Genetic variability, character association and path coefficient analysis in rice (Oryza sativa) genotypes of semi-arid region of India

IF 0.3 4区农林科学 Q4 AGRICULTURE, MULTIDISCIPLINARY

Indian Journal of Agricultural Sciences Pub Date : 2023-08-30 DOI:10.56093/ijas.v93i8.137199

ALOK KUMAR SINGH, D K DWIVEDI, DEVENDRA KUMAR, ASHUTOSH SINGH, SAURABH DIXIT, N A KHAN, ADESH KUMAR

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Abstract

A field experiment was conducted during rainy (kharif) seasons of 2021 and 2022 at research farm of Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya, Uttar Pradesh to find out genetic variations, trait association and path coefficient among 116 rice (Oryza sativa L.) genotypes based on grain yield and yield attributes. Variance analysis displayed extensive trait-wise variations across genotypes, indicated variability and opportunity for genetic selection of desirable traits. All the studied characters showed minimum influence of environment on the expression of trait and genetic factors. High heritability in broad sense (h2 b) and high to moderate genetic advance in per cent of the mean were recorded for all the characters. Genetic factors showed significant influence on the expression of traits, with high heritability and moderate genetic advance. Genotypic correlation with grain yield and path analysis revealed selection based on plant height, harvest index, biological yield per plant, flag leaf area, spikelet fertility, number of spikelets per panicle and seedling vigour will be more effective for increasing grain yield.

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印度半干旱区水稻(Oryza sativa)基因型的遗传变异、性状关联及通径分析

于2021年和2022年雨季，在印度北方邦阿约提亚邦库马甘吉的Acharya Narendra Deva农业技术大学研究农场进行了田间试验，以籽粒产量和产量属性为基础，研究了116种水稻(Oryza sativa L.)基因型的遗传变异、性状关联和通径系数。方差分析显示，基因型之间存在广泛的性状差异，表明了理想性状的遗传选择的可变性和机会。环境对性状和遗传因子表达的影响最小。所有性状均具有广义上的高遗传力(h2 b)和高至中等的遗传进步(平均百分比)。遗传因素对性状的表达影响显著，遗传力高，遗传进阶适中。与籽粒产量的基因型相关分析和通径分析表明，以株高、收获指数、单株生物产量、旗叶面积、小穗育性、每穗小穗数和幼苗活力为选择依据，对提高籽粒产量更为有效。

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来源期刊

Indian Journal of Agricultural Sciences 农林科学-农业综合

CiteScore

0.80

自引率

25.00%

发文量

273

审稿时长

6 months

期刊介绍： The Indian Journal of Agricultural Sciences publishes papers concerned with the advancement of agriculture throughout the world. It publishes original scientific work related to strategic and applied studies in all aspects of agricultural science and exploited species, as well as reviews of scientific topics of current agricultural relevance. Specific topics of interest include (but are not confined to): genetic resources, all aspects of crop improvement,crop production,crop protection, physiology, modeling of crop systems, the scientific underpinning of agronomy, engineering solutions, decision support systems, land use, environmental impacts of agriculture and forestry, impacts of climate change, rural biodiversity, experimental design and statistical analysis, the application of new analytical and study methods (including molecular studies) and agricultural economics. The journal also publishes book reviews. Articles are accepted on the following broad disciplines: Agric. Engineering & Technology, Agric. Social & Economic Sci., Agronomy, Biometry, Biosciences, Cytology, Ecology, Environmental Sciences, Fertilization, Forestry , Genetics, Horticultural Sciences, Microbiology, Pest, Weed Control etc., Molecular Biology, Plant Pathology, Plant Breeding, Physiology and Biochemistry, Soil Sciences, Special Cultivation Technology, Stress Breeding, Agric. extension, and Cell Biology.