桔梗雄性不育种质的杂种优势初探

Preliminary Research of the Heterosis of Male Sterility Germplasm Resources of the Platycodon grandiflorum

为了探讨桔梗雄性不育种质的利用前景,将供试的桔梗雄性不育材料与10个正常可育材料杂交,获得10个组合的F1,对F1及P1和P2分析株高等8个主要农艺性状杂种优势。结果表明:杂种优势在各组合间及各性状间有很大的差异,杂种优势最高组合8个性状的平均优势为49.40%;最小组合为13.60%;10个组合平均杂种优势最高的性状是单根鲜重,为41.80%,最小的性状是主根长,为18.05%;2个性状间杂种优势的相关性达到极显著水平的有株高与茎粗、茎部鲜重与侧根数,达到显著水平的有株高和根长、株高与侧根数、单根鲜重与茎粗以及单根鲜重与侧根数。该研究旨在为杂种优势在桔梗生产中的利用提供参考依据。

In order to investigate the prospects of Platycodon grandiflorurn on male sterility germplasm resources, Platycodon grandiflorum male sterility material will be available for hybridization materials with 10 normal fertile materials,obtaining 10 combinations of F1, through the analyzed of F1 and Pl and Pz on 8 main plant heterosis agronomic traits. The results showed that the average dominance value of the 8 traits from the combination owning the highest heterosis was 49.40%, the smallest was 13.60%. The trait of the highest average heterosis of the 10 combinations was fresh weight of a single root, for 41.80%;the smallest trait was the length of the taproot, for 18.05% ,heterosis correlationship reaching highly significant between the two traits included the level of a plant height and stem diameter, stem fresh weight and number of lateral, associated with significant levels, there were plant height and root length, plant height and lateral root number, fresh weight of single root and stem diameter, single root fresh weight and lateral root numbers. The research would provide the regard to the production of heterosis utilization in Platycodon grandi florurn.