The Don-0 and Col-0 ecotypes of Arabidopsis thaliana showed significant phenotypic diversity for several quantitative traits. The phenotypic data taken on hybrid derived from Col-0 x Don-0 and parental lines provides the information of their continuous developmental pattern throughout the life cycle. The developmental data exhibits heterosis for most of the traits (specifically biomass related traits) due to supplementary genetic contributions of both parents. Consequently, the hybrid was found to be more vigorous in comparison to both the parents in terms of all the traits except yield trait. Moreover, higher and lower performance of hybrid causes due to constructive (hybrid vigor) and deleterious epistatic interactions of loci (necrosis: hybrid incompatibility), respectively. The present study also concluded that Don-0 is a slow growing, delayed flowering and high biomass containing ecotype. The shoot and root biomass at initial stage was found to be less in Don-0 than the Col-0 but high at maturity. The present investigation provides the preliminary information which could be utilized for future genetic studies to understand the heterotic phenomenon in Arabidospsis.

中文翻译：

---

拟南芥表型发育性状和杂种活力的评估

拟南芥的Don-0和Col-0生态型表现出明显的表型多样性的几个数量性状。从Col-0 x Don-0和亲本系获得的杂种的表型数据提供了它们在整个生命周期中连续发育模式的信息。由于父母双方的补充遗传贡献，发育数据显示出大多数性状（特别是生物量相关性状）的杂种优势。因此，发现杂种与两个亲本相比在除产量性状外的所有性状上都更有活力。此外，由于基因位点的建设性（杂种活力）和有害的上位性相互作用（坏死：杂种不相容），杂种的表现较高和较低。本研究还得出结论，Don-0是生长缓慢，开花延迟和含有高生物量的生态型。发现Don-0初期的茎和根生物量比Col-0少，但成熟时较高。本研究提供了初步信息，可用于将来的遗传研究，以了解杂种优势现象。拟南芥。