Assessment of Variability and Genetic Factors among High Heritable Traits of Juglans regia (Walnut) from North Western Himalayan Regions

IF 1.4 Q3 AGRONOMY Agricultural Research Pub Date : 2024-03-05 DOI:10.1007/s40003-024-00697-8

Munish Sharma, Munit Sharma, Munish Sharma

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Abstract

Juglans regia L. (Walnut) generally renowned as English Walnut or Persian Walnut. It is popular for its quality edible nuts and strong wood resulted into cultivation in wide area. Walnut is a prime member of Juglandaceae family with sporophytic chromosome number 2n = 2x = 32. The Union Territory of Jammu & Kashmir had a significant walnut gene pool represented by seedling trees for decades. The region’s rich walnut diversity in terms of morphology, phenology, biochemical and biological traits is due to presence of the large variability of native Walnut trees. This largely resulted from cross-pollination and seedling propagation. This study was conducted during 2021–2022 in JKUT and Himachal Pradesh. It was based on data collected during a preliminary survey during the current research work. As part of our research, the variability and genetic parameters of nut characters were evaluated to identify and marking of elite walnut genotypes owning superior characteristics and high-quality traits and also to understand the existing genetic variability in walnut germplasm. The data were collected from one hundred two (102) walnut trees located in various geographical regions of JKUT and Himachal Pradesh. We also calculated phenotypic and genotypic variances (PCV and GCV), heritability (in a broad sense), and expected genetic gain (GG percentage of the mean) on the basis of data collected during the research work and resulted into the high heritability (h²) and high to moderate genetic gain (GG) in the walnut species from JKUT and Himachal Pradesh.

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喜马拉雅山西北部地区胡桃（Juglans regia）高遗传性状的变异性和遗传因素评估

Juglans regia L.（核桃）通常被称为英国核桃或波斯核桃。核桃因其优质的食用坚果和坚固的木材而广为种植。核桃属于胡桃科，孢子体染色体数为 2n = 2x = 32。几十年来，查谟和克什米尔联邦直辖区的核桃基因库中一直有大量的核桃苗木。该地区核桃在形态、物候、生化和生物特征方面具有丰富的多样性，这归功于当地核桃树的巨大变异性。这主要是异花授粉和树苗繁殖的结果。本研究于 2021-2022 年期间在吉尔吉斯坦和喜马偕尔邦进行。该研究以当前研究工作中初步调查收集的数据为基础。作为研究的一部分，我们对坚果特征的变异性和遗传参数进行了评估，以确定和标记具有优良特性和高品质特征的核桃精英基因型，同时了解核桃种质中现有的遗传变异性。我们从位于 JKUT 和喜马偕尔邦不同地理区域的一百零二（102）棵核桃树上收集了数据。我们还根据研究工作期间收集的数据计算了表型和基因型方差（PCV 和 GCV）、遗传率（广义）和预期遗传增益（平均值的 GG 百分比），结果显示吉尔吉斯坦工科大学和喜马偕尔邦的核桃品种具有较高的遗传率 (h2) 和较高到中等的遗传增益 (GG)。

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来源期刊

Agricultural Research AGRONOMY-

CiteScore

3.80

自引率

0.00%

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期刊介绍： The main objective of this initiative is to promote agricultural research and development. The journal will publish high quality original research papers and critical reviews on emerging fields and concepts for providing future directions. The publications will include both applied and basic research covering the following disciplines of agricultural sciences: Genetic resources, genetics and breeding, biotechnology, physiology, biochemistry, management of biotic and abiotic stresses, and nutrition of field crops, horticultural crops, livestock and fishes; agricultural meteorology, environmental sciences, forestry and agro forestry, agronomy, soils and soil management, microbiology, water management, agricultural engineering and technology, agricultural policy, agricultural economics, food nutrition, agricultural statistics, and extension research; impact of climate change and the emerging technologies on agriculture, and the role of agricultural research and innovation for development.