鐘偉華　 石斌　 周達(dá)　 黃永權(quán)　 張民興　 張民興　

摘　要：對(duì)火炬松原產(chǎn)地耐寒與一般兩類基因資源林的生長(zhǎng)表現(xiàn)研究結(jié)果表明，前者保存率高，適應(yīng)性強(qiáng)，生長(zhǎng)均勻，差異不顯著；后者則相反，保存率較低，生長(zhǎng)優(yōu)劣懸殊，差異顯著，優(yōu)于我國(guó)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(hào)較優(yōu)良，它們多產(chǎn)自美國(guó)東南沿海，尤其是墨西哥灣各州.在31.3％入選率下，材積相對(duì)遺傳增益大20.84％；2～5株小樣求得的生長(zhǎng)早-晚相關(guān)趨勢(shì)與前人研究一致，唯確定程度略低.
關(guān)鍵詞：火炬松；基因資源；生長(zhǎng)表現(xiàn)；遺傳增益；早-晚相關(guān)
分類號(hào)：S722.83　文獻(xiàn)標(biāo)識(shí)碼：A
文章編號(hào)：1001-411X (2001) 01-0013-05

Growth Performance of the Loblolly Pine Genetic Resources

ZHONG Wei-hua（College of Forestry, South China Agric. Univ., Guangzhou 510642, China）　
SHI Bin（College of Forestry, South China Agric. Univ., Guangzhou 510642, China）　
ZHOU Da（College of Forestry, South China Agric. Univ., Guangzhou 510642, China）　
HUANG Yong-quan（Seed and Seedling Station of the Department of Forestry, Guangdong Province, Guangzhou 510173, China）　
ZHANG Min-xing（Seed and Seedling Station of the Department of Forestry, Guangdong Province, Guangzhou 510173, China）　
LI Yuan-qiu（Yingde Loblolly Pine Seed Orchard， Yingde 513000， 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.
Keywords：loblolly pine； genetic resources； growth performance； genetic gain； juvenile-mature growth correlation

出版日期：2001年1月1日