunninghamia lanceolata.The excellent clones were selected as the optimal germplasm materials of Cunninghamia lanceolata.更多还原