Molecular mapping of flowering time genes in chickpea (Cicer arietinum L.)

Mallikarjuna, B P and Samineni, S and Thudi, M and Sajja, S and Khan, A W and Patil, A and Viswanatha, K P and Varshney, R K and Gaur, P M (2017) Molecular mapping of flowering time genes in chickpea (Cicer arietinum L.). In: InterDrought-V, February 21-25, 2017, Hyderabad, India.

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Flowering time is an important trait of chickpea that influences crop adaptation to a given climate. Earliness in both flowering time and maturity are important traits for increasing and stabilizing chickpea productivity in short season environments by avoiding end of season drought. A study was conducted to identify genes/quantitative trait loci (QTLs) controlling flowering time in chickpea using four F2 populations (ICCV 96029 × CDC Frontier, ICC 5810 × CDC Frontier, BGD 132 × CDC Frontier and ICC 16641 × CDC Frontier). Genetic studies revealed monogenic control of flowering time in the crosses ICCV 96029 × CDC Frontier, BGD 132 × CDC Frontier and ICC 16641 × CDC Frontier, while in the cross ICC 5810 × CDC Frontier, it was under digenic control with complementary gene action. The genetic linkage maps developed from four crosses consisted of 75, 75, 68 and 67 markers spanning 248.8 cM, 331.4 cM, 311.1 cM, and 385.1 cM, respectively. A consensus map spanning 363.8 cM with 109 loci was developed by integrating four genetic maps. QTL mapping detected major genomic regions controlling early flowering genes efl-1 (Qefl1-2) on CaLG04, efl-2 (Qefl2-1, Qefl2-2, Qefl2-3, Qefl2- 4) on CaLG01, 03, 04 and 08, efl-3 (Qefl3-3) on CaLG08 and efl4 (Qefl4-1) on CaLG06. Analysis of QTL regions on CaLG04 and CaLG08 provided several important candidate genes involved in regulation of flowering time and homeotic functions. The identified genomic regions with linked molecular markers can be deployed for introgressing early flowering trait into elite chickpea cultivars through marker-assisted breeding (MAB).

Item Type: Conference or Workshop Item (Paper)
Divisions: Research Program : Asia
Research Program : Genetic Gains
Uncontrolled Keywords: Molecular mapping, flowering time, genetics, chickpea
Subjects: Mandate crops > Chickpea
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 13 Jun 2018 06:31
Last Modified: 24 Sep 2018 08:47
Acknowledgement: UNSPECIFIED
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