CAPTURING GENETIC DIVERSITY IN GENOMIC SELECTION PANEL OF GROUNDNUT FOR FOLIAR DISEASE RESISTANCE, YIELD AND NUTRITIONAL QUALITY TRAITS

SUNIL CHAUDHARI¹*, D. KHARE², S. SUNDRAVADANA³, SURENDRA S. MANOHAR⁴, MURALI T. VARIATH^5
1International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
²Jawaharlal Nehru Krishi Vishwa Vidyalaya (JNKVV), Jabalpur, 482004, India
³Coconut Research Station, Tamil Nadu Agricultural University (TNAU), Aliyarnagar, Tamil Nadu, 642101, India
⁴International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
⁵International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, 502324, India
* Corresponding Author : schoudhary612@gmail.com

Received : 04-05-2017     Accepted : 24-05-2017     Published : 28-05-2017
Volume : 9     Issue : 5       Pages : 278 - 283
Genetics 9.5 (2017):278-283

Keywords : Genetic diversity, Foliar disease resistance, Multivariate analysis, Clustering, Peanut
Academic Editor : Dr Nimit Kumar
Conflict of Interest : None declared
Acknowledgements/Funding : The authors are thankful to Bill and Melinda Gates Foundation for providing the scholarship to the first author (through TL-II project) and to Coconut Research Station, TNAU, Aliyarnagar for providing field, resources and technical support to conduct this study
Author Contribution : The study was conducted by Sunil Chaudhari

Diversity among the genotypes for important target traits is essential to achieve crop improvement goals. A set of 340 groundnut genotypes included in Genomic Selection Panel (GSP) was evaluated at disease hotspot location to capture genetic diversity for resistance to foliar fungal diseases, yield and nutritional quality traits. The results revealed significant genotypic variation for all the traits under study. Cluster analysis based on phenotypic data of 19 traits grouped 340 genotypes into 15 clusters. The inter-cluster distance was high between clusters XIV and XV (894.73) while the intra-cluster distance was high for cluster XIII (120.21). Maximum contribution towards total divergence was by hundred kernel mass (24.42%), followed by days to maturity (15.95%), disease severity scores of rust (9.18%) at 90 DAS, plant height (8.87%) and disease severity scores of late leaf spot (7.37%) at 90 DAS. The performance of different botanical varieties revealed that var vulgaris (Spanish bunch) had high yield potential; var peruviana had an early maturity and var hypogaea (Virginia runner) had high Oleic/Linoleic acid ratio. A total of 50 genotypes identified resistant against both the diseases, of which 36 including 25 from ssp. fastigiata var vulgaris and 11 from ssp. hypogaea var hypogaea were advance breeding line that can be used in breeding program without tedious efforts of pre-breeding. Pod yield of resistant advance breeding lines varied from 1230 to 3560 kg/ha. The genotypes ICGVs 01274, 01361, 03043,05155, 05163, 06142, 07120 and 07235 recorded pod yield ≥ 2500 kg/ha with the disease severity score ≤ 3 for both the diseases. The genotypes ICGV 05155 (101 days) and ICGV 86699 (103 days) reported early maturing with disease severity score ≤ 3 for both the diseases are suggested to use in breeding program to combine diseases resistance with early maturity along with high pod yield potential.

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