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Idupulapati M. Rao

Idupulapati M. Rao
The Alliance of Bioversity International and CIAT · Crops for Nutrition and Health

Ph.D.
International consulting on agricultural research for development

About

363
Publications
115,074
Reads
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12,879
Citations
Introduction
Crop and forage adaptation to multiple abiotic stress factors Climate-smart crop-livestock systems Soil-plant relationships
Additional affiliations
November 2017 - present
The Alliance of Bioversity International and CIAT
Position
  • Professor Emeritus
Description
  • My role is to collaborate with the Center staff for their research for development efforts. My experience is in plant nutrition, plant physiology, crop and forage adaptation to environmental stress, and sustainable intensification of crop-livestock systems.
Education
January 1974 - January 1978
Sri Venkateswara University
Field of study
  • Botany (Plant Physiology)

Publications

Publications (363)
Article
Acid soils in the Amazon region are characterized by low fertility and high aluminum saturation causing reduced crop yields. Improving genetic adaptation of crop genotypes together with suitable agronomic management practices can mitigate the impact on crop production in acid soils. The objective of the present study was to determine the photosynth...
Article
Full-text available
The evaluation of disease resistance is considered an important aspect of phenotyping for crop improvement. Identification of advanced lines of the common bean with disease resistance contributes to improved grain yields. This study aimed to determine the response of the photosynthetic apparatus to natural pathogen infection by using chlorophyll (C...
Article
Full-text available
Intercropping is a common practice among smallholder farmers cultivating common bean (Phaseolus vulgaris L.) and maize (Zea mays L.). It affects agronomic performance, dry matter partitioning, and grain yield. Simultaneous intercropping of common bean with maize can influence growth, development, and dry matter partitioning of grain of common bean....
Chapter
Acid soil savannas of tropical America are a vast resource to expand agricultural production, alleviate the pressure on tropical rainforest and reduce greenhouse gas (GHG) emissions. During the past three decades there have been major changes in land use in the Cerrados of Brazil and to a lesser extent in the Llanos of Colombia. Monocropping and im...
Article
Full-text available
Common bean (Phaseolus vulgaris L.) production in the tropics typically occurs in rainfed systems on marginal lands where yields are low, primarily as a consequence of drought and low phosphorus (P) availability in soil. This study aimed to investigate the physiological and chemical responses of 12 bush bean genotypes for adaptation to individual a...
Article
Full-text available
Intercropping the common bean (Phaseolus vulgaris L.) with maize (Zea mays L.) is a widely used agronomic practice in smallholder farms in different regions of the world. Although it is a common practice in the Colombian Amazon region, crop yields are low due to the degradation of low fertility, acidic soil and high-temperature stress. Studies are...
Article
Full-text available
Common bean (Phaseolus vulgaris L.) is sensitive to different types of abiotic stresses (drought, high temperature, low soil fertility, and acid soil), and this may limit its adaptation and consequently to its yield under stress. Because of this, a sister species, tepary bean (Phaseolus acutifolius A. Gray), has recently gained attention in breedin...
Article
Full-text available
Livestock are critical for incomes, livelihoods, nutrition and ecosystems management throughout the global South. Livestock production and the consumption of livestock-based foods such as meat, cheese, and milk is, however, under global scrutiny for its contribution to global warming, deforestation, biodiversity loss, water use, pollution, and land...
Article
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Knowledge of the physiological basis for improved genetic adaptation of common bean (Phaseolus vulgaris L.) lines to acid soils and high temperature conditions in the Amazon region of Colombia is limited. In this study, we evaluated the differences among 41 common bean lines in energy use, leaf cooling, photosynthate partitioning to pod formation a...
Article
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In our study, we analyzed 30 years of climatological data revealing the bean production risks for Western Amazonia. Climatological profiling showed high daytime and nighttime temperatures combined with high relative humidity and low vapor pressure deficit. Our understanding of the target environment allows us to select trait combinations for reachi...
