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作 者:叶金山[1] 孟伟[1] 谢青[1] 胡伟华[1] 杨文萍[1]
机构地区:[1]国家林业局泡桐研究开发中心,河南郑州450003
出 处:《西北林学院学报》2009年第1期66-70,81,共6页Journal of Northwest Forestry University
基 金:河南省自然科学基金项目(0611032600)
摘 要:本文从树木遗传学的角度进行了毛泡桐×白花泡桐和白花泡桐×毛泡桐正反交F1无性系自然接干性状遗传变异的比较研究。结果表明:(1)毛泡桐×白花泡桐和白花泡桐×毛泡桐正反交F1无性系自然接干性状的遗传变异在变异系数、变异模式、自然接干类型、自然接干优劣性、变异差异性、主成分结构、主成分贡献率、生长杂种优势、速生性、广义遗传力和遗传增益上都完全相同或基本相似而无本质差别。(2)接干高性状在影响和决定毛泡桐×白花泡桐和白花泡桐×毛泡桐正反交F1无性系自然接干性状的总体表现和最终状况上起着重要作用,而通直度性状是泡桐自然接干性状遗传改良的关键性状。(3)毛泡桐×白花泡桐和白花泡桐×毛泡桐正反交具有同等重要的杂交育种意义。(4)在泡桐的杂交育种、无性系育种、自然接干性状的遗传改良和多世代遗传改良中必须同等对待毛泡桐×白花泡桐和白花泡桐×毛泡桐而纠正过去长期只重视毛泡桐×白花泡桐而忽视白花泡桐×毛泡桐的杂交育种倾向。A comparative study was cartied out from tree geneticson natural stem-join character genetic variation of P. tomentosa (Thunb.)Steud. ×P. fortunei (Seem.)Hemsl. and P. fortunei (Seem.)Hemsl. × P. tomentosa (Thunb.) Steud. reciprocal cross F1 clones. The results were as follows: (1) The genetic variation of natural stem-join characters of P. tornentosa (Thunb.) Steud. × P. fortunei (Seem.) Hemsl. and P. fortunei (Seem.) Hemsl. × P. tornentosa (Thunb.) Steud. reciprocal cross Fx clones was com- pletey identical or broadly similar and had no essential distinction in coefficient of variation, variation model, natural stem-join type, superiority and inferiority of natural stem-join effects, variation difference characteristics, the structure of principal component, the contribution ratio of principal component, growth heterosis fast-growing properties, heritability in the broad sense (hB^2) and genetic gain (△G). (2) Height of stem-join played an important role in affecting and determining total display and ultimate condition of natural stem-join characters. Straightness of stem was a key character in genetic improvement of Paulow- nia natural stem-join characters. (3) P. tomentosa (Thunb.) Steud. × P. fortunei (Seem.) Hemsl. and P. fortunei (Seem.) Hemsl.× P. tornentosa (Thunb.) Steud. reciprocal cross had identically significant cross breeding meaning in Paulownia cross breeding. (4) P. tomentosa (Thunb.) Steud. × P. fortunei (Seem.) Hemsl. and P. fortunei (Seem.) Hemsl. × P. tornentosa (Thunb.) Steud. reciprocal cross must be treated with equal importance in Paulownia cross breeding, Paulownia clone breeding, genetic im- provement of Paulownia natural stem-join character and multiple generation genetic improvement of pau- lownia. Furthermore, the paper reminded Paulownia hybridologist to correct the cross breeding tendencies of neglecting P. fortunei (Seem.) Hemsl. × P. tomentosa (Thunb.) Steud. for a long t
关 键 词:毛泡桐×白花泡桐 白花泡桐×毛泡桐 自然接干性状 遗传变异 比较研究
分 类 号:S792.430.4[农业科学—林木遗传育种]
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