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Subject: Plant Breeding and Genetics × Author: Arjun, K. × Start date: 1978 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    MAPPING OF FRUIT LENGTH RELATED QTLs IN INTERSPECIFIC CROSS OF Capsicum annuum L. × Capsicum galapagoense HUNZ.
    (Punjab Agricultural University, Ludhiana, 2016) Arjun, K.; Dhaliwal, M. S.
    Chilli (Capsicum annuum L.) is one of the major commercial spice and vegetable crop of India that has attracted breeder’s attention for the improvement of various economic traits. Fruit length that contributes directly to the total yield is quantitatively inherited and makes phenotypic selection tedious with low genetic gains. To facilitate marker assisted selection (MAS), quantitative trait loci (QTL) analysis was performed to identify fruit length related QTLs in an interspecific cross of Capsicum. The mapping population consisting of 210 F2plantswas derived from the cross between Capsicum annuum L. “FL 201” bearing long fruits and Capsicum galapagoense Hunz. ‘TC 07245” bearing very small fruits. The genetic map with 24 linked markers contained 3 linkage groups (LGs) covering a total distance of 399.0 cM with an average marker interval of 16.6 cM. On the basis of the interspecific map, two fruit length related QTLs designated as paufl2.1 and paufl2.2 were identified on LG 2.The QTL paufl2.1 was found to be the major QTL explaining 13.38 per cent of the phenotypic variation with likelihood score of 5.53. The minor QTLpaufl2.2explained 8.4 per cent of the phenotypic variation with likelihood score of 5.26. Both the QTLs showed positive additive genetic inheritance suggesting that these genomic regions play significant role in enhancing pepper fruit length. The identified QTLs might serve as potential target regions for identifying candidate genes through fine mapping.