Dynamic changes in the genetic parameters of growth traits with age and their associations with heterosis in hybrid Liriodendron

Xia, Hui; Si, Weijie; Hao, Ziyuan; Zhong, Weiping; Zhu, Shenghua; Tu, Zhonghua; Zhang, Chengge; Li, Huogen

doi:10.1007/s11295-021-01504-z

Cited by 4 publications

(2 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The progeny test materials were derived from the offspring of 25 combinations generated by interspecific hybridization using a partial diallel cross of 14 parents (five L. tulipifera and nine L. chinense ) screened from a provenance trial plantation. Detailed information on the plantation is provided in our previous study (Xia et al., 2021). The partial diallel cross design is shown in Table S4.…”

Section: Methodsmentioning

confidence: 99%

“…As a result of the biological characteristics of Liriodendron , cross‐breeding is the main technique applied for its improvement (Ji & Wang, 2001), with the majority of the current Liriodendron breeding populations comprising artificial populations. Previous studies have revealed abundant intraspecific and interspecific genetic divergence and variation in these two species, which results in rich genetic diversity in their interspecific hybrid progenies (Shen et al., 2022; Wang, 2003; Xia et al., 2021; Zhang et al., 2011; Zhu & Li, 2010). In particular, the hybrid offspring of multiple parents from various provenances exhibit large differences in phenotypic variation and growth processes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Genome‐wide association study of multiyear dynamic growth traits in hybrid Liriodendron identifies robust genetic loci associated with growth trajectories

et al. 2023

Self Cite

View full text Add to dashboard Cite

SUMMARYThe genetic factors underlying growth traits differ over time points or stages. However, most current studies of phenotypes at single time points do not capture all loci or explain the genetic differences underlying growth trajectories. Hybrid Liriodendron exhibits obvious heterosis and is widely cultivated, although its complex genetic mechanism underlying growth traits remains unknown. A genome‐wide association study (GWAS) is an effective method for elucidating the genetic architecture by identifying genetic loci underlying complex quantitative traits. In the present study, using a GWAS, we identified robust loci associated with growth trajectories in hybrid Liriodendron populations. We selected 233 hybrid progenies derived from 25 crosses for resequencing, and measured their tree height (H) and diameter at breast height (DBH) for 11 consecutive years; 192 972 high‐quality single nucleotide polymorphisms (SNPs) were obtained. The dynamics of the multiyear single‐trait GWAS showed that year‐specific SNPs predominated, and only five robust SNPs for DBH were identified in at least three different years. Multitrait GWAS analysis with model parameters as latent variables also revealed 62 SNPs for H and 52 for DBH associated with the growth trajectory, displaying different biomass accumulation patterns, among which four SNPs exerted pleiotropic effects. All identified SNPs also exhibited temporal variations in effect sizes and inheritance patterns potentially related to different growth and developmental stages. The haplotypes resulting from these significant SNPs might pyramid favorable loci, benefitting the selection of superior genotypes. The present study provides insights into the genetic architecture of dynamic growth traits and lays a basis for future molecular‐assisted breeding.

show abstract

Section: Methodsmentioning

confidence: 99%