<div style="text-align: justify;">To study the genetics of seven agronomic and physiological characters (total dry matter (TDM), number of pods per plant, seed weight per plant, 100-seed weight, number of seeds per pod, pod length and root length density) which were correlated with yield, eight crosses of mungbean were made, and the agronomic and physiological characters were evaluated in the six basic generations (P1, P2, F1, F2, BC1 and BC2) of each cross. It was found that most characters including TDM, number of pods per plant, seed weight per plant and root length density showed additive, dominance and epistatic gene effects, except for 100-seed weight, number of seeds per pod and pod length. One hundred-seed weight and number of seeds per pod possessed only additive gene effects, while pod length was controlled by both additive and dominance gene effects. The duplicate epistasis revealed the presence of a large number of non-additive gene actions controlling TDM, number of pods per plant, seed weight per plant and root length density that may hinder the improvement of these characters, and confirmed that selection of these characters in later generations would be more feasible.&nbsp;</div>

Genetic studies in mungbean [<em>Vigna radiata</em> (L.) Wilczek]

<div style="text-align: justify;">Drought are serious threats on crop productivity losses than any other abiotic stress factor in rainfed agriculture. Influence of the drought using osmotic stress is the one of the best method for the evaluation of tolerance during the germination phase. Seeds of Twenty genotypes of groundnut imposed to osmotic stress (-10bars) of polyethylene glycol (PEG6000) in the laboratory condition. &nbsp;Based on low percent reduction recovery growth (%RRG) in shoot and root length most sensitive and tolerant 16 genotypes were selected. &nbsp;Further, moisture stress was imposed at 20-day-old seedlings at WW (100%FC), MS1 (70%FC), MS2 (30%FC)) under controlled conditions (greenhouse) different filed capacity. The harmful effects of &nbsp;moisture stress were more distinct in drought sensitive genotypes. High mean value of drought susceptibility indexes (DSI) for GPBD-4(G1), JL-24(G2) and KCG-6(G3) G1, G2 andG3 were identified as susceptible and NRCG12273 (G13), ICGV1562 (G15) and TMV-2(G16), G16, G15 and G13 recorded superior performance for less DSI under two soil moisture levels. High pod yield under stress environment due to its ability in maintaining pod number as well as total biomass. There was no significant difference between Pod yield and TDM under moisture stresses of DSI for G1, G2 and G3 genotypes.&nbsp;</div>

<div style="text-align:justify">Identification of drought tolerant genotypes based on physiological, biomass and yield response in groundnut (<em>Arachis hypogaea</em> L.)</div>

<p style="text-align: justify;">Groundnut is grown during July to October in kharif season, however area under early kharif (sowing in May) is increasing in Andhra Pradsh, where ever irrigation facilities exists. Hence to identify suitable variety for the situation, fourteen pre release and two released groundnut genotypes were evaluated during early kharif 2013 for growth, physiological traits and yield attributes. At harvest genotypes TCGS-1375 (41.331 g plant-1), TCGS-1342(41.059 g plant-1) significantly recorded higher total dry matter compared to all other cultivars and checks followed by TCGS-1330 (36.667 g plant-1), TCGS-1349 (36.433 g plant-1). &nbsp;TCGS-1342 recorded significantly higher Crop Growth Rate (CGR) value of 33.848 g m-2 day-1, where as TCGS-1346 (0.1265 g dm-2 day-1) and TCGS-1330 (0.1262 g dm-2 day-1) recorded significantly higher Net Assimilation Rate (NAR) values at 45-60 DAS. Cultivar, TCGS-1330 recorded significantly higher pod yield 4210.44 Kg ha-1 compared to other entries and checks. The results revealed that pre release genotypes, TCGS-1342, TCGS-1375, TCGS-1330, TCGS-1346 recorded high physiological efficiency in terms of growth and physiological traits viz. total dry matter (TDM), crop growth rate (CGR), net assimilation rate (NAR) and leaf area index (LAI) and also recorded high &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pod yield.</p>


Genetic studies in mungbean [Vigna radiata (L.) Wilczek]

Identification of drought tolerant genotypes based on physiological, biomass and yield response in groundnut (Arachis hypogaea L.)

Evaluation of groundnut genotypes for physiological efficiency and high yield to suit early kharif situation