MARKER TRAIT ASSOCIATION IN BACKCROSS POPULATION OF INTERSPECIFIC CROSS (JATROPHA CURCAS X JATROPHA INTEGERRIMA)

G. SUBASHINI¹*, N. MANIVANNAN², M. PARAMATHMA^3
1Department of Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu
²Department of Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu
³Department of Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu
* Corresponding Author : subapbg2009@gmail.com

Received : 10-07-2015     Accepted : 12-11-2015     Published : 07-12-2015
Volume : 7     Issue : 12       Pages : 791 - 795
Int J Agr Sci 7.12 (2015):791-795

Keywords : Jatropha, SSR markers, ISSR markers, Marker assisted breeding
Academic Editor : Zhao Chen, K. Baghyalakshmi, Ramchander S.
Conflict of Interest : None declared
Acknowledgements/Funding : The authors profusely thank European Union project JATROPT for funding the project on” Applied and Technological Research in Plant Traits"
Author Contribution : None declared

In Jatropha marker-trait association were studied for twenty eight yield and yield component traits using 21 SSR markers and 22 ISSR markers with a set of 97 genotypes of BC4F1 population. Association of mean performance with corresponding marker score were assessed single marker analysis by using simple linear regression. Among this, 16 SSR and 18 ISSR primer pairs were identified as putatively linked to at least one of the investigated trait. The number of associated marker varies of associated marker varies from 6 (oil yield per plant) to one (number of female flower per inflorescence, number of seeds per fruit, fruit aspect ratio and oil content). The adjusted R2 for the regression equation varies from 3.1 to 11.6 %. Traits namely canopy cover between rows (ISSR 856), capsule weight per plant (ISSR 817) and seed yield per plant (ISSR 817) recorded above 10 % R2 value. This indicates that the same gene is controlling the expression of these characters. Moreover, phenotypically these characters have more association with each other. Hence these markers may be useful for marker assisted breeding programme.