Performance of turmeric (Curcuma longa) genotypes for yield and root-knot nematode resistance

Abstract

Two hundred and fifty three turmeric (Curcuma longa L.) accessions were screened against root-knot nematode (Meloidogyne incognita) and identified seven nematode resistant accessions (Accs. 35, 48, 79, 130, 142, 146 and 200). These genotypes along with a susceptible accession (Acc. 376) and a released variety, IISR Prathibha were evaluated during 2008-2012 to assess the yield performance under Kerala conditions. The results indicated that in terms of yield, one resistant accession (Acc. 79) and moderately resistant accession (Acc. 48), performed significantly higher compared to the released variety IISR Prathibha. The pooled yield over three consecutive years varied from 10.56 kg/3m2 (Acc. 130) to 14.52 kg/3m2 (Acc. 48). Among the genotypes, Acc. 48 and Acc. 79 performed consistently with higher yield in all the three years. Maximum yield over three years pooled data was recorded in Acc. 48 (31.94 tonnes/ha) followed by Acc. 79 (31.79 tonnes/ha) over three years pooled data. The stability parameters of Acc. 48 and Acc. 79 showed good stability for yield and it indicates general adaptability of these two genotypes over years.