Article
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Background Phosphorus (P) is an essential macronutrient for plant growth that participates in a series of biological processes. Thus, P deficiency limits crop growth and yield. Although Stylosanthes guianensis (stylo) is an important tropical legume that displays adaptation to low phosphate (Pi) availability, its adaptive mechanisms remain largely...
Article
Full-text available
Tepary bean (Phaseolus acutifolius A. Gray) is more heat and drought tolerant than common bean (P. vulgaris L.). Four hundred mutant lines of two tepary accessions (G40068 and G40159) were generated by ethyl methane sulfonate (EMS) treatment. In preliminary studies of the M5 mutant lines under abiotic stress, three mutant lines (CMT 38, CMT 109, CM...
Article
Full-text available
Heat stress is a major limitation to grain yield in common bean (Phaseolus vulgaris L.). Tepary bean (Phaseolus acutifolius A. Gray) is better adapted to heat stress than common bean. Ten tepary bean accessions, four common bean genotypes and four interspecific lines involving P. vulgaris and P. acutufolius, P. coccineus and P. dumosus were evaluat...
Article
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Forage grass nutritional quality directly affects animal feed intake, productivity, and enteric methane (CH 4 ) emissions. This study evaluated the nutritional quality, in vitro enteric CH 4 emission potential, and optimization of diets based on two widely grown tropical forage grasses either alone or mixed with legumes. The grasses Urochloa hybrid...
Article
Full-text available
The common bean (Phaseolus vulgaris L.) is a food crop that provides fiber, vitamins and carbohydrates and it is produced by smallholders in developing countries under nitrogen (N)-depleted and low-fertility soil conditions. Soil acidity and the associated aluminum toxic and phosphorus deficient conditions are known to reduce symbiotic N-fixing abi...
Chapter
Common bean (Phaseolus vulgaris L.) is arguably the most important grain legume for human consumption, particularly for smallholder farmers across the tropical regions. Common bean provides a critical source of protein to diets, complementing staple sources of carbohydrate. This chapter highlights the agronomic context of production, domestication...
Article
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The degradation of tropical pastures sown with introduced grasses (e.g., Urochloa spp.) has dramatic environmental and economic consequences in Latin America. Nitrogen (N) limitation to plant growth contributes to pasture degradation. The introduction of legumes in association with grasses has been proposed as a strategy to improve N supply via sym...
Article
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Common bean has a high sensitivity to drought stress, particularly during reproductive development which reduces its yield. In this study we aimed to: (i) evaluate differences in shoot and root response of a mapping population of 107 recombinant inbred lines (RILs) of SEA 5 × AND 277 cross under drought stress, and (ii) identify the QTLs associated...
Article
Beef cattle production constitutes the main land use in the neotropical savannas of the eastern Colombian Orinoquia. However, the effects of Brachiaria decumbens Stapf (Bd) pastures and the alternative combination of savanna and B. decumbens pastures (SaBd) to raise and breed tropical beef heifers and cows, and their impacts on methane (CH4) emissi...
Chapter
Drought is the main abiotic stress limiting bean crop yield in smallholder systems in developing countries. Phaseolus is one of the main genera among the cultivated grain legumes, with a wide range of adaptations to different environments, from humid tropics to deserts. Among the Phaseolus species, five are known to have been domesticated and culti...
Article
Full-text available
Modern intensively managed pastures that receive large external nitrogen (N) inputs account for high N losses in form of nitrate (NO3–) leaching and emissions of the potent greenhouse gas nitrous oxide (N2O). The natural plant capacity to shape the soil N cycle through exudation of organic compounds can be exploited to favor N retention without aff...
Article
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The COVID-19 pandemic has become the leading societal concern. The pandemic has shown that the public health concern is not only a medical problem, but also affects society as a whole; so, it has also become the leading scientific concern. We discuss in this treatise the importance of bringing the world's scientists together to find effective solut...
