In an attempt to develop effective biocontrol system for management of stem rot disease in groundnut, 57 bacterial isolates and 13 isolates of Trichoderma spp. Were evaluated for their antagonistic activity against Sclerotium rolfsii. The antagonists were selected based on their ability to inhibit the external growth of S. rolfsii from infected groundnut seeds. Four isolates of Pseudomonas fluorescens, GB 4, GB 8, GB 10 and GB 27, and T. viride pq 1 were identified as potent antagonists of S. rolfsii. T. viride pq 1 produced extra cellular chitinase and parasitized the mycelium of S.
Luu M Cuc; Mace, E.S.; Crouch, J.H.; Vu D Quang; Long, T.D.; Varshney, R.K.,( Rajeev K. Varshney )
Cultivated peanut or groundnut (Arachis hypogaea L.) is the fourth most important oilseed crop in the world, grown mainly in tropical, subtropical and warm temperate climates. Due to its origin through a single and recent polyploidization event, followed by successive selection during breedingefforts, cultivated groundnut has a limited genetic background. In such species, microsatellite or simple sequence repeat (SSR) markers are very informative and useful for breeding applications.
Vadez, V.; Nigam, S.N. ; Krishnamurthy, L. ; Aruna, R. ; Srivastava, N.
This article reports the results of two experiments carried out to standardize a protocol for the screening of salt-tolerant groundnut genotypes. The objectives were: (i) to identify an optimum NaCl treatment; (ii) to explore the potential tolerance mechanisms; and (iii) to assess the genotypic variation for salinity tolerance in groundnut. Results showed that 100-125 mM of NaCl was suitable to screen for salinity tolerance in groundnut.
Blümmel, M.; Nigam, S.N. ; Khan, A. ; Upadhyaya, H.D.,( Hari D. Upadhyaya ) ; Vellaikumar, S. ; Devulapalli, R.
Haulms from improved germplasm/released groundnut cultivars (ICGV 89104, ICGV 91114, TMV 2, ICGV 92093, ICGV 92020, ICGV 86325, ICGS 76, ICGS 11, ICGS 44, DRG 12 and ICGV 86590) were harvested at full pod maturity from seed multiplication trials at Patancheru, Andhra Pradesh, India. Four cultivars (DRG 12, ICGS 11, ICGS 44 and ICGV 86325) were harvested and fed in 2 different years. Haulms were fed ad libitum as sole feed to growing Deccani sheep which had a mean initial live weight of approximately 18 kg.
Upadhyaya, H.D.,( Hari D. Upadhyaya ); Nigam, S.N. ; Hildebrand, G.L. ; Yellaiah, N.
Nyanda (ICGV 93437) is a new Spanish groundnut breeding line developed at the International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India, during the 1990s. It was released in Zimbabwe in 2001 for commercial cultivation. It was derived from the cross between two early maturing advanced breeding lines ICGV 86063 and ICGV 86065. Nyanda produces 13.5% higher yield than the popular cultivar Falcon.
Blümmel, M.; Nigam, S.N. ; Upadhyaya, H.D.,( Hari D. Upadhyaya ) ; Ravi, D. ; Reddy, C.R.,( Ch. Ramakrishna Reddy )
Some 860 groundnut genotypes were grown during the post-rainy season of 2001/02, at Patancheru, Andhra Pradesh, India, using established ICRISAT protocols. Twelve cultivars (controls) were also planted in the post-rainy season of 2002/03 for the initial assessment of year effects. Haulms were analysed by a combination of conventional laboratory techniques and near infrared spectroscopy (NIRS).
Nigam, S.N.; Aruna, R. ; Yadagiri, D. ; Reddy, T.Y. ; Subramanyam, K. ; Reddy, B.R.R. ; Kareem, K.A.
Farmer participatory varietal selection trials in Anantapur, Andhra Pradesh, India identified ICGV 91114 as the most productive groundnut cultivar. This cultivar was adopted for large-scale production, giving higher pod and haulm yields and comparable shelling outturn compared with the control cultivar TMV 2.