Genomic affinity in hybrids of B-genome Arachis species: new genetic resources toward peanut improvement

IF 1.5 4区农林科学 Q2 Agricultural and Biological Sciences Crop Breeding and Applied Biotechnology Pub Date : 2021-01-01 DOI:10.1590/1984-70332021v21n3a48

Alejandra Vanina García, M. C. Silvestri, Melina A. Vandecaveye, A. R. Custodio, M. Moretzsohn, G. I. Lavia

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Abstract

: Peanut (Arachis hypogaea L.) is an important oilseed crop and food legume that is highly susceptible to biotic and abiotic factors. Wild Arachis spe - cies represent useful genetic resources because of their resistance to pests and diseases. In particular, understanding the affinity between B-genome species is important for broadening the genetic base of A. hypogaea (AABB genome), since only one population of A. ipaënsis is known, and relatively few other species have been described. Therefore, we aimed to determine the genomic affinity between A. ipaënsis and A. williamsii by developing hybrids. Microsatellite markers verified the hybrid status, and chromosome pairing and pollen viability results revealed that the species share high genomic affinity. Additionally, the presence of dyads detected in sporad and pollen analyses indicated the production of 2n gametes. These results will be useful for performing evolutionary studies and developing strategies for introgression programs to improve the B genome of A. hypogaea.

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b基因组花生杂交种的基因组亲和性:花生改良的新遗传资源

花生(arachhis hypogaea L.)是一种重要的油料作物和食用豆类，对生物和非生物因素非常敏感。野生花生具有抗病虫害的特性，是有用的遗传资源。特别是，了解b基因组物种之间的亲和力对于扩大A. hypogaea (AABB基因组)的遗传基础非常重要，因为只有一个已知的A. ipaënsis种群，而其他物种的描述相对较少。因此，我们旨在通过杂交确定A. ipaënsis和A. williamsii之间的基因组亲和性。微卫星标记证实了其杂交状态，染色体配对和花粉活力结果显示其具有较高的基因组亲和性。此外，在孢子和花粉分析中检测到的二分体表明产生了2n个配子。这些结果将有助于进行进化研究，并制定策略的渐渗计划，以提高南方野菜的B基因组。

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来源期刊

Crop Breeding and Applied Biotechnology 农林科学-农艺学

CiteScore

2.40

自引率

13.30%

发文量

审稿时长

6-12 weeks

期刊介绍： The CBAB – CROP BREEDING AND APPLIED BIOTECHNOLOGY (ISSN 1984-7033) – is the official quarterly journal of the Brazilian Society of Plant Breeding, abbreviated CROP BREED APPL BIOTECHNOL. It publishes original scientific articles, which contribute to the scientific and technological development of plant breeding and agriculture. Articles should be to do with basic and applied research on improvement of perennial and annual plants, within the fields of genetics, conservation of germplasm, biotechnology, genomics, cytogenetics, experimental statistics, seeds, food quality, biotic and abiotic stress, and correlated areas. The article must be unpublished. Simultaneous submitting to another periodical is ruled out. Authors are held solely responsible for the opinions and ideas expressed, which do not necessarily reflect the view of the Editorial board. However, the Editorial board reserves the right to suggest or ask for any modifications required. The journal adopts the Ithenticate software for identification of plagiarism. Complete or partial reproduction of articles is permitted, provided the source is cited. All content of the journal, except where identified, is licensed under a Creative Commons attribution-type BY. All articles are published free of charge. This is an open access journal.