Article
Full-text available
The common bean is the most important legume for human consumption and is grown in areas under conditions of varied rainfall and temperature that limit its yield. The objective of the present study was to identify genotypic differences in adaptation of 91 bean genotypes to high temperature under environmental conditions of a tropical dry forest eco...
Conference Paper
This paper is based on results obtained on live weight (LW) dynamics and it reviews the carbon (C) footprint of cattle-pasture systems where cattle were experimentally tested following representative commercial farming practices in the Colombian well-drained native Neotropical savannas. We found that the derived carbon dioxide-equivalent efficiency...
Article
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In Sub-Saharan Africa (SSA), many smallholder communities continuously grapple with soil-based poverty as the coarse-textured (sandy) soils, on which they eke out a living, have low water and nutrient retention capacities. The new sub-surface water retention technology (SWRT), which is based on the subsurface installation of impermeable water-retai...
Poster
Full-text available
The livestock sector in the LAC region is facing different problems of: (i) low productivity (ii) soil erosion, and (iii) low profitability due to inadequate insertion to markets. To address these issues, improved pastures with environmental traits along with adequate management practices might be one of the most promising options of the livestock...
Article
Crop yield requires leaf area to intercept solar radiation and to undertake photosynthesis, both of which depend on nitrogen (N) accumulation. Further, the amount of accumulated plant N at the beginning of seed fill serves as the reservoir for N required in synthesizing the proteins in developing seeds. For common bean (Phaseolus vulgaris L.), reso...
Article
Full-text available
Drought substantially limits seed yield of common bean (Phaseolus vulgaris L.) in the tropics. Understanding the interaction of drought on yield and the nutrient concentration of the seed is vital in order to supply nutrition to the millions of consumers who rely on common bean as a staple crop. Nevertheless, the impact of drought on common bean fo...
Article
The savannas of eastern Colombia located in the Orinoco river basin represent 18% of the Latin American neotropical savannas, and those areas that are tillable and closer to markets are subject to considerable anthropic pressure in the quest for intensification. Historically, and even today, beef cattle production constitutes the main land use, and...
Article
Full-text available
In a field experiment in Palmira, Colombia, we studied mycorrhizal root colonization, phosphomonoesterase activities and P and N foliar content before and after N fertilization among different Brachiaria genotypes with demonstrated biological nitrification inhibition (BNI) capacity. Furthermore, we tested the potential nitrification rate (PNR) in s...
Article
Full-text available
Background Common bean is the most important staple grain legume for direct human consumption and nutrition. It complements major sources of carbohydrates, including cereals, root crop, or plantain, as a source of dietary proteins. It is also a significant source of vitamins and minerals like iron and zinc. To fully play its nutritional role, howev...
Article
Full-text available
Common bean (Phaseolus vulgaris L.), one of the most important grain legume crops for direct human consumption, faces many challenges as a crop. Domesticated from wild relatives that inhabit a relatively narrow ecological niche, common bean faces a wide range of biotic and abiotic constraints within its diverse agroecological settings. Biotic stres...
Article
Full-text available
The tropical forage grass Brachiaria humidicola (Bh) controls soil microbial nitrification via biological nitrification inhibition (BNI). The aim of our study was to verify if nitrate reductase activity (NRA) in Bh roots or leaves reflects in vivo performance of BNI in soils. NRA was measured in roots and leaves of contrasting accessions and apomic...
Article
Full-text available
A decline in pasture productivity is often associated with a reduction in vegetative cover. We hypothesize that nitrogen (N) in urine deposited by grazing cattle on degraded pastures, with low vegetative cover, is highly susceptible to losses. Here, we quantified the magnitude of urine-based nitrous oxide (N2O) lost from soil under paired degraded...
Article
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The progress in identification of genotypes with roots showing greater ability to penetrate compacted soils under moisture stress and understanding the physiological basis and morphological expression of the characteristics associated is fundamental to improving crop’s tolerance to drought and to increase productivity under individual and combined...
