scholarly journals Yield Response of Direct Seeded <i>Aus</i> Rice Varieties under Rainfed Condition

2018 ◽  
Vol 09 (03) ◽  
pp. 416-434
Author(s):  
Uttam Kumar Ghosh ◽  
Md. Arifur Rahman Khan ◽  
M Abdul Karim ◽  
Md Anamul Haque
Keyword(s):  
Yield Response ◽  
Rice Varieties ◽  
Rainfed Condition ◽  
Direct Seeded

scholarly journals Genetic Mapping by Sequencing More Precisely Detects Loci Responsible for Anaerobic Germination Tolerance in Rice

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 705
Author(s):  
John Carlos I. Ignacio ◽  
Maricris Zaidem ◽  
Carlos Casal ◽  
Shalabh Dixit ◽  
Tobias Kretzschmar ◽  
...  
Keyword(s):  
Genetic Basis ◽  
Snp Markers ◽  
Nucleotide Polymorphism ◽  
Rice Varieties ◽  
Single Nucleotide ◽  
Genotyping Platform ◽  
Anaerobic Germination ◽  
Direct Seeded ◽  
Mapping By Sequencing ◽  
Simple Sequence

Direct seeded rice (DSR) is a mainstay for planting rice in the Americas, and it is rapidly becoming more popular in Asia. It is essential to develop rice varieties that are suitable for this type of production system. ASD1, a landrace from India, possesses several traits desirable for direct-seeded fields, including tolerance to anaerobic germination (AG). To map the genetic basis of its tolerance, we examined a population of 200 F2:3 families derived from a cross between IR64 and ASD1 using the restriction site-associated DNA sequencing (RAD-seq) technology. This genotyping platform enabled the identification of 1921 single nucleotide polymorphism (SNP) markers to construct a high-resolution genetic linkage map with an average interval of 0.9 cM. Two significant quantitative trait loci (QTLs) were detected on chromosomes 7 and 9, qAG7 and qAG9, with LOD scores of 7.1 and 15.0 and R2 values of 15.1 and 29.4, respectively. Here, we obtained more precise locations of the QTLs than traditional simple sequence repeat and low-density SNP genotyping methods and may help further dissect the genetic factors of these QTLs.

scholarly journals Grain Yield of Hybrid Rice Varieties as Influenced by Seed Rates under Aerobic Direct Seeded Situation

2018 ◽  
Vol 7 (10) ◽  
pp. 2839-2845
Author(s):  
K. Jana ◽  
K. Mondal ◽  
S. Banerjee ◽  
S. Goswami ◽  
R. Mandal ◽  
...  
Keyword(s):  
Grain Yield ◽  
Hybrid Rice ◽  
Rice Varieties ◽  
Direct Seeded

scholarly journals Evaluation of new rice varieties in the conditions of climate change

2020 ◽  
Vol 164 ◽  
pp. 06017 ◽  
Author(s):  
Ruslan Dzhamirze ◽  
Nadezhda Ostapenko ◽  
Sergey Garkusha ◽  
Natalya Chinchenko
Keyword(s):  
Irrigation System ◽  
Yield Response ◽  
Experimental Production ◽  
Milled Rice ◽  
Rice Varieties ◽  
Environmental Testing ◽  
Leading Role ◽  
Sum Of Effective Temperatures ◽  
Economically Valuable Traits ◽  
Variety Testing

In obtaining stable and high rice yields, the leading role belongs to the use of the best varieties, harmoniously combining productivity and technological indicators of grain and milled rice quality, adapted for cultivation in the main rice-growing regions. Therefore, the aim of our research is to evaluate new rice genotypes by a set of economically valuable traits that can replace obsolete varieties in the sowing area of the region and the country as a whole for industry efficiency. Experimental plots of competitive variety testing (CVT) were laid on the territory of the rice irrigation system of the experimental production department of the Federal Scientific Rice Centre, Belozerny, Krasnodar region for three years. The results are processed by analysis of variance and correlation analysis. All new varieties formed dense panicles of 10.0-11.9 pcs / cm with a sufficient number of fertile spikelets 139.7-165.9 pcs. on average, which is responsible for the high grain content of agrophytocenosis 44.1-58.2 thousand units/m2. Hence the high grain yield - 9.2-10.2 t / ha with a good combination of the main technological indicators - the mass of 1000 grains and head rice content. The closeness of the interconnections of the main economically valuable traits and the heat supply of the growing season is determined. Four varieties (except VNIIR 10284) show a neutral yield response to one of the main factors of external influence on the plant - the sum of effective temperatures above 15 ° C. According to the results of the test, for three years in CVT and in the environmental testing, the variety Romans was transferred to State variety testing, VNIIR 10279 is being prepared for transfer.

