Genetic-molecular characterization in guava full-sib progeny

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY
J. A. Oliveira, E. Santos, A. Viana, F. Walter, Rodrigo Moreira Ribeiro
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引用次数: 2

Abstract

: Brazil is one of the world’s largest producers of guava ( Psidium guajava L.), a very promising fruit in the northern region of the state of Rio de Janeiro. Despite this, no guava cultivar has been developed for the region. Thus, this study proposed to examine a population of guava full sibs using microsatellite markers and to identify which genotypes are the most divergent for future crosses, to select cultivars better adapted to the soil and climatic conditions of northern Rio Janeiro. Ninety-six superior genotypes were selected according to their agronomic traits, which were characterized using 45 microsatellite markers. The genetic distance between the analyzed genotypes, their clustering pattern and the genetic structure of the population were estimated. Hierarchical cluster analysis by the neighbor joining method indicated the formation of three distinct groups. The use of molecular information revealed the existence of moderate genetic variability between the genotypes of the full-sib families. Bayesian analysis separated the genotypes into only two groups, as the individuals shared most of the analyzed genomic regions. The most genetically divergent guava genotypes, that is, those allocated to different groups, such as genotypes 5 and 85, should be recommended for future crosses to obtain segregating populations, thus giving continuity to the guava breeding program.
番石榴全同胞后代的遗传分子特征
巴西是世界上最大的番石榴(Psidium guajava L.)生产国之一,番石榴是巴西里约热内卢州北部地区一种非常有前途的水果。尽管如此,该地区还没有开发番石榴品种。因此,本研究提出利用微卫星标记对番石榴全近亲群体进行检测,以确定哪些基因型在未来的杂交中差异最大,从而选择更适应巴西北部土壤和气候条件的番石榴品种。根据农艺性状选择96个优良基因型,利用45个微卫星标记对其进行鉴定。估计了所分析基因型之间的遗传距离、聚类模式和群体遗传结构。通过邻域连接法进行层次聚类分析,发现它们形成了三个不同的类群。利用分子信息揭示了全同胞家族基因型之间存在适度的遗传变异。贝叶斯分析将基因型分为两组,因为个体共享了大多数分析的基因组区域。遗传差异最大的番石榴基因型,即分配给不同群体的基因型,如基因型5和基因型85,应推荐用于未来的杂交,以获得分离群体,从而使番石榴育种计划具有连续性。
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来源期刊
Bragantia
Bragantia AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
8.30%
发文量
33
审稿时长
4 weeks
期刊介绍: Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).
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