Background: Among all the pulses, chickpea is the most important rabi crop with high acceptabilit... more Background: Among all the pulses, chickpea is the most important rabi crop with high acceptability and wider use in India. More availability of quality seed of improved varieties being made available to the famers is one of the most important factors contributing to better harvest of chickpea in recent years. Therefore, there is urgent need for developing high yielding varieties of chickpea employing sound and effective breeding strategies. The study of variability, correlation and path coefficient analysis for seed yield with other yield contributing characters is of immense importance to get information regarding exercising selections for genetic improvement in chickpea.Methods: A total of 40 genotypes of chickpea were undertaken for present study and these genotypes evaluated in randomized block design (RBD) with three replications at Rajasthan Agricultural Research Institute (SKNAU), Jaipur Rajasthan, India under late sown conditions during rabi 2019-20. The experimental unit wa...
Although chickpea (Cicer arietinum L.) has high yield potential, its seed yield is often low and ... more Although chickpea (Cicer arietinum L.) has high yield potential, its seed yield is often low and unstable due to the impact of abiotic stresses, such as drought and heat. As a result of global warming, both drought and heat are estimated to be major yield constraints between one-quarter and one-third per annum. In the present review, genomic-mediated breeding strategies to increase resilience against global warming. Exacerbated drought and heat stresses have been examined to understand the latest advancement happening for better management of these challenges. Resistance mechanisms for drought and heat stresses consist of (i) escape via earliness, (ii) avoidance via morphological traits such as better root traits, compound leaves, or multipinnate leaves and double-/multiple-podded traits, and (iii) tolerance via molecular and physiological traits, such as special tissue and cellular abilities. Both stresses in chickpeas are quantitatively governed by minor genes and are profoundly i...
... Variances in the M2 and M3 generations for these different quantitative characters, based on ... more ... Variances in the M2 and M3 generations for these different quantitative characters, based on both the experimental and the control data, were statistically analyzed as suggested by Panse and Sukhatme (1978) and Singh and Chaudhary (1985). ...
Studies on effect of different mutagens were carried out with three concentrations of EMS (0.2, 0... more Studies on effect of different mutagens were carried out with three concentrations of EMS (0.2, 0.4 and 0.6%) and DMS (0.02, 0.04 and 0.06%) along with growth regulators viz., indol acetic acid and gibberellic acid (3x10−3 M) on blackgram cultivar Dungla. A dose dependent reduction in germination, seedling height and seedling dry weight was observed with increasing concentrations of mutagens. The mutagenic effect was neutralized by the GA and IAA treatment and increased the germination, seedling height and seedling dry weight, respectively. Induced pollen sterility was also significant and dose dependent at all the concentrations of mutagens and improvement in the pollen fertility was observed with post treatment of IAA and GA. A wide spectrum of chlorophyll and macro mutations was observed in the progenies of M2 generation. The frequency and spectrum of chlorophyll and macro mutants increased with increasing concentrations of the mutagens. DMS induced a broader spectrum of chlorophyll and macro mutations in M2 generation as compared to EMS. In the present investigation, DMS was more effective and EMS was efficient mutagen. Though effectiveness and efficiency computed by different methods varied in quantum, their relative proportion were comparable. A single method of studying mutagenic effectiveness and efficiency should be appropriate.
Background: Among all the pulses, chickpea is the most important rabi crop with high acceptabilit... more Background: Among all the pulses, chickpea is the most important rabi crop with high acceptability and wider use in India. More availability of quality seed of improved varieties being made available to the famers is one of the most important factors contributing to better harvest of chickpea in recent years. Therefore, there is urgent need for developing high yielding varieties of chickpea employing sound and effective breeding strategies. The study of variability, correlation and path coefficient analysis for seed yield with other yield contributing characters is of immense importance to get information regarding exercising selections for genetic improvement in chickpea.Methods: A total of 40 genotypes of chickpea were undertaken for present study and these genotypes evaluated in randomized block design (RBD) with three replications at Rajasthan Agricultural Research Institute (SKNAU), Jaipur Rajasthan, India under late sown conditions during rabi 2019-20. The experimental unit wa...
Although chickpea (Cicer arietinum L.) has high yield potential, its seed yield is often low and ... more Although chickpea (Cicer arietinum L.) has high yield potential, its seed yield is often low and unstable due to the impact of abiotic stresses, such as drought and heat. As a result of global warming, both drought and heat are estimated to be major yield constraints between one-quarter and one-third per annum. In the present review, genomic-mediated breeding strategies to increase resilience against global warming. Exacerbated drought and heat stresses have been examined to understand the latest advancement happening for better management of these challenges. Resistance mechanisms for drought and heat stresses consist of (i) escape via earliness, (ii) avoidance via morphological traits such as better root traits, compound leaves, or multipinnate leaves and double-/multiple-podded traits, and (iii) tolerance via molecular and physiological traits, such as special tissue and cellular abilities. Both stresses in chickpeas are quantitatively governed by minor genes and are profoundly i...
... Variances in the M2 and M3 generations for these different quantitative characters, based on ... more ... Variances in the M2 and M3 generations for these different quantitative characters, based on both the experimental and the control data, were statistically analyzed as suggested by Panse and Sukhatme (1978) and Singh and Chaudhary (1985). ...
Studies on effect of different mutagens were carried out with three concentrations of EMS (0.2, 0... more Studies on effect of different mutagens were carried out with three concentrations of EMS (0.2, 0.4 and 0.6%) and DMS (0.02, 0.04 and 0.06%) along with growth regulators viz., indol acetic acid and gibberellic acid (3x10−3 M) on blackgram cultivar Dungla. A dose dependent reduction in germination, seedling height and seedling dry weight was observed with increasing concentrations of mutagens. The mutagenic effect was neutralized by the GA and IAA treatment and increased the germination, seedling height and seedling dry weight, respectively. Induced pollen sterility was also significant and dose dependent at all the concentrations of mutagens and improvement in the pollen fertility was observed with post treatment of IAA and GA. A wide spectrum of chlorophyll and macro mutations was observed in the progenies of M2 generation. The frequency and spectrum of chlorophyll and macro mutants increased with increasing concentrations of the mutagens. DMS induced a broader spectrum of chlorophyll and macro mutations in M2 generation as compared to EMS. In the present investigation, DMS was more effective and EMS was efficient mutagen. Though effectiveness and efficiency computed by different methods varied in quantum, their relative proportion were comparable. A single method of studying mutagenic effectiveness and efficiency should be appropriate.
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Papers by Shailesh Kumar Jain