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Not AvailableIn 'calcareous and alkaline soil-lime induced iron, deficiency chlorosis is of common occurrence in crop plants (Chen and Barak 1982). In groundnut, such chlorosis is very common in the Saurashtra region ofGujarat, Marathwada of Maharashtra and parts of Tamil Nadu and Karnataka (Kannan 1984). Soil and foliar application of iron containing fertilizers help the plants recover from such chlorosis but this effect does not persist for long and hence are required to be done frequently (Singh and Dayal 1992 ). The selection of Feefficient genotypes (tolerant) which can tolerate Fedeficiency chlorosis is the alternative solution to this problem as iron is found in abundance in soil and groundnut genotypes differ in their response to Fe stress (Singh and Chaudhari 1991 and 1993).Not Availabl

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Not AvailableFresh seed dormancy in Spanish bunch groundnut has a significant influence on pod yield and quality. It is required to avoid economic loss in the form of in-situ germination during unpredictable rainfall at maturity. A study was carried out using 35 Spanish bunch groundnut genotypes to identify fresh seed dormant genotypes. Analysis of variance revealed that significant genotypic differences and genotype × year interaction for germination per cent. Association studies showed that significant correlation coefficients between duration of fresh seed dormancy and intensity of fresh seed dormancy. The result revealed that three advanced breeding lines viz., PBS-12171, PBS-12169 and PBS-18035 had more than four weeks duration of fresh seed dormancy, highest intensity and degree of fresh seed dormancy during 2012 and 2013 season. Therefore, these genotypes were identified as new sources of fresh seed dormancy and could be used as donor parent in breeding programme to develop high yielding Spanish bunch cultivars with 2-3 week fresh seed dormancy in groundnut.Not Availabl

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Not AvailableA study was carried out using 18 Spanish bunch groundnut genotypes to identify fresh seed dormant genotypes. Analysis of variance revealed that significant genotypic differences and genotype × year interaction for germination per cent at different weekly intervals. Two year study results showed that six advanced breeding lines viz., PBS 12171, PBS 12187, PBS 12189, PBS 12190, PBS 12191 and PBS 12192 identified for >35days duration of fresh seed dormancy, highest intensity and degree of fresh seed dormancy. Two advanced breeding lines PBS12193 and PBS 12196 identified for 28 days duration of fresh seed dormancy along with highest intensity and degree of fresh seed dormancy. However, an advanced breeding line PBS 12195 identified for 21 days duration of fresh seed dormancy along with average highest intensity and degree of fresh seed dormancy while one genotype ICGV 86031 also had 21 days duration of fresh seed dormancy along with average high intensity (94.4%) and degree of fresh seed dormancy (7.5). One advanced breeding lines PBS 12197 identified for 14 days duration of fresh seed dormancy along with high intensity (97.8%) and degree of fresh seed dormancy (7.5) during 2014 and 2015. Therefore, these genotypes were identified as new sources of fresh seed dormancy with different duration, high intensity and high degree of fresh seed dormancy. These genotypes could be used as donor parent in breeding programmes to develop high yielding Spanish bunch varieties with 2-5 week fresh seed dormancy in groundnut.Not Availabl