摘要
山西是油松种子区的中部区,也是周边省份的主要供种来源,本文在田间试验基础上对主要来自该种子区的23个天然林分21年子代植株的生长性状进行了测定。结果表明:树木生长在林分子代间差异极显著;山西油松天然分布具有地理区域性和山系区域性特点,区域内林分子代表现相对一致,区域间差异显著;区域林分子代生长量由大到小的地理区排序为中部区、南部区和北部区,按山系排序为关帝山、太岳山、中条山、吕梁山、太行山和管涔山,而与对林分当代调查结果不同;根据林分子代生长表现选出6个优良林分。建议加强对优良天然林分的保护,建设采种基地和用于高改良轮育种。
Shanxi Province is both the central distribution area of Pinus tabuliformis and the major seed sources for surrounding provinces. In this paper, genetic variations of growth traits in 21-year-old progeny tests of 23 natural stands mainly from Shanxi provenance of P. tabuliformis were investigated. The results showed that variations in growth traits among progeny tests of 23 natural stands were highly significant. Natural distribution of P. tabuliformis in Shanxi Province exhibited a feature of geographic regionalization and mountainous regionalization. Similar performance in growth traits of stand progenies within the same mountain region, but highly different among mountain regions were observed. In order of descending of progeny growth of 23 stands in different geographic regions, it went as middle region, south region and north region. While in different mountain regions, it went as Guandi Mountain region, Taiyue Mountain region, Zhongtiao Mountain region, Ltiliang Mountain region, Taihang Mountain region and Guancen Mountain region, which were different from the stand growth determination in situ. Growth of progenies in 6 selected elite stands was much higher than stand progeny in testing region. Conserving elite natural stands, developing seed stands for improvement would be facilitated for afforestation of P. tabuliformis in testing regions.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2014年第3期104-109,共6页
Journal of Beijing Forestry University
基金
林业公益性行业科研专项(201104022)
国家林业局六大林业重点工程专项(L--007)
关键词
油松
天然林
子代测定
遗传变异
选择
Pinus tabuliformis
natural stand
progeny testing
genetic variation
selection
