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Legumes are a chief source of sustainable, inexpensive protein, also abundant in complex carbohydrates, dietary fibre and essential vitamins and minerals. India is the largest global producer (25%) of legumes. Among these legumes, chickpea (Cicer arietinum L.) accounts for 40% of India's pulse production and is considered a better-quality protein source than other pulses. India is also the largest consumer (76%) of the total chickpea produced globally. Besides their nutritional benefits, chickpea is also being used for its nutraceutical and prebiotic potential. Recent studies have also suggested their role in alleviating chronic diseases like diabetes, blood pressure, obesity and even cancer. Chickpea contains several bioactive compounds that are now being researched for their health benefits in human beings. Like other pulses, chickpea also has some antinutritional factors that can be annihilated by different processing and cooking methods. This literature review seeks to evaluate the research done on the nutritional, antinutritional, nutraceutical, prebiotic and health benefits of chickpea.
Pearl millet (Pennisetum glaucum (L.) R.Br.) is the major staple crop produced by subsistence farmers in the West African Sahel, but its panicle yield is low because of poor seedling establishment in low-nutrient soils. Seedball is a cheap seed-pelleting technique that combines sand, loam, seeds and optionally wood ash or mineral fertiliser as an additive to enhance early growth of pearl millet under infertile soil conditions. The aim of this study was to investigate the effects of seedball technology on pearl millet crop establishment and panicle yield on-farm under Sahelian subsistence conditions. Over 2000 on-farm (2015–18) trials were conducted in 65 villages of the Maradi region in Niger. Conventionally sown and seedball-derived pearl millet crops were grown by using ‘farmer-optimised' simple split-plot designs with three treatments: (i) farmers' practice as control; and seedballs (2.0 cm diameter, made from 80 g sand + 50 g loam + 25 mL water + 2.5 g seeds as standard recipe) that contained either (ii) 3 g wood ash or (iii) 1 g mineral fertiliser (nitrogen, phosphorus, potassium; NPK) as effective nutrient compounds. In 2016–18, participating farmers could opt for one of the seedball treatments. Panicle as well as stover yield data were collected and compared with respect to seedball type (wood ash vs NPK), sowing depth (shallow vs deep), sowing time (wet vs dry), weed management (complete vs partial), local soil type (texture range sand to loamy sand), cropping system (sole vs mixed), and farmer. Results showed that seedballs do not suppress seedling emergence. Seedball treatments produced fewer but longer and denser panicles. Wood ash-amended seedballs showed a higher panicle yield increase relative to their site controls than NPK-amended seedballs. However, the average panicle yield of NPK-amended seedballs was higher than that of the wood ash-amended seedballs. The treatment factors wet sowing, partial weeding, sole cropping and farmers showed higher panicle yield. The seedball technology increases pearl millet panicle yield by ∼30% in the Sahel; it is simple and based on local materials.
Context The kikuyu grass (Cenchrus clandestinus) is native to Africa and is one of the most widely used grasses for forage feeding in dairy regions around the world.
Aims To obtain the first set of microsatellite markers for the population genetics study of kikuyu grass, using nextgeneration sequencing technology (Illumina MiSeq).
Methods Sixty loci were evaluated, in which a subset of 12 loci were selected to be used for a complete population analysis in 108 samples of kikuyu, and were grouped in to three zones of Colombia. The three approaches with which the genetic structure was evaluated.
Key results Obtained same tendency of grouping reflects a low genetic differentiation, specifically evidencing differences between the northern zone of Antioquia and the zones that comprise the other territories of Colombia.
Conclusions These reads of microsatellite loci help to complement the information on the genetic structure of the populations of the kikuyu, and will be useful for the characterisation and evaluation of the diversity of germplasm in other parts of the world.
Implications The set of microsatellite markers developed has a species-specific reproducibility and could be used for studies in other Cenchrus individuals and particularly in future investigations with Kikuyu grass. Likewise, this research presents findings in a broad context and relates them to other pasture species.
