Mohamed El-Malky

Rice Research and Training Center, Egypt · Plant Breeding

R ice (Oryza sativa) is an important cereal crop that is affected by sowing date and some cultural practices. A two-year experiment was conducted at the Farm of Sakha Agric. Res. Stn., Kafr El-Sheikh, Egypt during 2012 and 2013 growing season to study the effect of sowing date (20th of April, 10th of May and 1st of June) and the leaf clipping (with...

Twenty-four rice genotypes were examined to assess genetic variability, heritability, and correlations for seven-grain quality traits, eight nutritional elements, and protein. ANOVA revealed significant differences for the quality traits studied. For every trait under study, the phenotypic coefficient of variation was higher than the correspondence...

Conventional breeding is vital in improving yield-related traits and developing high-yielding cultivars. In the presented study, an evaluation of 15 F1 hybrids compared them to their six parental genotypes for genetic variation of various traits. The results showed that the analysis of variance revealed significant (P ≤ 0.01) differences among the...

This research was carried out to estimate the genetic parameters of 15 F1 and F2 generations are produced from the crosses between six rice varieties namely; Sakha105, Sakha106, Sakha108, Sakha102, Giza179, and Sakha109. The half dialel growing method was used and it was cultivated during three successful seasons in the period 2019-2021. The mean p...

Climate change is one of the biggest threats to plant species around the world. As one of the most important crops worldwide, rice is an awfully climate-sensitive agro-ecosystem. Therefore, Giza 183 will be released in 2023 as a high-yielding variety that has been adapted to mitigate climate change. This new variety is the product of cross-breeding...

In this paper, the genetic diversities of 12 rice genotypes (Oryza sativa L.), representing Indica, Japonica, and Indica–Japonica varieties, were assessed using twelve ISSR and five SSR markers. In addition, the rice genotypes were evaluated for 11 agro-morphological traits in a two-year trial. Association mapping was performed to detect any associ...

Monogenic lines, which carried 23 genes for blast resistance were tested and used donors to transfer resistance genes by crossing method. The results under blast nursery revealed that 9 genes from 23 genes were susceptible to highly susceptible under the three locations (Sakha, Gemmeza, and Zarzoura in Egypt); Pia, Pik, Pik-p, Piz-t, Pita, Pi b, Pi...

Monogenic lines, which carried 23 genes for blast resistance were tested and used donors to transfer resistance genes by crossing method. The results under blast nursery revealed that 9 genes from 23 genes were susceptible to highly susceptible under the three locations (Sakha, Gemmeza, and Zarzoura in Egypt); Pia, Pik, Pik-p, Piz-t, Pita, Pi b, Pi...

Rice stem borer (Chilo agamemnon Bles.) is a primary insect pest of rice and is a major limiting factor to rice production. Breeding for insect-resistant crop varieties has been an economic way of integrated pest management (IPM) as it offers a viable and ecologically acceptable approach. This study was aimed to evaluate rice genotypes for their re...

Sakha107 was released in 2016 as a high yielding cultivar, good grain quality and short stature with earliness under water shortage in Egypt. Sakha107 was developed from single crossing between Giza 177 and BL1. The cross had initiated in 2000, as F1 then was forward to F2– F5 segregating populations and advanced up to 2006 to reach stability, unif...

Genetic analyses of seedling vigor and important agronomic traits were studied in the laboratory and field at the Experimental Farm of Rice Research and Training Center (RRTC) during 2019 and 2020 to find suitable rice genotypes having greater early vigor. Seedling vigor, genotypes performance , phenotypic and genotypic coefficient of variability,...

Ten rice genotypes were crossed in a line x tester mating design using four testers and six lines to produce 24 hybrids. Analysis of variance showed highly significant differences among genotypes for all the studied traits indicating a wide range of genetic diversity, different origin of these parents and prevalence of additive variance. However, m...

Molecular identification of major blast resistance (R) genes in rice was performed in a group of 10 rice (Oryza sativa) genotypes from Egypt and Saudi Arabia using six DNA markers (T8042, NSB, YL153/YL154, RM3843, RM3330, and z4794) belonging to three classes: single-nucleotide polymorphisms (SNPs), simple sequence repeats (SSRs), and insertion-del...