scholarly journals Traits and QTLs for development of dry direct-seeded rainfed rice varieties

2014 ◽  
Vol 66 (1) ◽  
pp. 225-244 ◽  
Author(s):  
Nitika Sandhu ◽  
Rolando O. Torres ◽  
Ma. Teresa Sta Cruz ◽  
Paul Cornelio Maturan ◽  
Rajinder Jain ◽  
...  
Keyword(s):  
Rice Varieties ◽  
Rainfed Rice ◽  
Direct Seeded

Towards the development of dry direct seeded rice varieties by stacking of multiple QTLs/genes

2018 ◽  
Vol 55 (spl) ◽  
pp. 51 ◽  
Author(s):  
A Anandan ◽  
C Parameswaran ◽  
TP Muhammed Azharudheen ◽  
ON Singh
Keyword(s):  
Rice Varieties ◽  
Direct Seeded

scholarly journals Response of Drought Tolerant Rice (Oryza sativa L.) Varieties under Various Methods of Establishment in Drought-prone Condition of Bihar

2019 ◽  
pp. 1-6
Author(s):  
Rajeev Singh ◽  
Ravi Ranjan Kumar ◽  
Nityanand . ◽  
R. K. Sohane ◽  
Anjani Kumar Singh ◽  
...  
Keyword(s):  
Oryza Sativa L ◽  
Cost Ratio ◽  
Rice Varieties ◽  
Yield Attributes ◽  
Net Return ◽  
Benefit Cost Ratio ◽  
Transplanted Rice ◽  
Drought Tolerant ◽  
Direct Seeded ◽  
Benefit Cost

A field experiment was conducted at Krishi Vigyan Kendra, Aurangabad and in farmers’ field during rainy seasons of 2013, 2014 and 2015, to Performance of drought tolerant rice varieties under various methods of stand establishment in rainfed drought-prone condition of Bihar. Experiment was laid out in a split-plot design with 3 methods of establishment i.e. broad coasting, direct seeded rice (DSR), and transplanted rice (TPR), and two varieties viz. Sahbhagiedhan, SushkeSamrat in a total of 5 replications including four at KVK, Aurangabad and one at farmers’ field during three years. Direct seeding of rice (DSR) with ZTD machine produced significantly higher plant height, number of tillers/m2, panicles/m2, grains/panicle, filled grains/panicle. However panicle length and Panicle weight were recorded maximum with   to transplanting method over Direct seeded rice with ZTD machine and broad coasting. 1000grain weight was recorded significantly maximum with Direct seeded rice with ZTD machine and transplantinh over broad coasting. Direct seed produced 7.60% and 30.95% more yield in 2014, 7.88% and 32.10% more yield in 2014 and 12.00% and 30.23% more yield in 2016 over transplanted and broad coasting rice, respectively. Net return and benefit-cost ratio were also significantly higher in direct seeded rice with ZTD machine than transplanted rice and broad coasting of rice. Amongst the varieties of rice, Sushk Samrat produced significantly higher yield attributes viz., tillers/m2, panicles/m2, grains/panicle, filled grains/panicle and 1000-grain weight, and subsequently produced grain yield higher by 13.42 in 2014, 10.10% in 2015 and by 7.03% in 2016 over Sahbhagie dhan. Net return and benefit-cost ratio were also recorded significantly higher with Sushk Samrat than Sahbhagiedhan.

