Genetic Variability and Combining Abilities for Earliness to Nut Yield and Nut Weight in Selected Cashew (Anacardium Occidentale L.) Clones

IF 2.4 3区农林科学 Q2 HORTICULTURE International Journal of Fruit Science Pub Date : 2022-05-10 DOI:10.1080/15538362.2022.2070575

P. Adu-Gyamfi, Michael Barnnor, A. Akpertey, F. Padi

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引用次数: 1

Abstract

ABSTRACT Introduction of exotic clones into the pedigree of commercial cashew clones could constitute a viable strategy to overcome the current low early nut yield and nut weight of the crop in West Africa. The aim of this study was to assess the combining abilities of Beninese, Brazilian and Ghanaian clones for early nut yield and nut weight. Twelve F1 hybrids were evaluated in the field for five traits such as stem diameter increment, canopy spread, nut yield, nut weight and cropping efficiency. Significant difference (p ≤ .01) was observed for most of the traits. Nut weight varied from 5.3 to 10.1 g/year, whilst nut yield ranged from 666.1 to 872.8 kg/ha/year among the top five crosses in the third to fifth year after planting. The Beninese (BE) progenies were comparable to the Ghanaian (SG) progenies for early nut yield but inferior to the Ghanaian and Brazilian (A) progenies for nut weight. Pearson correlation coefficient estimate (r = 0.74; p ≤ .01) suggest that, selecting for canopy spread in the north-south direction might improve early nut yield. GCA effects were more important than SCA effects. Narrow-sense heritability was moderate and exceeded 50% for all the traits. BE203 and SG224 showed positive GCA for early nut yield, whereas A2 and SG273 showed positive GCA for nut weight. Our study suggest that the Brazilian, Beninese and Ghanaian clones had different merits as potential parents for early nut yield and nut weight and could constitute a suitable genetic resource for improving cashew productivity.

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精选腰果(Anacardium Occidentale L.)产量和重量早期遗传变异及配合力克隆

将外来无性系引入到商业腰果无性系谱系中，可能是克服目前西非腰果作物早期坚果产量和坚果重量低的可行策略。本研究的目的是评价贝宁、巴西和加纳的无性系在早期坚果产量和坚果重量方面的配合力。对12个F1杂交种进行了茎粗增长、冠层铺展、果实产量、果实重和种植效率等5个性状的田间评价。大部分性状差异显著(p≤0.01)。种植后第3 ~ 5年，前5个杂交组合的坚果重在5.3 ~ 10.1 g/年之间，坚果产量在666.1 ~ 872.8 kg/公顷/年之间。在早期坚果产量方面，贝宁(BE)后代与加纳(SG)后代相当，但在坚果重量方面，贝宁(BE)后代不如加纳和巴西(A)后代。Pearson相关系数估计(r = 0.74;P≤0.01)表明，选择南北向的冠层铺展可以提高早期坚果产量。GCA效应比SCA效应更重要。狭义遗传力中等，所有性状的遗传力均超过50%。BE203和SG224对早期坚果产量的GCA呈阳性，而A2和SG273对坚果重量的GCA呈阳性。我们的研究表明，巴西、贝宁和加纳的无性系作为早期坚果产量和坚果重量的潜在亲本具有不同的优点，可以作为提高腰果产量的合适遗传资源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Fruit Science Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

6.40

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： The International Journal of Fruit Science disseminates results of current research that are immediately applicable to the grower, extension agent, and educator in a useful, legitimate, and scientific format. The focus of the journal is on new technologies and innovative approaches to the management and marketing of all types of fruits. It provides practical and fundamental information necessary for the superior growth and quality of fruit crops. This journal examines fruit growing from a wide range of aspects, including: -genetics and breeding -pruning and training -entomology, plant pathology, and weed science -physiology and cultural practices -marketing and economics -fruit production, harvesting, and postharvest