Head rice

Rice plants are sensitive to the agro-climate conditions, being photoperiod one of main factor contributing to their adaptation to the region where they are grown. Dissecting the genetic bases underlying diversity in rice populations adapted to specific environmental conditions is a fundamental resource for breeding. In this study we have analysed a collection of japonica varieties adapted to temperate regions to perform association studies with traits of high agronomical interest such as heading date, plant height, number of panicles, panicle length and number of grains per panicle.

11p vitzuyu2711 29-09-2021 17 1   Download

This study was aimed at quantifying yield loss due to high temperature induced damages on head rice recovery in rice. Fifteen rice varieties were evaluated over 3 seasons and their head rice recovery was estimated. Results of this study revealed that day temperature had no influence on the head rice recovery whereas night temperature had negative impact on head rice recovery at p < 0.05.

6p trinhthamhodang1218 26-02-2021 9 1   Download

This review pertinent to the present investigation entitled, "Effect of continuous application of fertilizers and manures on soil physical properties, nutrient uptake, growth and yield of rice on Chromustert” has been reviewed in this chapter under the following heads: I. Effect of continuous application of inorganic fertilizer and organic manures on soil physico-chemical properties.

12p cothumenhmong9 18-01-2021 9 1   Download

Among the major cereals of world, rice tops both in production and consumption. The production has increased manifolds but the losses during the post-harvest needs to be checked. The quality of rice is judged from the head rice yield (HRY). This paper reviews the various studies conducted affecting the head rice yield during the last 6 decades. It gives a detailed outline of various post-harvest processes, milling treatments, factors and latest technologies used in improving quality and production of head rice.

18p gaocaolon9 22-12-2020 12 1   Download

Brown rice recovery, milled rice recovery and head milled rice recovery are the three essential parameters of milling quality. The selected rice varieties, namely, Anjana (JGL-11118) and Pradhyumna (JGL-17004) were analysed for milling quality characteristics.

3p caygaocaolon8 07-11-2020 10 1   Download

In this paper, we review the characteristics of domestication-related seed traits and heading dates in rice, including the key genes controlling these traits, the differences in allelic diversity between wild rice and cultivars, the geographic distribution of alleles, and the regulatory pathways of these traits. A comprehensive comparison shows that these genes contributed to rice domestication and its global expansion. In addition, these traits have also experienced parallel evolution by artificial selection on the homologues of key genes in other cereals.

18p loctlt123 26-10-2020 7 1   Download

In the light of the above context the present study was undertaken to investigate the effect of water and nitrogen management practices to improve the yield, grain quality and soil microbial activities of DSR.

7p cothumenhmong7 09-09-2020 9 1   Download

The paper presents results of study on the milling characteristics of Padmini variety of paddy in laboratory model equipments and to compare the milling recovery in a huller and single pass rice mill. From the study, it was concluded that the slenderness ratio of paddy is 4.16. The husk content and bran content of Padmini variety of paddy is 18 and 5.65 %, respectively.

6p kethamoi7 26-08-2020 6 2   Download

Physicochemical test relies on the chemical composition of rice, viz cooking quality, gelatinization temperature and physical properties. To evaluate the milling characteristics of 10 different paddy genotypes were taken. All genotypes had different dimensions, the average length varied from 8.77 to 9.88 mm, average width varied from 2.02 to 3.09 mm, Average test weight varied from 27.12 to 30.19g, Bulk density and true density varied from 0.59 to 0.68 g/ml3 and 1.12 to 1.44 g/ml3 , Angle of repose 29.37 to 32.45 respectively.

7p angicungduoc6 22-07-2020 9 1   Download

Studies on subsurface drainage were carried out on silty clay and clay soils in Gundur village from 2015 to 2016. The mean pH of samples ranged from 8.16 to 8.35 before sowing and 8.21 to 8.41 after harvesting and before sowing the electrical conductivity ranged from 10.92 to 14.65 dS m-1 and 9.28 to 13.68 dS m-1 after harvesting.

9p nguathienthan5 04-06-2020 9 0   Download

Plant hormones are well known regulators which balance plant responses to abiotic and biotic stresses. We investigated the role of abscisic acid (ABA) in resistance of barley (Hordeum vulgare L.) against the plant pathogenic fungus Magnaporthe oryzae.

