摘要
为了探讨孔雀草雄性不育系的应用价值,连续2a以孔雀草不育系BY为母本,以6个孔雀草自交系(K4、K8、K13、K15、K17、K30)与2个万寿菊自交系(9904、9906)为父本进行杂交,获得8个杂交组合,分析杂交后代的结实率、主要质量性状遗传规律和数量性状的杂种优势。结果表明:孔雀草种内杂交组合在2a中的结实率都较高,孔雀草和万寿菊种间杂交不亲和,杂交结实率低。孔雀草为父本时,杂交F1的花型由父本的花型决定,瓣型都为复瓣,花色偏橙红色系;万寿菊为父本时,花型、瓣型和花色都和母本孔雀草的不育性状相似,缺乏观赏性。综合评价各组合的观赏性状,BY×K17植株低矮、花大、花期长且结实率与发芽率较高,为优良的杂交组合;BY×K30、BY×K8组合分别由于花大和最佳观赏期长而具有较强的观赏价值。超父本优势分析表明,孔雀草种内杂交组合平均超父本优势值除花心直径为-0.64%外,其他性状都具有超父本优势。孔雀草和万寿菊种间杂交时,除花序直径外,其他性状的杂种优势变化取决于父本万寿菊的特性。
The male sterile line BY used as the female parent was crossed with six inbred lines of Tagetes patulaincluding K4,K8,K13,K15,K17,K30 and two Tagetes erectaincluding 9904 and 9906in two consecutive years to study the application potential of the male sterile plant.Seed setting rate,the main qualitative and quantitative traits of the eight crosses were investigated.The results showed that the seed setting rates and germination rates of intra-specific hybrids were relatively high in two years.The seed setting rate of hybrids between T.patulaand T.erecta was extremely low due to the cross incompatibility.When T.patula was used as male parent,flower type of hybrids was determined by the male parent with double petal form and flower color was partial to red and orange.When T.erecta was used as male parent,flower type,petal form and flower color were similar to the female parent.All were cylindrical,lack of appreciation.Comparing the mean value of main traits,BY×K17 was an excellent combination with low plant height,small leaf blade,large flowers,long viewing period,high seed setting rate and germination rate.Both BY×K30and BY×K8had a good view because of large flowers and long viewing period.The results of over male-parent heterosis showed that when T.patula was used as male parent,the heterosis of other traits were positive except that of flower diameter(-0.64%).when T.erecta was used as male parent,the heterosis of other traits was based on characteristic of male parent except that of diameter of inflorescence.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2016年第4期29-35,共7页
Journal of Huazhong Agricultural University
基金
国家自然科学基金项目(31201647)
中央高校基本科研业务费专项(2013PY081)
关键词
孔雀草
万寿菊
雄性不育系
自交系
优势育种
Tagetes patula
Tagetes erecta
male sterile line
inbred line
heterosis breeding
