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Genetic analysis of seed size, yield and days to flowering in a chickpea recombinant inbred line population derived from a Kabuli × Desi cross
Author(s) -
Cobos M.J.,
Rubio J.,
FernándezRomero M.D.,
Garza R.,
Moreno M.T.,
Millán T.,
Gil J.
Publication year - 2007
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.2007.00152.x
Subject(s) - quantitative trait locus , biology , population , inbred strain , trait , agronomy , genetics , veterinary medicine , gene , medicine , demography , sociology , computer science , programming language
Quantitative traits, seed size, yield and days to flowering were studied in a chickpea intraspecific recombinant inbred line (RIL) population (F 6:7 ) derived from a Kabuli × Desi cross. The population was evaluated in two locations over 2 years. Days to flowering was also evaluated in the greenhouse under short‐day conditions. Seed size was the most heritable trait (0.90), followed by days to flowering (0.36) and yield (0.14). Negative and significant correlation was found between yield and seed size in the second year where environmental homogeneity was tested by analysing the controls included in each assay. During the first year, the environment was not considered homogeneous for yield in either location. Quantitative trait loci (QTLs) for the three characters were detected in linkage group (LG) 4. In relation to seed size, two QTLs were located in LG4 (QTL SW1 ) and LG8 (QTL SW2 ). QTL SW1 accounted 20.3% of the total phenotypic variation and QTL SW2 explained 10.1%. A QTL for yield (QTL YD ) was located in LG4 explaining around 13% of variation. QTL YD might be pleiotropic with QTL SW1 . For days to flowering, a QTL (QTL DF1 ) was located in LG4 for all environments analysed explaining around 20% of variation. QTL DF1 was closely linked to QTL SW1 and QTL YD in LG4.