華南農(nóng)業(yè)大學(xué)學(xué)報(bào) |
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鐘偉華 石斌 周達(dá) 黃永權(quán) 張民興 張民興 摘 要:對火炬松原產(chǎn)地耐寒與一般兩類基因資源林的生長表現(xiàn)研究結(jié)果表明,前者保存率高,適應(yīng)性強(qiáng),生長均勻,差異不顯著;后者則相反,保存率較低,生長優(yōu)劣懸殊,差異顯著,優(yōu)于我國早年引入的種批,為重要的遺傳改良資源,其中有10個(gè)編號較優(yōu)良,它們多產(chǎn)自美國東南沿海,尤其是墨西哥灣各州.在31.3%入選率下,材積相對遺傳增益大20.84%;2~5株小樣求得的生長早-晚相關(guān)趨勢與前人研究一致,唯確定程度略低. Growth Performance of the Loblolly Pine Genetic Resources ZHONG Wei-hua(College
of Forestry, South China Agric. Univ., Guangzhou 510642, China) Abstract:This
paper studied the growth performance of loblolly pine gene resources
with in cold-hardy and regular provenances. The results indicated that
the cold-hardy gene resources showed higher survival rate, better
adaptability and uniformity in growth and without significant
difference. The regular gene resources were the contrary, with lower
survival rate, great variation in growth and significant difference
among seed sources. The growth performance was superior to that of the
early introduced loblolly pine seed lots in China. These provenances are
the important genetic resources for tree improvement. Among these gene
resources there were 10 superior numbers from the southeast coastal
states in the U.S.A., especially those from the Mexican Bay States.
Under 31.3% selection rate, the relative genetic gain was 20.84%. The
juvenile-mature growth correlation trend derived from small samples of 2~5
trees, was in accordance with the former researches, only with a
slightly lower the determination coefficient. |
基金項(xiàng)目:“七五”國家重點(diǎn)科技攻關(guān)(75-07-01-38);廣東省科委重點(diǎn)課題;聯(lián)合國發(fā)展計(jì)劃署項(xiàng)目(CPR/91/153) 作者簡介:鐘偉華(1927-),男, 教授. 作者單位:鐘偉華(華南農(nóng)業(yè)大學(xué)林學(xué)院, 廣東 廣州 510642) 石斌(華南農(nóng)業(yè)大學(xué)林學(xué)院, 廣東 廣州 510642) 周達(dá)(華南農(nóng)業(yè)大學(xué)林學(xué)院, 廣東 廣州 510642) 黃永權(quán)(廣東省林業(yè)廳種苗站, 廣東 廣州 510173) 張民興(廣東省林業(yè)廳種苗站, 廣東 廣州 510173) 李遠(yuǎn)球(英德市火炬松種子園, 廣東 英德 513000) 參考文獻(xiàn): [1]王明庥. 林木育種學(xué)概論[M]. 北京:
中國林業(yè)出版社,1989. 184-190. 收稿日期:2000年3月21日 出版日期:2001年1月1日 |