Enhancement of rice (Oryza sativa L.) productivity under rainfed ecosystems is important to food security. Efforts to increase yield have had little success, mainly due to the complexity of inheritance of abiotic stress tolerance traits and the technical challenges of phenotyping these traits. The study was conducted to pyramid quantitative trait loci (QTLs) governing tolerance to moisture and heat stress from cv. Nagina22 and QTLs for high yield traits from variety IR64, with the aid of marker-assisted pedigree breeding. From the IR64/N22 cross, we identified 14 pyramided lines with various combinations of targeted QTLs (5–11 QTLs). The three best lines that performed well under moisture stress conditions were PL76 with two water-use efficiency (WUE) QTLs (Mr19a, SLA 9.1), three drought-tolerant yield (DTY) QTLs (qDTY1.2, qDTY3.2, qDTY6.1), one heat-tolerance (HT) QTL (qSSPF10) and four yield QTLs (qFLW4.1, qFLL9, LP1, GW5); PL476 with two WUE QTLs (%N11.1, qWue7a), two DTY QTLs (qDTY6.1, qDTY12.1), two HT QTLs (qSSPF10, qHT6) and three yield QTLs (qFLW4.1, qFLL9, LP1); and PL130 with two WUE QTLs (Mr19a, qWue7a), four DTY QTLs (qDTY1.2, qDTY3.2, qDTY4.1, qDTY12.1), two HT QTLs (qSSPF10, qHT6) and two yield QTLs (qFLW4.1, LP1). These three lines shown a yield advantage of 51.93%, 55.93% and 60.30%, respectively, over high-yielding IR64. Under heat stress, PL457 and PL130 with HT QTLs qSSPF10 and qHT6 showed 85.02% and 61.55% yield advantage, respectively, over IR64. In conclusion, we have demonstrated that the systematic combination of important QTLs from two contrasting parents through marker-assisted pedigree breeding is an outstanding approach to supplement conventional phenotype-based pedigree breeding, especially to improve complex traits such as yield and tolerance to moisture stress and heat.
Improving drought endurance in wheat needs high-throughput screening of yield components including seed volume, area, and weight, all of which are very effortful, time-consuming, and visually mostly infeasible. Imaging-based screening presents an opportunity for more exact/rapid analysis of seed morphometric traits. Therefore, this study was aimed at evaluating the phenotypic diversity of wheat seeds under rain-fed and well-watered conditions by using image analysis. From our observations, the criteria Feret (largest axis length) and MaxR (radius of the enclosing circle centered at the middle of mass) exhibited that grain length is less affected by drought. In the rain-fed environment, seed weight had the highest correlation with seed volume (r = 0.76**) and area (r = 0.76**). The correlation of 1000-grain weight with aspect ratio (r = –0.22**) and Rroundness (r = –0.21**) was negative and also non-significant (P > 0.05). The PCA and cluster analysis highlights the MinR (radius of the inscribed circle centered at the middle of mass), Area, Circ (Circularity), ArEquivD (area equivalent diameter), thickness, and seed volume characteristics can be used as useful parameters to identify genotypes suitable for planting in a rain-fed environment. The relative importance of traits for 1000-grain weight in the neural network displayed that the greatest impact in the rain-fed environment was related to seed volume, area, and MBCRadius (radius of the minimal bounding circle). Overall, our findings permitted the formation of a morphometric seed database for the conservation and characterisation of wheat germplasm.
