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Journal of Heredity Advance Access originally published online on January 4, 2006
Journal of Heredity 2006 97(1):55-61; doi:10.1093/jhered/esj009
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© The American Genetic Association. 2006. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Inheritance of Time to Flowering in Chickpea in a Short-Season Temperate Environment

Y. Anbessa, T. Warkentin, A. Vandenberg, and R. Ball

From the Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada S7N 5A8

Address correspondence to Yadeta Anbessa at the address above, or e-mail: yadeta.kabeta{at}usask.ca.

Time to flowering is central in determining the adaptation and productivity of chickpea in short-season temperate environments. We studied the genetic control of this trait in three crosses, 272-2 x CDC Anna, 298T-9 x CDC Anna, and 298T-9 x CDC Frontier. From each cross, 180 F2 plants and parents were evaluated for time to flowering under greenhouse conditions. In summer 2004, multiple generations including P1, F1, P2, F2, and F2:3 (also called MG5) were evaluated for time to flowering under field conditions. The data on time to flowering in the F2 populations were continuous in distribution but deviated from normal distribution. The F2:3 families derived from this showed a bimodal distribution for time to flowering, a typical case of major-gene inheritance model with duplicate recessive epistasis. A joint segregation analysis of MG5 also revealed that time to flowering in chickpea was controlled by two major genes along with other polygenes. Late flowering was dominant over early flowering for both major genes with digenic interaction between them, mainly an additive x additive type. This information can be used to formulate the most efficient breeding strategy for improvement of time to flowering in chickpea in short-season temperate environments.


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