Article
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Background The apomictic reproductive mode of Brachiaria (syn. Urochloa) forage species allows breeders to faithfully propagate heterozygous genotypes through seed over multiple generations. In Brachiaria, reproductive mode segregates as single dominant locus, the apospory-specific genomic region (ASGR). The AGSR has been mapped to an area of reduc...
Chapter
Belowground (BG) plant resource allocation, including roots and rhizodeposition, is a major source of soil organic matter. Knowledge on the amounts and turnover of BG carbon (C), nitrogen (N), and phosphorus (P) in soil is critical to the understanding of how these elements cycle in soil-plant system. However, the assumptions underlying the quantif...
Article
Full-text available
In most of sub-Saharan African countries, including Rwanda, the predominant agricultural production is from a mixed-crop-livestock farming system, because of small size land holding. The objective of this study was to assess the seasonal availability of livestock feed resources in the semi-arid and humid environments of Rwanda. Structured questionn...
Article
Full-text available
For seed crops, yield is the cumulative result of both source and sink strength for photoassimilates and nutrients over the course of seed development. Source strength for photoassimilates is dictated by both net photosynthetic rate and the rate of photoassimilate remobilisation from source tissues. This review focuses on the current understanding...
Article
Full-text available
The common bean (Phaseolus vulgaris L.) is a major food legume cultivated by smallholder farmers in the tropics of Latin America and eastern and southern Africa. Acid soil and high temperature limit its production. Here we quantify differences in agronomical, phenological and physiological performance of common bean lines in order to identify promi...
Article
The tropical forage grass Brachiaria humidicola (Bh) suppresses the activity of soil nitrifiers through biological nitrification inhibition (BNI). As a result, nitrate (NO−3) formation and leaching are reduced which is also expected to tighten the soil nitrogen (N) cycle. However, the beneficial relationship between reduced NO−3 losses and enhanced...
Data
Supplementary Material: Low 15 N Natural Abundance in Shoot Tissue of Brachiaria humidicola Is an Indicator of Reduced N Losses Due to Biological Nitrification Inhibition (BNI)
Article
Full-text available
Common bean productivity is reduced by several abiotic stress factors like drought and low soil fertility, leading to yield losses particularly in low input smallholder farming systems in the tropics. To understand the genetics of stress tolerance, and to improve adaptation of common bean to adverse environments, the BAT 881 x G21212 population of...
Data
Pearson correlations between phenotypic trait data sets. Only significant correlations are shown, with significance levels of * = p < 0.05, ** = p < 0.01, *** = p < 0.001. Significant positive correlations depicted in blue, negative correlations in red. Correlations within the same trial data set are boxed in red. (XLSX)
Data
Soil conditions for 15 trials across the four locations Darién, Popayán, Palmira and Quilichao where the population BAT 881 x G21212 was evaluated. (DOCX)
Data
Frequency distributions of phenotypic traits evaluated in 15 trials over four locations for the BAT 881 × G21212 population. Blue circle and pink triangle indicate phenotypic values for BAT 881 × G21212, respectively. LSD shown under each violin plot. (TIF)
Data
Summary of molecular markers and mean distances between markers on individual chromosomes in the genetic linkage map of the BAT 881 x G21212 population. (DOCX)
Data
Maximum and minimum temperatures, rainfall distribution and pan evaporation during crop growing period at 2002–2003 Quilichao; 2000 and 2002 Palmira and 1999 and 2005 Popayán in Colombia. (TIF)
Data
All QTLs identified in the BAT 881 x G21212 population evaluated at four locations in Colombia. Pos. cM: Genetic position in centimorgan; Physical pos: physical position in Mbp, according to reference genome version 2.1; PVE (%): Phenotypic variation explained by the QTL; Add: Estimated additive effect of the marker; Sources: parent BAT 881 B or G2...
Article
Full-text available
Aims Symbiotic nitrogen fixation (SNF) contributes to improve grain yield under nitrogen (N) deficiency. Climbing beans are known to be superior to bush beans in their potential for SNF. The main objectives of this study were to: (i) quantify genotypic differences in SNF ability of climbing