Present investigation was conducted in 31 groundnut accessions to assess genetic divergence, characters association involving 13 quantitative characters and path coefficients in order to identify superior accessions exhibiting higher genetic diversity. Number of pods/plant, secondary branches, kernel width, and pod yield displayed a higher level of coefficient of variation both at phenotypic and genotypic level. Genetic advance with higher heritability indicated preponderance of additive variance for pod length, pod yield, and number of pods/plant. Number of secondary branches, kernel width, pod length, and number of pods/plant revealed significant positive correlation with pod yield. Path coefficient analysis revealed exertion of high positive direct effects on pod yield through pod length, kernel width and number of pods/plant. Cluster analysis exhibited substantial diversity among 31 accessions forming 13 clusters. Two clusters [X (two accessions) and XII (one accession)] showed the largest distance, which suggests hybridization between these accessions to achieve high level of heterosis for further exploitation. Five accessions viz., TAG-24, TG-69, ICGV-02005, TG-73 and TG-80 were identified as the most divergent for future use.
Experiments were conducted at Sartingal farm of Regional Horticulture Research Substation (RHRSS) Bhaderwah, Doda, SKUAST-Jammu in randomized block design with eight treatments replicated thrice to assess the losses caused by economically important diseases of pea viz., Ascochyta blight and powdery mildew of pea (Pisum sativum L.). Eight different fungicides and bioagents evaluated as foliar spray, recorded significant reduction against ascochyta blight and powdery mildew disease incidence with a concomitant significant increase in yield over control. Among the treatments, foliar spray with Hexaconazole @ 0.1% sprayed twice at 15 days interval was most effective in reducing the disease severity of Ascochyta blight (10.65%) and powdery mildew (8.83%). Percent reduction in disease incidence over control (42.08% Ascochyta blight and 37.66% powdery mildew) was 74.69% and 76.55% respectively in Ascochyta blight and powdery mildew. Accordingly pea yield was also highest in this treatment (99.78 q/ha) which recorded 134.83% increase in pea yield over check (42.49 q/ha). This was followed by Carbendazim @ 0.1% that recorded the disease severity of Ascochyta blight (12.74%) and powdery mildew (16.16%) and pea yield of 74.00 q/ha.
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