13p viminato2711 22-05-2020 10 1   Download

The present investigation was carried out during Kharif 2016 and 2017 at AICRIP, Agricultural Research Station, Mugad, UAS, Dharwad. Among 37 characters studied, the variation was observed in 30 characters viz.

8p cothumenhmong5 17-05-2020 15 2   Download

Heading date, a crucial factor determining regional and seasonal adaptation in rice (Oryza sativa L.), has been a major selection target in breeding programs. Although considerable progress has been made in our understanding of the molecular regulation of heading date in rice during last two decades, the previously isolated genes and identified quantitative trait loci (QTLs) cannot fully explain the natural variation for heading date in diverse rice accessions.

16p vihashirama2711 21-05-2020 14 0   Download

Rice is highly sensitive to temperature fluctuations. Recently, the frequent occurrence of high temperature stress has heavily influenced rice production. Proper heading date in specific environmental conditions could ensure high grain yield.

11p vichoji2711 29-04-2020 16 1   Download

Flowering time is one of the most important agronomic characteristics that ultimately determine yield potential and eco-geographical adaptation in crops. Ghd8 and Ghd7, two major flowering genes, have similar functions and large pleiotropic effects in controlling the heading date, plant height and grain yield of rice.

14p viharuno2711 21-04-2020 13 0   Download

Field experiment on “Performance of photo sensitive Rice cv. RNR 15048 (Telangana Sona) under varied nitrogen levels and environmental conditions” was carried out during Kharif 2016 at Agricultural Research Institute, Rajendranagar, Hyderabad. The experiment was laid out in split plot design with five dates of sowing [5 Jun (D1), 20 Jun (D2), 5Jul (D3), 20Jul (D4) and 5 Aug (D5)] as main plots and two nitrogen levels (N1: 120 kg N ha-1 ; N2: 160 kg N ha-1 ) as sub-plots replicated thrice. Flowering duration of rice was influenced by dates of sowing.

4p trinhthamhodang1212 06-04-2020 18 0   Download

Field studies on the effect of organic and inorganic sources of silicon against yellow stem borer in rice revealed the superiority of calcium silicate at 2t/ha and diatomaceous earth at 0.45t/ha in arresting stem borer damage with a record of average 5.84 – 11.97 % dead heart (DH) and 2.56 – 8.84% white ear head (WEH) as against 14.75 – 21.34 % DH and 8.35-14.93% WEH in control. At vegetative and heading stages both the treatments resulted in up to 60% and 69% decline in borer damage.

8p cothumenhmong4 25-03-2020 29 1   Download

Paddy drying experiments were conducted in Solar greenhouse dryer during paddy growing seasons namely kharif and Rabi at three different bed thicknesses (5, 10 and 15 cm). Milling quality analysis showed that there was no significant effect of season, replication and interaction of season and thickness on brown rice yield, milling recovery and head rice yield, however, grain bed thickness had a significant effect at 5% significant level. Highest head rice yield of 66.4% was achieved at 10 cm bed thickness, as compared to 62.9% and 65.4% for 5 and 15 cm beds thickness, respectively.

10p caygaocaolon3 09-03-2020 7 0   Download

Global demand for organically grown foods is increasing and organic agriculture is growing fast in recent years. Organic farming encourages the reduction of agrochemicals and promotes soil conservation principles. Field experiment was conducted at Krishi Nagar, Research Farm, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (MP) during kharif season 2018. Experiment was carried out using randomized complete block design involving twelve scented and non scented rice (Oryza sativa L.) varieties with three replications. An improved scented varieties viz.

8p caygaocaolon3 27-02-2020 25 0   Download

False smut disease caused by Ustilaginoidea virens (Cooke) (Takahashi) is a grain disease of rice that converts whole grain into powder (smut balls) form. Disease infestation leads to sterile spikelets and reduction in 1000 grain weight. Considering the importance of disease the experiment was carried out to assessment of IDM module with Propiconazole and Carbendazim in rice through on field trials (OFT) against false smut disease in Kabirdham district of Chhattisgarh.

5p caygaocaolon3 27-02-2020 15 0   Download