Independent selection for seed free tryptophan content and vernalization response in chickpea domestication

Ruth P. van-Oss, Avi Gopher, Zohar Kerem, Zvi Peleg, Simcha Lev-Yadun, Amir Sherman, Hong Bin Zhang, George Vandemark, Clare J. Coyne, Ofer Reany, Shahal Abbo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Chickpea shows a distinct domestication trajectory vis-a-vis pod dehiscence and growth cycle mediated by vernalization insensitivity compared with its companion Near Eastern legumes. Our objectives were: (i) to map the quantitative trait loci (QTLs) associated with vernalization response and seed free tryptophan in domesticated × wild chickpea progeny and (ii) estimate the genetic correlation between vernalization response and free tryptophan content. A domesticated × wild chickpea cross was used to document phenotypic segregation in both traits and to construct a skeletal genetic map for QTL detection. A number of vernalization response and seed free tryptophan content QTLs were documented in both F2 and F3 generations. No significant genetic correlation between these two traits was observed. Epistatic relationship between two free tryptophan loci was documented. It is evident that selection for high seed tryptophan is easier to accomplish relative to selection for vernalization insensitivity. This suggests that the two traits were selected independently in antiquity, thereby corroborating earlier claims for conscious selection processes associated with chickpea domestication.

Original languageAmerican English
Pages (from-to)290-300
Number of pages11
JournalPlant Breeding
Volume137
Issue number3
DOIs
StatePublished - Jun 2018

Bibliographical note

Funding Information:
This research was supported in part by Research Grant No. IS-4427-11C from BARD, the United States—Israel Binational Agricultural Research and Development Fund. Shahal Abbo is the incumbent of the Jacob and Rachel Liss Chair in Agronomy, The Hebrew University of Jerusalem.

Publisher Copyright:
© 2018 Blackwell Verlag GmbH

Keywords

  • Cicer arietinum
  • Cicer reticulatum
  • conscious selection
  • crop evolution
  • nutritional quality

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