Lodging and water deficit (WD) are both yield limiting factors for rice production in Africa. A number of New Rice for Africa (NERICA) cultivars with drought adaptive and high yielding ability have been released but the extent of their lodging susceptibility due to water deficit is unclear. Application of orthosilicic acid (OSA) fertiliser can reduce lodging due to water deficit. An experiment was therefore conducted involving six cultivars (NERICAs 1, 4, 6, 7, 8 and Moroberekan), subjected to five multi-growth stage WD treatments: non-stressed (Nst), 10-day stress at each of any two stages of vegetative (Veg), reproductive (Rep) and grain filling (Grain) stages viz (Veg10 + Rep10), (Veg10 + Grain10), (Rep10 + Grain10), and 7-day stress at each stage (Veg7 + Rep7 + Grain7) and with/without 500 mL ha-1 of OSA fertiliser. Lodging traits (LTs) such as lumen diameter, bending moment, panicle weight (PW) and grain yield (GY) were increased by OSA fertiliser. Under Veg7 + Rep7 + Grain7 stress, OSA fertiliser increased rice vigour through increases in internode length, lumen diameters and cross-section modulus by 7%, 18% and 18%, respectively, while under Veg10 + Rep10 stress, culm wall thickness was increased by 20%. Veg10 + Rep10 stress caused the most significant reduction in all LTs but with lowest lodging index (LI, 0.32) attributed to reduced PW and GY. Among the cultivars, Moroberekan combined higher GY with average LI (0.40) across the stress conditions while NERICA 1 had the lowest LI (0.34) attributed mainly to its short height. Although water deficit caused a reduction in lodging resistant traits, resistance to lodging under Veg10 + Rep10 and Veg7 + Rep7 + Grain7 stresses can be enhanced with OSA fertiliser.
The wheat Green Revolution Rht-B1b and Rht-D1b dwarfing alleles are associated with increased grain yields but also with reduced early growth and seedling emergence, especially if sowing conditions are unfavourable. The gibberellic acid-responsive, mutagen-derived Rht18 dwarfing gene was backcrossed from durum wheat (Triticum turgidum subsp. durum L.) cv. Icaro into tall bread wheat (Triticum aestivum L.) cv. Halberd using phenotypic selection for reduced plant height. The Rht18 allele was confirmed among homozygous BC1F2-derived, F5:7 recombinant inbred lines by using a chromosome 6AS-linked, microsatellite molecular marker (Xwms4608), and then assessed for agronomic performance across multiple field sites ranging in yield from 3.6 to 6.4 t/ha. The Rht18-containing lines were significantly (P < 0.05) shorter in height (-24%) and reduced in plant lodging (-51%) compared with tall sister lines. Reductions in plant height were associated with significant increases in grain yield (+16%), reflecting increases in grain number (+21%), number of spikes (+7%) and number of grains per spike (+12%). Coleoptile length, early shoot biomass and ground cover percentage were unaffected by the presence of the Rht18 dwarfing gene. Comparisons of effects of gibberellic acid-insensitive Rht-B1b and Rht18 on early growth and agronomic performance were assessed separately for a set of 30 BC5F6-derived Halberd near-isogenic lines in the field in 2015. Ground cover and coleoptile length were significantly greater for Rht18 lines, whereas plant height, lodging, harvest index, grain number and yield were similar for Rht-B1b and Rht18 sister lines. Reduced lodging and increased grain number and yield, together with greater coleoptile length, indicate a potentially useful role for Rht18 in improving wheat performance.
The introduction of harvest weed seed control (HWSC) techniques and associated machinery has enabled the routine use of an alternative weed control technology at a novel weed control timing in global grain cropping fields. Driven by the significant threat of widespread populations of annual ryegrass (Lolium rigidum) with multiple-herbicide resistance, in the 1990s Australian growers and researchers developed techniques to target, at grain harvest, the seed production of annual ryegrass and other important weed species. The HWSC approach to weed management is now routinely used by a majority of Australian grain producers as an integral component of effective weed control programs. Here we detail the development and introduction of current HWSC systems and describe their efficacy in Australian grain production systems. The use of HWSC has likely contributed to lower annual ryegrass population densities and thus mitigated the impacts of herbicide resistance as well as slowing further evolution of resistance. In addition, low weed densities enable the introduction of site-specific weed control technologies and the opportunity to target specific in-crop weeds with non-selective alternative weed control techniques. With an awareness of the evolutionary potential of weed species to adapt to all forms of weed control, there is an understanding that HWSC treatments need to be judiciously used in grain cropping systems to ensure their ongoing efficacy. The successful use of Australian developed HWSC systems has attracted global interest and there is now a considerable international research effort aimed at introducing this alternative weed control approach and timing into the world's major cropping systems.
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