Plant Molecular Biology Reporter

, Volume 36, Issue 4, pp 576–587 | Cite as

Variance, Inter-Trait Correlation, Heritability, and Marker-Trait Association of Rubber Yield-Related Characteristics in Taraxacum kok-saghyz

  • Zinan Luo
  • Brian J. Iaffaldano
  • Xiaofeng Zhuang
  • Jonathan Fresnedo-Ramírez
  • Katrina CornishEmail author
Original Paper


Rubber dandelion (Taraxacum kok-saghyz or TK) is a potential industrial crop species that can produce high-quality natural rubber in its roots. The present study estimated trait variance, inter-trait correlation, and entry-mean heritability for rubber yield-related traits and analyzed associations between these traits and 42 single-nucleotide polymorphism (SNP) markers. A trial was conducted at three environments to assess a biparental progeny of 66 F1 full-sibs, in a randomized complete block design (RCBD) with two replicates. Significant correlations, broad ranges of variation, and significant genotypic variance components were identified for five measured phenotypic traits. Moderate broad-sense heritability on an entry-mean heritability estimates (0.51–0.61) were obtained for five rubber yield-related traits based on a 1-year trial. However, the broad-sense heritability in general sense ranged from 0.09 to 0.15 depending on the trait. Two linkage groups were identified. Association analysis identified seven significant marker-trait gene associations, and only one marker was related to two traits. The implications of trait correlations and heritability for selection and improvement are discussed.


Heritability Inter-trait correlation Genotypic variance Phenotypic variance KASP Linkage group Marker-trait association analysis 



This work was supported by the Center for Applied Plant Sciences (CAPS), the College of Food Agricultural and Environmental Sciences, The Ohio State University, and USDA National Institute of Food and Agriculture (Hatch project 230837). We are also grateful for the funding from the OARDC SEEDS grant program. This research is part of the requirements for the Ph.D. project for Zinan Luo at The Ohio State University. We also thank Sarah K. McNulty and Niki Amstutz for taking care of the plants.

Supplementary material

11105_2018_1097_MOESM1_ESM.xlsx (28 kb)
ESM 1 (XLSX 27 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Horticulture and Crop ScienceThe Ohio State UniversityWoosterUSA

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