Altered Expression of an FT Cluster Underlies a Major Locus Controlling Domestication-Related Changes to Chickpea Phenology and Growth Habit

Frontiers in Plant Science

卷:10

Teresa Millan¹  Noelia Carrasquilla-Garcia²  Douglas R. Cook²  R. Varma Penmetsa³  Reyazul Rouf Mir⁴  Josefa Rubio⁵  Valerie F. G. Hecht⁶  Raul Ortega⁶  James L. Weller⁶  Jules S. Freeman⁷ 

[1] Department of Genetics ETSIAM, University of Córdoba, Córdoba, Spain;

[2] Department of Plant Pathology, University of California, Davis, Davis, CA, United States;

[3] Department of Plant Sciences, University of California, Davis, Davis, CA, United States;

[4] Division of Genetics and Plant Breeding, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India;

[5] E. Genomica y Biotecnologia, Instituto Andaluz de Investigación y Formación Agraria y Pesquera (IFAPA), Córdoba, Spain;

[6] School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia;

[7] Scion, Rotorua, New Zealand;

关键词: chickpea;    domestication;    florigen;    flowering;    growth habit;    legume;   

DOI  :  10.3389/fpls.2019.00824

来源: DOAJ

【 摘 要 】

Flowering time is a key trait in breeding and crop evolution, due to its importance for adaptation to different environments and for yield. In the particular case of chickpea, selection for early phenology was essential for the successful transition of this species from a winter to a summer crop. Here, we used genetic and expression analyses in two different inbred populations to examine the genetic control of domestication-related differences in flowering time and growth habit between domesticated chickpea and its wild progenitor Cicer reticulatum. A single major quantitative trait locus for flowering time under short-day conditions [Days To Flower (DTF)3A] was mapped to a 59-gene interval on chromosome three containing a cluster of three FT genes, which collectively showed upregulated expression in domesticated relative to wild parent lines. An equally strong association with growth habit suggests a pleiotropic effect of the region on both traits. These results indicate the likely molecular explanation for the characteristic early flowering of domesticated chickpea, and the previously described growth habit locus Hg. More generally, they point to de-repression of this specific gene cluster as a conserved mechanism for achieving adaptive early phenology in temperate legumes.

【 授权许可】

Unknown