Early directional selection color of ornamental crabapples cultivars
2008
Sun Fanya | Shen Xiang | Shu Huairui
chinois. 【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。
Afficher plus [+] Moins [-]anglais. [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. ≥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.
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