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Vernalization response of domesticated × wild chickpea progeny is subject to strong genotype by environment interaction
Author(s) -
Pinhasi vanOss Ruth,
Sherman Amir,
Zhang HongBin,
Vandemark George,
Coyne Clarice,
Abbo Shahal
Publication year - 2016
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12325
Subject(s) - vernalization , biology , domestication , genotype , allele , botany , genetics , photoperiodism , gene
Vernalization insensitivity is a key feature of domesticated chickpea, and its genetic basis is not well understood. We studied vernalization response among hybrid progeny derived from two domesticated × wild crosses. The wild parents are vernalization‐sensitive, late‐flowering genotypes while both domesticated parents are vernalization insensitive. Parental lines and hybrid progeny were tested with (28 days at 4°C) and without vernalization (control). The difference in mean days to flower (∆ DTF ) between control and vernalization treatments was used to assess the flowering vernalization response. A wide range of ∆ DTF values was observed among the hybrid progeny. Strong genotype by environment interaction effect on ∆ DTF was observed for the parental accessions and hybrid progeny. We used the ∆ DTF values to select vernalization responsive and non‐responsive progeny lines. However, the genotype × environment interaction strongly interfered with our selection. Chickpea breeders interested in using the wild progenitor as a donor of exotic traits should be aware of the possibility of introducing vernalization response alleles that may alter the phenology of their breeding materials in an unpredictable manner.

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