West Africa Centre for Crop Improvement (WACCI), College of Basic and Applied Sciences, University of Ghana, Legon, Ghana.
International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria.
Plant Genome. 2024 Jun;17(2):e20469. doi: 10.1002/tpg2.20469. Epub 2024 Jun 16.
The starchy storage roots of cassava are commonly processed into a variety of products, including cassava granulated processed products (gari). The commercial value of cassava roots depends on the yield and quality of processed products, directly influencing the acceptance of new varieties by farmers, processors, and consumers. This study aims to estimate genetic advance through phenotypic selection and identify genomic regions associated and candidate genes linked with gari yield and quality. Higher single nucleotide polymorphism (SNP)-based heritability estimates compared to broad-sense heritability estimates were observed for most traits highlighting the influence of genetic factors on observed variation. Using genome-wide association analysis of 188 clones, genotyped using 53,150 genome-wide SNPs, nine SNPs located on seven chromosomes were significantly associated with peel loss, gari yield, color parameters for gari and eba, bulk density, swelling index, and textural properties of eba. Future research will focus on validating and understanding the functions of identified genes and their influence on gari yield and quality traits.
木薯的淀粉储存根通常被加工成各种产品，包括木薯颗粒加工产品（gari）。木薯根的商业价值取决于加工产品的产量和质量，这直接影响农民、加工商和消费者对新品种的接受程度。本研究旨在通过表型选择估计遗传进展，并鉴定与 gari 产量和质量相关的基因组区域和候选基因。与广义遗传力估计相比，大多数性状的单核苷酸多态性（SNP）基础遗传力估计更高，这突出了遗传因素对观察到的变异的影响。使用基于 188 个克隆的全基因组关联分析，这些克隆使用 53150 个全基因组 SNP 进行基因分型，在七个染色体上发现了九个与去皮损失、gari 产量、gari 和 eba 的颜色参数、体密度、膨胀指数和 eba 的质地特性显著相关的 SNP。未来的研究将集中于验证和理解鉴定基因的功能及其对 gari 产量和质量性状的影响。
