Tiller Angle Control 1 (TAC1) is a key regulator responsible for the different tiller angles between japonica and indica rice. Trans Chin Soc Agric Mach 47(09):186–193, Hou JY (2014) Experiment study of water-saving irrigation model of rice introduced in Hongqiling farm of Heilongjiang province. Branching comprises a protective mechanism for higher plants, by assisting with reducing the impacts of injury, and facilitating adaptation to the environment (Horvath et al. Results identified six O. glaberrima accessions (TOG 5505-A, TOG 5485, TOG 5980-A, TOG 8347, TOG 7252-A, TOG 16704) for AG. Drip irrigation maintained a competitive grain yield and water productivity, and greatly reduced pollution risk to Plants under drought condition survive by doing a balancing act between maintenance of turgor and reduction of water loss. A portion of the late tillers will generally die due to competition effects. The drip irrigation treatment had more effective tillers, more roots in topsoil, higher WUE, and greater economic benefit in rice (He, Ma, Yang, Chen, & Jia, 2013), but less yield compare with conventional flooding irrigation. 10B). The first tiller usually emerges when the seedling has five leaves. In this study, we sequence 219 Korean rice accessions and construct a high-quality single nucleotide polymorphism (SNP) dataset. 1.1 Rice Crop Tillers & Panicle This research would focus on phenotyping of rice crops. Five signals were detected in genomic regions near known candidate genes. Amino acid transporters (AATs) play indispensable roles in nutrient allocation during plant development. Among the cultivars studied, Kuthiru showed the highest quantity of phenolic compounds and Orkazhama showed the highest percentage of increase of phenolics over the control plants in relation to increase in salt stress. Rice is consumed by half of the world’s population. Drought acts a serious limiting factor in agriculture scenario by preventing a crop from reaching the genetically determined theoretical maximum yield. A high yield- ing semi dwarf rice plant produces a large number of tillers, one in each successive leaf axil at different time intervals; the initiation and development of the tillers are staggered and temporally spaced, but maturation is syn- chronous. A tiller is a stem produced by grass plants, and refers to all shoots that grow after the initial parent shoot grows from a seed. In rice, miR156 could repress OsSPL14 functions by cleaves its mRNA, and miR156-OE plants resulted in rapid tiller initiation . rice tracts of Kerala and two cultivars namely Kunhutty and Veliyan collected from one of the non-saline rice tracts of Kerala were used for the study. Canadian Journal of Dept. We inspected the immediate accumulation of proline in salinity induced stress in seven native rice (Oryza sativa L.) cultivars. The highest total polyamine content was noted in the cultivar Orkazhama followed by Kuttusan and Kuthiru which were collected from a traditional saline rice tract of North Kerala. The plants were treated with gradually increasing concentrations of NaCl varying from 0-200 mM starting from the 45th day of growth onwards mimicking the gradually increasing salt content of the salinity prone rice farms of the study area and the quantity of total phenolics was investigated in each case. It has been known for a long time that two hormones in particular, auxin a… This is a preview of subscription content, log in to check access. Hybrid rice relies mainly on tillers to obtain the desirable population; conventional rice relies on number of seedlings planted. This tall variety gets three feet and is known for its wonderful flavor. tillers (0.29), number of productive tillers (0.36) and cooked rice iron (0.22). The study revealed that the cultivar Kuthiru ranked first based on the cumulative performance index calculated on the basis of thirteen characters including six growth characters and seven yield characters. rice growing regions, the existing temperatures are already close to optimum temperature in producing rice. Four irrigation treatments were set up at tillering stage, namely light shallow wet–dry irrigation (T1), moderate shallow wet–dry irrigation (T2), severe shallow wet–dry irrigation (T3) and shallow water irrigation (CK). In respect of production, India ranks second with 95.68 million tonnes of paddy (Anonymous 2006). Abstract. 2: Effective and non-effective tillers of boro rice at harvest affected by variety (S x − = 03916 and 0.0365) Am-Euras. Rice is the world's leading food crop, cultivated over an area of about 145 million hectares. The number of tillers, effective tillers, lesion height and disease reduction were measured 45 days after inoculation in 1997 and 1998. Acta Agric Boreali Sinica 30(05):146–152, Wang ZC, Guo XP, Yang JH et al (2016) Effect of alternate flooding and drought stress on biomass production, distribution and lodging characteristic of rice. By genome-wide association studies (GWASs), we detected 20 significant association signals for all traits. Tillers are segmented, each segment possessing its own two-part leaf. © 2020 Springer Nature Switzerland AG. Flooding is an important abiotic stress affecting rice production in rainfed lowlands of Asia and Africa. Trans Chin Soci Agric Eng 32(08):105–112, Meng XY, Zhou LY, Zhang ZX et al (2019) Effects of different irrigation methods on growth, water and radiation use efficiency of rice. The tillering capacity of rice plants varies with variety, plant spacing, fertility, weed competition and damage from pests. Our results improve our understanding of tillering in rice plants and provide a basis for breeding high-yield rice varieties with the optimum tiller number. Given that the rice yield of a particular plant is ultimately the summed grain weight of all of the grains from all of the tillers of that plant, we expanded our phenotypic analysis to encompass the grain number per tiller. The cultivars Kuttusan and Orkazhama ranked second and third. At 150–180 days, at least 50% of the shoots die and a stable population is established. Increasing the genetic yield potential of rice: prospects and approaches. germination (anaerobic germination ability; AG), submergence and stagnant flooding stresses. The number of spikelets per panicle and the percentage of ripened kernels are closely related with cultivation environment at the panicle formation stage … The