摘要
马尾松５个种源插穗生根性状存在显著差异。从生根时间、生根率、生根性状分析和根系效果指数分析，认为广西宁明种源属扦插繁殖优良种源，江西吉安种源较差。广东韶关种源虽从根系效果指数分析属较优种源，但腐烂严重。而生根能力较差种源的生根性状离散度大，意味着种源内开展单株选择的潜力大。同种源生根能力最强无性系比最差无性系生根率高３３３％。马尾松插穗生根性状的相关分析表明，根系总长度与最长不定根粗度有极显著相关关系（ｒ＝０．９３１４），不定根数与侧根数具显著负相关。
Variation of cutting rooting ability on masson pine ( Pinus massoniana Lamb.)among five provenances was studied. The time for callusing and rooting of cuttings from Ningming provenance Guangxi Province was the shortest,and Jiangning of Jiangsu and Ji'an of Jiangxi was the longest. Cuttings from Shaoguan of Guangdong Province was seriously rotted though the root effective index was high.The root rate of cuttings from Ningming provenance got up to eighty percent and Ji'an was thirty four percent. The result of variance on the cutting rooting characters showed that the root rate (F=15.255),the sum of adventitious roots (F=6.445),the sum of branch roots (F=4.006),the lenght of the longest root (F=13.170) and the total length of the roots (F=10.422) were notable. These all meant that the variation of rooting characters on the level of provenance was notable. According to the analysis on the time for rooting, root rate,rooting characters and the root effective indexes,cuttings from Ningming provenance was the best for cutting rooting and Ji'an was the worst. However,the potentiatlities of individual selection in Ji'an was large as the dispersion was the largest.Therefore,cuttings from ten ortets in Ji'an provenance were studied. All the cuttings were treated with root_inducing material compouned by the author. The result of the analysis on root characters showed, the clonal selection on individual level was also effective,No.3 was the best ortet and No.9 was the worst,and with the treatmeant of root_inducing material,the rooting rate was raised from thirty four percent to seventy point one percent.For this reason,to exploit the root_inducing and anti_rotting material and find best rooting enviornment condition for the clonal forestry on root_difficulty spieces was necessary and feasible. The correlation between the total length of adventitious roots and the diameter of the longest root was closest (r=0.9314),but the sum of the adventitious roots and branch roots negatively correlated (r=-0.3687).Consequently, to avoid the blindness, it was necessary to decide the characters as the target of selection.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
1998年第3期66-70,共5页
Journal of Nanjing Forestry University：Natural Sciences Edition
关键词
马尾松
插穗
生根
变异
Masson pine cutting
Rooting character
Variation
