Genetic Erosion from Modern Varieties into Traditional Upland Rice Cultivars (Oryza sativa L.) in Northern Thailand

2006 ◽  
Vol 53 (2) ◽  
pp. 245-252 ◽  
Author(s):  
R. Ishikawa ◽  
S. Yamanaka ◽  
Y. Fukuta ◽  
S. Chitrakon ◽  
C. Bounphanousay ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Genetic Erosion ◽  
Rice Cultivars ◽  
Northern Thailand ◽  
Modern Varieties

scholarly journals Genetic diversity analysis of local upland rice cultivars (Oryza sativa L.) from north provinces of Vietnam

2012 ◽  
Vol 32 (1) ◽  
Author(s):  
Nguyen Thi Ngoc Lan ◽  
Nguyen Vu Thanh Thanh ◽  
Chu Hoang Mau ◽  
Nguyen Nhu Khanh
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Diversity Analysis ◽  
Rice Cultivars ◽  
Genetic Diversity Analysis

scholarly journals Crossing rate and distance in upland rice

Bragantia ◽  
2005 ◽  
Vol 64 (2) ◽  
pp. 197-201 ◽  
Author(s):  
Edson Ferreira da Silva ◽  
Lucielio Manoel da Silva ◽  
Ricardo Montalván
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
The State ◽  
The Other ◽  
Rice Cultivars ◽  
Other Hand ◽  
Autogamous Species ◽  
Four Blocks ◽  
Natural Crossing

Rice (Oryza sativa L.) is an autogamous species that shows natural crossing rates of up to 3%, where the variations are influenced by genotypes and environments. The present work aimed to evaluate the rates and distances of natural crossing between the upland rice cultivars Guarani and IAC 201. The study was done in the counties of Carpina and Recife, in the State of Pernambuco during the agricultural years of 2001 and 2002, respectively. The Guarani cultivar presents leaf pilosity conditioned by the dominant alleles HLHL and this character was used as a morphologic tracer. On the other hand, the IAC 201 cultivar does not show pilosity because it carries the recessive alleles (hlhl). The experiments were composed of four blocks, constituting of ten circunscribed rows of the cultivar under study, spaced 50 cm between themselves, and in the center of each block the Guarani cultivar was planted. The natural crossing rate and distance were evaluated in the plants resulting from the seeds of the IAC 201 cultivar from natural crossing, expressing pilosity in the leaves. After the evaluation of the plants arising from the first two rows of the experiment carried out in Carpina and the first three rows of the experiment done in Recife, it was concluded that in the first row (0.5 m) there were plants resulting from natural crossing. At this distance, the average crossing rate in Carpina was 0.30% while that in Recife was 0.35%.

Effects of sorbitol on expression of genes involved in regeneration of upland rice (Oryza sativa L.)

2011 ◽  
Vol 106 (3) ◽  
pp. 455-463 ◽  
Author(s):  
Xiaolei Feng ◽  
Pengke Zhao ◽  
Jianqin Hao ◽  
Jinquan Hu ◽  
Dingming Kang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Expression Of Genes

scholarly journals Growth performance of several promising local upland rice (Oryza sativa L.) genotypes of Southeast Sulawesi

2021 ◽  
Vol 807 (4) ◽  
pp. 042080
Author(s):  
T Wijayanto ◽  
Ramdayani ◽  
Arditya ◽  
Asniah ◽  
N W S Suliartini ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Growth Performance ◽  
Upland Rice ◽  
Oryza Sativa L

The effect of harvest date on yield loss of long and short-grain rice cultivars (Oryza sativa L.) in Northeast China

2021 ◽  
Vol 131 ◽  
pp. 126382
Author(s):  
Jinwu Wang ◽  
Xiaobo Sun ◽  
Yanan Xu ◽  
Qi Wang ◽  
Han Tang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Northeast China ◽  
Yield Loss ◽  
Oryza Sativa L ◽  
Harvest Date ◽  
Rice Cultivars

Genetic Diversity of Local Upland Rice (Oryza sativa L.) Genotypes Based on Agronomic Traits and Yield Potential in North Buton, Indonesia

2017 ◽  
Vol 9 (4) ◽  
pp. 109-117 ◽  
Author(s):  
Budianti Kadidaa ◽  
Gusti Ray Sadimantar ◽  
Suaib . ◽  
La Ode Safuan ◽  
Muhidin .
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Agronomic Traits ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Yield Potential

scholarly journals Yield performance of upland rice cultivars at different rates and times of nitrogen application

2012 ◽  
Vol 36 (2) ◽  
pp. 475-483 ◽  
Author(s):  
José Hildernando Bezerra Barreto ◽  
Ismail Soares ◽  
José Almeida Pereira ◽  
Antonio Marcos Esmeraldo Bezerra ◽  
José Aridiano Lima de Deus
Keyword(s):  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
N Fertilization ◽  
Rice Cultivars ◽  
Nitrogen Application ◽  
N Application ◽  
Yield Performance ◽  
Randomized Block Design ◽  
N Rates

Nitrogen is the most important nutrient for rice (Oryza sativa L) yields. This study aimed to evaluate the response of upland rice cultivars to N rate and application times in a randomized block design, in subdivided plots with four replications. The studied factors were five rice cultivars (BRS MG Curinga, BRS Monarca, BRS Pepita, BRS Primavera, and BRS Sertaneja), three application times (100 % at planting, 50 % at planting - 50 % at tillering and 100 % at tillering) and four N rates (0, 50, 100, and 150 kg ha-1). All cultivars responded to increased rates and different times of N application, especially BRS Primavera and BRS Sertaneja, which were the most productive when 50 % N rates were applied at sowing and 50 % at tillering. The response of cultivar BRS Monarca to N fertilization was best when 100 % of the fertilizer was applied at tillering.

scholarly journals Análisis Prospectivo de la Detección Hiperespectral de Cultivos de Arroz (Oryza Sativa L.)

2018 ◽  
Vol 3 (1) ◽  
pp. 69
Author(s):  
Jorge Serrano ◽  
José Fábrega ◽  
Evelyn Quirós ◽  
Javier Sánchez- Galán ◽  
José Ulises Jiménez
Keyword(s):  
Principal Component Analysis ◽  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Principal Component ◽  
Field Measurements ◽  
Spectral Signature ◽  
Prospective Analysis ◽  
Rice Cultivars ◽  
Crop Varieties ◽  
Nm Range

The objective of this work is to perform a prospective analysis of the wavelengths that can be used to recognize a rice crop due to its phenological status and variety. For this purpose, field measurements of spectral signature in the 350 nm -1049 nm range were employed. The rice cultivars FCA 616FL and IDIAP 54-05 were used. The study site was located in the Juan Hombrón area in the Coclé province, Panama. A principal component analysis (PCA) was carried out, which resulted in the lengths 728.16, 677.89 and 785.48 nm let phenological differentiation within the cultivar FCA 616FL and IDIAP 54-05, the lengths 729.72, 814.58 and 666.81 nm let distinguish between crop varieties FCA 616FL and IDIAP 54-05 in vegetative phase.Keywords: Rice, reflectance, hyperspectral signature, phonological state.

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