Background and Objective: The main disease constraint for rice production in the world is blast, caused by Pyricularia grisea. Traditional breeding is one of most economic methods to produce durable resistance. The aim of the study was to develop some promising resistant lines between American and Egyptian in order to study their genetic parameters...

Genetic Components and Correlation Coefficient for Earliness and Grain Yield in Rice

The present research was conducted to study earliness and their correlations with grain yield in rice breeding. It was carried out during 2012 and 2013 growing seasons at RRTC Farm, Sakha, Kafr El- Sheikh, Egypt. F1 were evaluated along with their parents for genotypic variation. ANOVA revealed significant differences at the 0.01 level among crosse...

The breeding of rice varieties with higher levels of vitamins and the ability to resist disease has become one of the most important goals in plant breeding programmes. In this experiment, 24 F1s were produced through Line × Tester and evaluated with their parents for genotypic variation. Both general combining ability (GCA) variances were highly s...

The present study investigation was carried out at the Experimental Farm of Rice Research and Training Center (RRTC), Sakha, Kafr El-Sheikh, Egypt, during the three successive growing seasons of 2014, 2015 and 2016. Four rice genotypes namely; Sakha 101, Sakha 102, Sakha103 and Sakha 104 were used as Lines and four monogenic lines; i.e., IRBLKS-S,...

In Makkah, Saudi Arabia, there is an impending risk of imported malaria. This risk comes from the fact that millions of people, in majority from tropical and subtropical countries where malaria is endemic, visit the country to perform Hajj and Umrah every year. Moreover, millions of expatriates from endemic countries come to Makkah for work. Likewi...

Grain yield of rice is a complex trait consisting of several yield parameters. It is of great necessary to reveal the genetic relationships between GY and its yield components. Therefore, the correlation of agronomic traits contributed of grain yield will be a supplemental advantage in providing the selection process. The objective of this study wa...

Combining ability analysis was carried out in rice, through A 6 x 6 diallel set analysis (excluding reciprocals) for some agronomic and yield components traits as well as blast reaction at the Experimental Farm of Sakha Agricultural Research station, Sakha, Kafr El-Sheikh, Egypt during 2015 and 2016 summer seasons. The ratio of variances due to gen...

Two experiments were conducted in this study, the first one was conducted at the Institute of Genetic Engineering and Bio Technology, Menoufia University Sadat branch using SSR markers during 2013. The second one was carried out at Rice Research and Training Center Sakha, Kafr El-Sheikh, Egypt during 2005 to 2013 season. Seven genotypes comprise fi...

Two experiments were conducted in this study, the first one was conducted at Institute of Genetic Engineering and Bio Technology, Menoufia University Sadat branch using SSR markers during 2013. The second one was carried out at Rice Research and Training Center Sakha, Kafr El-Sheikh, Egypt during 2005 to 2013 season. Seven genotypes comprise five d...

Two field experiments were carried out at the farm of Rice Research and Training Center (RRTC), Sakha, Kafr El-Sheikh, Field Crops Research Institute (FCRI), Agricultural Research Center (ARC), Egypt, during 2008 and 2009 seasons, to evaluate some promising aromatic rice varieties (Egyptian Yasmin, IR77510-88-1-3-3, IR78530-45-3-1-3, IR 74052-177-3...

Two field experiments were conducted at the Experimental Farm of Rice Research and Training Center, Sakha, Kafer El-Sheikh, Egypt during the rice growing seasons of 2009 and 2010 to evaluate the response of different rice genotypes namely, GZ8455, GZ8450, GZ7576, GZ8479, GZ8126, GZ7769, GZ7764 and GZ6522 (Sakha105) to various nitrogen levels (0, 40...

Two field experiments were conducted at the Experimental Farm of Rice Research and Training Center, Sakha, Kafer El-Sheikh, Egypt during the rice growing seasons of 2009 and 2010 to evaluate the response of different rice genotypes namely, GZ8455, GZ8450, GZ7576, GZ8479, GZ8126, GZ7769, GZ7764 and GZ6522 (Sakha105) to various nitrogen levels (0, 40...

A study was conducted at Rice Research Training Centre, Sakha, Kafr Al Sheikh, Egypt during 2003-2006. Forty-six lines were selected from four populations. These populations were produced from five parents namely; M204, M202 and 98-Y-116 (American varieties) that were used as highly susceptible varieties and two Egyptian (Giza177 and Sakha102) as r...