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目的 探索桔梗种质遗传基础 ,培育桔梗新品种。方法 不同桔梗种质杂交后观察。结果 桔梗人工授粉的合适时期为花开放、柱头裂开 ,去雄后 5～ 6 d。发现了桔梗新的花色类型 -粉花型。在紫花 (♀ )×白花 ( )和白花 (♀ )×粉花 ( )两个杂交组合的当代种子 (F0 )发现新颜色类型种子 -黄绿色、灰绿色种子及杂色种子 (颜色嵌合 ) ,而且在同一杂交果实内有不同颜色种子。结论 桔梗花色和种色存在新的变异与分离 ,花色和种色有一定的相关性。种子颜色分离没有规律性比例关系 ,其分离与遗传不符合种皮由珠被形成的一般规律 ,较复杂。其自身遗传机制及和花色遗传的相互关系 ,以及不同花色类型之间的遗传关系尚需进一步的研究。
Objective To explore the genetic basis of Platycodon grandiflorum germplasm and cultivate new varieties of Platycodon grandiflorum. Methods Different germplasms of Platycodon grandiflorum were observed after crossing. Results The suitable period of artificial pollination for flowering bellflower was flower opening, stigma dehiscence, and 5 to 6 days after castration. A new type of flower color was found in the Platycodon grandiflora - a pink flower pattern. In the contemporary seeds (F0) of the hybrid combinations of purple flower (♀) × white flower () and white flower (♀) × pink flower (), new color type seeds were found - yellow-green, gray-green seeds, and variegated seeds (color mosaic) , And there are different color seeds in the same hybrid fruit. Conclusion There is a new variation and separation in the flower color and color of the balloon flower. There is a certain correlation between flower color and color. Seed color separation has no regular proportional relationship, its separation and heredity do not conform to the general rules of seed coat formation from bead and are more complex. The relationship between their own genetic mechanisms and the genetics of their color, and the genetic relationship between different flower color types still need further study.