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eISSN: 2083-5906
ISSN: 1230-1485
ISSN: 1230-1485
ORIGINAL RESEARCH
Quantitative Characteristics of Rice Grain Quality
Traits and Genetic Parameters in Some Hybrid
and Inbred Rice Genotypes
1
Agricultural Biotechnology Department, College of Agricultural and Food Science, King Faisal University,
Al-Ahsa, 31982, Saudi Arabia
2
Rice Research and Training Center, Field Crop Research Institute, Agriculture Research Center, Giza, 33717, Egypt
3
Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, Cairo, 11341, Egypt
4
Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University,
Al-Ahsa, 31982, Saudi Arabia
Submission date: 2025-06-04
Final revision date: 2025-07-12
Acceptance date: 2025-07-23
Online publication date: 2025-10-13
Corresponding author
Adel A. Rezk
Agricultural Biotechnology Department, College of Agricultural and Food Science, King Faisal University, Al-Ahsa, 31982, Saudi Arabia
Agricultural Biotechnology Department, College of Agricultural and Food Science, King Faisal University, Al-Ahsa, 31982, Saudi Arabia
Heba I. Mohamed
Ain Shams University, Faculty of Education, Biological and Geological Sciences Department, Egypt
Ain Shams University, Faculty of Education, Biological and Geological Sciences Department, Egypt
KEYWORDS
TOPICS
ABSTRACT
Rice grain quality characteristics are crucial in modern breeding programs. This study evaluated
eight rice genotypes from Japonica, Indica, Indica-Japonica varieties, and hybrids. Additionally,
the characteristics of paddy and milled grains, the correlation between these characteristics,
and the degree of similarity between the genotypes under study were also included. ANOVA showed
significant differences (p < 0.01) among all genotypes. Indica types had larger grain shapes compared
to Japonica, which yielded higher total white rice and milling percentages but lower amylose percentages.
The phenotypic coefficient of variation exceeded the genotypic coefficient for all traits. Heritability
estimates ranged from 29.88% for breakage in white rice to 98.45% for elongation. Significant positive
correlations were noted among traits like paddy grain shape and amylose percentage, while negative
correlations existed between paddy grain width and several other traits. Principal component analysis
identified eight grain traits with a total variance of 99.55% in grain quality. Cluster analysis grouped
the studied genotypes into two groups: the first group included the two Indica hybrids (Hybrid
27P31 and Hybrid 28P67), while the second group included the remaining genotypes divided into
two sub-groups. The Japonica types (Sakha101, Sakha108, Sakha104, and Giza177) were closely
clustered in one sub-group, while the last sub-group included the Giza182 variety of Indica type and
Egyptian hybrid1, which is an Indica-Japonica type.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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