观赏海棠杂交育种花色早期定向选择研究  

Early Directional Selection Color of Ornamental Crabapples Cultivars

作　　者：孙凡雅[1] 沈向[1] 束怀瑞[1] 李晓磊[1] 王庆菊[1] 王磊[1] 康鸾[1] 

机构地区：[1]山东农业大学园艺科学与工程学院/作物生物学国家重点实验室,山东泰安271018

出　　处：《中国农业科学》2008年第9期2748-2754,共7页Scientia Agricultura Sinica

基　　金：山东省农业良种产业化开发项目重大课题(鲁农良种字[2005]10号);科技部农转资金项目(03EFN213700156);山东省科学发展计划项目(2007GG20009013)

摘　　要：【目的】找出观赏海棠杂交育种早期定向选择的方法,解决杂交中存在的育种费用大、效率低等问题。【方法】根据父本木质部与其花瓣、果皮中的花色苷含量的数量关系,利用这种相关性预测杂交实生苗的花色与果色,以便在童期进行预选。【结果】父本花瓣与木质部花色苷含量间存在显著相关性,4月份时相关系数最大(r=0.933),因此建立4月份木质部(y)与花瓣(x)花色苷含量间的数学模型y=1.9391x+312.41,利用已开花的M.‘Pink Spire’的红花杂交后代检验数学模型,预测值与实际花瓣中花色苷含量的差值均不超过4%。对杂交群体进行遗传分析发现除M.‘Pink Spire’的杂交群体外,其余7个杂交群体的遗传力均≥52.43%,并且木质部花色苷含量的遗传属于数量遗传。对父本进行分析结果表明,以红艳花色为育种目标时,以M.‘Red Splender’品种的观赏海棠作为父本的杂交结果较之其它品种更佳。【结论】利用木质部花色苷含量对杂交后代花色、果色进行预选具有可行性。[Objective] Find a method for early directional selection of ornamental crabapples in order to figure out the hybridization problems of high cost and low efficiency in breeding. [Method] According to quantitative relation between xylem and its flower and fruit peel of male parent, forecast the crossbred seedlings＇ flower and fruit color. [Result] There is a very significant correlation between flower color and xylem anthocyanin content in April （r=0.933）. With anthocyanin content of April xylem （y） and flower （x）, a regression equation y=l.9391x＋312.41 was established, and M. Pink Spire combination＇s secondary year F1 generation was used breeding to test the equation, the discrepancies were less than 4%. The genetic analysis showed h^2≥52.43% except cross combination of M. Pink Spire. Anthocyanin content in xylem inherit is quantitative inheritance. The analytical result indicates that M. Red Splender cultivar is a better male parent variety for colour selection breeding. [Conclusion] Using anthocyanin content of xylem to select flower and fruit colour is feasible.

关 键 词：观赏海棠 杂交 木质部 花色苷 早期定向选择 

分 类 号：S685.99[农业科学—观赏园艺]