scholarly journals Feasibility of Improving Cucumber Yield without Chemical Control in Soils Susceptible to Nematode Buildup

HortScience ◽  
1994 ◽  
Vol 29 (10) ◽  
pp. 1136-1138 ◽  
Author(s):  
H.Y. Hanna ◽  
P.D. Colyer ◽  
T.L. Kirkpatrick ◽  
D.J. Romaine ◽  
P.R. Vernon
Keyword(s):  
Chemical Control ◽  
Total Yield ◽  
Dry Weight ◽  
Growth And Yield ◽  
Stem Length ◽  
Yield Response ◽  
Root Knot Nematode ◽  
Double Cropping ◽  
Direct Seeded ◽  
Cucumber Yield

Studies were conducted for 2 years in root-knot-nematode-infested soils to determine growth and yield response of `Dasher II' cucumbers (Cucumis sativus L.) to double-cropping with nematode-resistant tomatoes (Lycopersicon esculentum Mill.), using nematode-free cucumber transplants and preplant treatment with ethoprop nematicide. Cucumbers grown following the nematode-resistant `Celebrity' tomato during the same season produced significantly more plant dry weight, more fruit per plant, and higher premium and total yields than did cucumbers double-cropped with the nematode-susceptible `Heatwave' tomato in both years. The cucumber produced longer stems in 1992 and fewer culls in 1993 following resistant tomatoes. Cucumber plants raised in nematode-free soilless mix for 3 weeks before transplanting produced significantly longer stems and more plant dry weight than did direct-seeded cucumbers in 1992, but not in 1993; however, they produced significantly higher premium yield in both years, and higher total yield, more fruit per plant, and fewer culls in 1993. Preplant treatment with ethoprop significantly increased cucumber stem length, dry weight, premium and total yield, and number of fruit per plant in 1992 but not in 1993. Ethoprop treatment had no effect on the percentage of culls in either year. Chemical name used: O-ethyl S,S-dipropyl phosphorodithioate (ethoprop).

Interactive Effects of Soil pH, Halosulfuron Rate, and Application Method on Carryover to Turnip Green and Cabbage

2010 ◽  
Vol 24 (2) ◽  
pp. 160-164 ◽  
Author(s):  
W. Carroll Johnson ◽  
Timothy L. Grey ◽  
David Kissel
Keyword(s):  
Soil Ph ◽  
Field Studies ◽  
Interactive Effects ◽  
Yield Response ◽  
Yield Data ◽  
Crop Tolerance ◽  
Application Method ◽  
Direct Seeded ◽  
Application Methods ◽  
Turnip Green

Field studies were conducted in 2006 and 2007 to evaluate the tolerance of autumn-planted cabbage and turnip green to halosulfuron applied the previous spring to cantaloupe. Main plots were three levels of soil pH: maintained at a natural pH level, pH raised with Ca(OH)2, and pH lowered with Al2(SO4)3. Subplots were a factorial arrangement of two halosulfuron application methods and three halosulfuron rates. Halosulfuron application methods were PPI or POST after transplanting to the edges of mulch-covered seedbeds. Halosulfuron rates were 35 and 70 g ai/ha, along with a nontreated control. Cantaloupe were transplanted, maintained weed-free, and evaluated for yield response. After cantaloupe harvest, direct-seeded turnip green and transplanted cabbage were established in September of each year and evaluated for crop tolerance and yield. Data indicated nonsignificant main effects of soil pH and halosulfuron application method on cantaloupe yield. However, in 2007 cantaloupe yields were significantly reduced, by 16 and 20% for halosulfuron applied at 35 and 70 g/ha, respectively. For all turnip green and cabbage response parameters, interactions were nonsignificant between application method and rate, soil pH and rate, and soil pH and application method, along with the three-way interaction. After 6 mo, there was no evidence of stunting from halosulfuron carryover in 2006 to direct-seeded turnip green and in both years to transplanted cabbage. Visual estimates of stunting to direct-seeded turnip green ranged from 9 to 16% for halosulfuron at 35 and 70 g/ha, respectively, in 2007, but all stunting was transient and turnip green yield was not affected.

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