两种朱顶红杂交育种及后代花型分析

为了进一步提高朱顶红观赏价值,并为其花型优异性状的选育研究提供理论参考,实验选用花朱顶红和朱顶红品种蕊罗娜为亲本,进行人工杂交授粉。研究结果表明:两亲本具有较高亲和性,平均结实率达到92.2%,种子播种10天后开始萌发,萌发率达到91.1%;幼苗生长中,施用400×的花多多(15:15:15)可使小苗鳞茎生长最快,生长20个月后可开花,F1代种球只抽出一支花箭的比例高达61.1%,花葶高度为21.2~68.9cm,分离广泛,高度处于正常值占比48%,粗度在正常值范围内占比72%;每个种球盛开3~11朵花不等,花期长达1个多月,椭圆形花瓣占比52.8%,圆形花瓣47.2%;后代发生性状分离花色不一,其中红色条纹清晰或模糊、暗红色条纹清晰的花具有高观赏性。从花葶高度和粗度、每个种球花朵盛开数量、花期时长、花朵颜色和花瓣形状分析,杂交F1代综合两亲本的花朵特性,遗传了父本蕊罗娜白色花色和钝圆花瓣,具有植物生长健壮和观赏性高的特性。

Test on Indica-compatibility of Candidate Indicacompatible Japonica Lines in Rice

[Objective] The aim was to breed the indica-compatible japonica lines（ICJLs）.[Method] The indica-compatibility of 5 candidate ICJLs were tested based on the pollen fertility and spikelet fertility of F1 hybrids with 6 indica testers,6 japonica testers and 6 middle testers.[Result] Candidate ICJL G2123,G2417,G2410 and G3005 were grouped into the exceptionally（Specific）indica-compatible lines based on their high indica-compatibility and low japonica-compatibility.Candidate ICJL G2615 was grouped into the non-compatible lines on their low indica-compatibility and low japonica-compatibility.[Conclusion] The testers,fertility identification standards,test methods of pollen fertility and spikelet fertility were discussed when the compatibility of CICJLs was tested.The reason of the indica-compatibility in G2417 was analyzed.