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New source of alleles for resistance to black spot and phoma spot in papaya (Carica papaya L.)
Euphytica ( IF 1.6 ) Pub Date : 2021-06-01 , DOI: 10.1007/s10681-021-02863-3
Adriana Azevedo Vimercati Pirovani , Helaine Christine Cancela Ramos , Renato Santa-Catarina , Tathianne Pastana de Sousa Poltronieri , Julio Cesar Fiorio Vettorazzi , Pedro Henrique Araújo Diniz Santos , Josefa Grasiela Silva Santana , Rafaela Pereira Duarte , Marcelo Vivas , Messias Gonzaga Pereira

The papaya (Carica papaya L.) breeding program carried out by UENF has endeavored to develop resistant genotypes. A way to obtain such materials and broaden their genetic base is by incorporating resistance alleles extracted from dioecious genotypes into breeding programs. This study aimed to examine the morpho-agronomic attributes and aspects of resistance to black spot and phoma spot in a new hermaphrodite genotype (H-M3), which was identified in a resistant dioecious progeny (PD-M3). Twenty-one traits were evaluated in six genotypes in a randomized-block design with ten replicates and two plants per plot. Analysis of variance and means test were performed. Genetic parameters and divergence analysis were performed. The H-M3 genotype was near to ‘Calimosa’ and Maradol in the analyzed clusters, indicating good morpho-agronomic attributes and resistance. The proximity of H-M3 to the Maradol genotype is important since Maradol has already been reported as being resistant to black spot and exhibiting lower severity and incidence of phoma spot. Therefore, H-M3 emerges as a promising material for papaya breeding, as it encompasses favorable agronomic traits and moderate resistance.



中文翻译:

木瓜(Carica papaya L.)抗黑斑病等位基因的新来源

木瓜(Carica papayaL.) UENF 开展的育种计划致力于开发抗性基因型。获得此类材料并扩大其遗传基础的一种方法是将从雌雄异株的基因型中提取的抗性等位基因纳入育种计划。本研究旨在检查新雌雄同体基因型 (H-M3) 中的形态农艺属性和对黑斑病和黑斑病斑病的抗性方面,该基因型在抗性雌雄同体后代 (PD-M3) 中得到鉴定。在随机区组设计中对 6 个基因型中的 21 个性状进行了评估,每个小区有 10 个重复和两株植物。进行方差分析和均值检验。进行了遗传参数和差异分析。H-M3 基因型在分析的集群中接近 'Calimosa' 和 Maradol,表明良好的形态农学属性和抗性。H-M3 与 Maradol 基因型的接近性很重要,因为已经报道了 Maradol 对黑斑具有抗性,并且表现出较低的严重程度和发病率。因此,H-M3 具有良好的农艺性状和适度的抗性,成为木瓜育种的有前途的材料。

更新日期:2021-06-02
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