摘要
对中国 12个产地 50个银杏品种主要经济性状进行遗传分析和多性状选择。分析结果表明 ,最大单核质量为 3.89g ,出核率 33.58% ,出仁率 82 .4 9%。单核质量遗传力为0 .9759。核形系数和单核质量间的rG 达 0 .9986,单果质量对单核质量的直接遗传PY·i达1.4 0 7。全国 12个种源可以分成 4大类。采用指数选择或直接选择法优化出 3个核用品种。
China possesses more than 70% ginkgo resources in the world.The primary problems existing in ginkgo cultivation are:(1)no big grain and fine nucleus used cultivars;(2)no known genetic law of primary characters ginkgo seed.The purposes of this research are to collect 50 nucleus used cultivars from 12 provinces in China,to carry out genetic analysis for economical character and multiple character selection on ginkgo seed.The results of analysis show that maxmum single nucleus weight,stone mass/fruit mass(%)and kernel mass/stone mass(%)are 3.89g, 33.58% and 82.49%, respectively.The heritability( h 2 )of single nucleus mass is 0.9759.The genetic correlation coefficient( r G )between nucleus shape coefficient and single nucleus mass,and direct genetic path coefficient( P Y·i )of single fruit mass to single stone mass are 0.9986 and 1.407,respectively.Twelve provenances from China are divided into four classes.Three fine nucleus used cultivars are selected out through index or direct selection methods from fifty nucleus used cultivars in China.The theory of nucleus used cultivar selection was studied in this paper.
出处
《园艺学报》
CAS
CSCD
北大核心
2001年第3期223-229,共7页
Acta Horticulturae Sinica
基金
山东省科委"九五"项目! (96 10 30 80 2 )
