木荷种源苗期生长性状地理变异及遗传参数估算

Geographic Variations and Estimate of Genetic Parameters for Seed and Growth Traits in Schima suoerbaProvenance at Seedling Stage

对采自6省(区)37个木荷种源种子进行了苗期试验,结果表明,木荷种子千粒重、室内发芽率存在明显地理种源变异,木荷种源间苗高、地径、生物量有着极显著的生长差异,且有较高的广义遗传力。木荷苗高生长以8～9月份为速生期,这时期的生长占年生长的50%～56%,苗高和地径生长与纬度呈极显著负相关。说明,通过木荷种源选择,能取得较好的效果。并初步筛选出广东开平、阳山、韶关,福建华安,江西上犹等苗期生长表现突出的种源。

The seedling provenance trial of Schima suoerba containing 37 seedlots collected from 6 provinces (zone) was conducted in Dexing, Anfu and Xinfeng Counties, Jiangxi Province. The results showed there were very significant differences in weight per 1 000 seeds,laboratory seed germination,seedling height, ground diamater and biomass of Schima suoerba provenance, and broad heritability of seedling traits were hight. The seedling height growth of Schima suoerba provenance displayed quick growing period in August and September, height increment was more than 50% of the total height increment. The seedling height and ground diamater were even negative related to the latitude of the seedlots. 5 quick-growing provenances have been selected among the seedlings, they are Kaiping, Yangshan, Shaoguan, Hua'an and Shangyou.