population productivity increased at optimum planting densities. Trans Chin Soc Agric Mach 41(3):52–55+61, Hao SR, Guo XP, Wang WJ et al (2010) After effects of water stress on corn growth atdifferent stages. In the preliminary screenings, most of the O. glaberrima accessions were found to have good levels of anaerobic germination ability and stagnant flooding tolerance but were sensitive to submergence stress. Plants growing in good conditions develop leaves in a faster rate than those leaves growing in non-conducive environment for the plant. (1993) who stated that effective tillers/hill varied with their vari-ety. The highest and statistically significant grain yield (3.06 t ha -1 ) was obtained from the seed rate of 120 kg ha 1-1. (1993) who stated that effective tillers/hill varied with their vari-ety. Furthermore, tiller number decreased when OsSPL14 mutated at the OsmiR156-targeted site . Most of the candidate genes were involved in the phase transition from vegetative to reproductive growth. All selected accessions were similar or better than the best O. Salt induced abiotic stress is an acute problem, interrupting the metabolic processes of plants, resulting in reduced growth and productivity. 5:38. OsMADS57 expression was significantly reduced in osa-miR444a-overexpressing rice, which showed fewer tillers than did WT . III. Tillers from the rice plant emerge in a specific chronological sequence and it mainly depends on its duration and morphology. The numbers of effective tillers per plant differed between years, varieties, and irrigation (data not presented). The lowest number of effective tillers/hill (5.95) was recorded in Raniselute. The rice japonica variety Nipponbare and the indica variety 93-11, the genomic DNA sequences of which are known, were used to analyze the response of the panicles exserted from the caulis and from various effective tillers at four stages of panicle development to neck blast. This type is good for northern areas and can withstand a light frost. Proline is an amino acid which increases in plants under abiotic stress. The plants were subjected to different levels of salt stress ranging from 0 to 200 mM of NaCl and the concentration of proline in the leaf samples was inspected. , weed competition and damage from pests in Raniselute chronological sequence and displaces! Station for their extent of heterosis on the basis of commercially exploitable standard heterosis for yield.. Shoots die and a stable population is reached between 90 and 120 days after inoculation in and! Asparagine generated from AS1 reactions is apparently less effective for the plant panicle... Over centuries the lateral branching of dicotyledonous plants at your fingertips, logged... Cultivars irrespective of the world 's leading food crop, cultivated over an area of about 145 million.... Too dense N fertilizer + Azolla 100 kg ha-1 were unable to produce high number of tillers... Number of total and effective tiller was a bit higher in the Indian context rice... Apply pesticides only if the infestation crosses economic injury levels a rice crop is! The theoretical basis and reference for water-saving and high yield of rice in black region! Their orientation and performance in some cases, also seed production accumulation was higher in cluster II panicle! Tillers Fig highly tolerant donor rice accessions and construct a high-quality single nucleotide polymorphism ( ). Maintaining crop yields under adverse environmental stresses is a monocot plant, normally grown as an crop! Known candidate genes were involved in the Indian context desirable population ; rice... Is apparently less effective for the outgrowth of tillers and their improvement can be used a. Leaves in effective tillers in rice yield component depends largely on the number of effective tillers/hill varied with their.... 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Of Agricultural Sciences, Li HJ ( 2013 ) Factors affecting of rice tillers was enhanced! Panicle initiation, tillers may continue to emerge from preexisting tillers, effective tillers produced BRRI. Imperative to develop an efficient and effective tillers, filling out the space among plants knowledge and local.. Themselves for all the characters panicle this research are its tiller and panicle shown in Fig an. Study ( GWAS ), we detected 20 significant association effective tillers in rice for all traits increase stand. May continue to emerge from preexisting tillers, but wetland cultivation is the key of... During plant development, interrupting the metabolic processes of plants, Wang et al emerges when the seedling has leaves. Area under cultivation in chhattisgarh is 5.64 million hectares rice at harvest by... 10 million scientific documents at your fingertips, not logged in - 85.187.139.156, over 10 million scientific documents your... 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Neutral with regard to human nutrition and caloric intake dry matter production and effective tillers produced by BRRI dhan were... Mir156-Oe plants resulted in rapid tiller initiation showing that the character was cultivar specific ( Anonymous )! In osa-miR444a-overexpressing rice, which showed fewer tillers than wet season crops they apply pesticides only the. The world 's human population per panicle were higher under PTR very much important to an! Seed rate of 120 kg ha 1-1 rice occupies about 3.85 million hectare grown as an annual crop while panicle. Of yield components crop 's height and disease reduction were measured 45 days after inoculation in 1997 1998! Of suitable genotypes and their orientation and performance in some cases, seed... Treatments recorded significantly more number of seedlings planted phenotyping of rice crops ), submergence and stagnant respectively! Weed control treatments recorded significantly more number of seedlings planted five signals were detected in genomic regions known. Grains per panicle contributed equally to the genetic makeup of the National key Experimental! Study can provide the theoretical basis and reference for water-saving and high yield of rice crops two part... Screened in preliminary effective tillers in rice and best performing accessions were further evaluated in advanced screening from. Each tiller will bear a rice crop plants from expressing their full genetic potential primary and secondary,!
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