Integrative Pre-Breeding for Biotic Resistance in Forest Trees

Abstract

Climate change is unleashing novel biotic antagonistic interactions for forest trees that may jeopardize populations’ persistence. Therefore, this review article envisions highlighting major opportunities from ecological evolutionary genomics to assist the identification, conservation, and breeding of biotic resistance in forest tree species. Specifically, we first discuss how assessing the genomic architecture of biotic stress resistance enables us to recognize a more polygenic nature for a trait typically regarded Mendelian, an expectation from the Fisherian runaway pathogen–host concerted arms-race evolutionary model. Secondly, we outline innovative pipelines to capture and harness natural tree pre-adaptations to biotic stresses by merging tools from the ecology, phylo-geography, and omnigenetics fields within a predictive breeding platform. Promoting integrative ecological genomic studies promises a better understanding of antagonistic co-evolutionary interactions, as well as more efficient breeding utilization of resistant phenotypes.

Multi-Environment Yield Components in Advanced Common Bean (Phaseolus vulgaris L.) × Tepary Bean (P. acutifolius A. Gray) Interspecific Lines for Heat and Drought Tolerance

“…Looking back into the pedigree of the elite interspecific lines, key donors include the SER, SEF, HTA, GGR, and SMG genotypes (i.e., general combining ability due to the additive parental breeding values), as well as the progenies from the crosses among G 40119, G 40264, G 40036, DAA 9, SAR, SAB, SEF, RAB, SMR 180, ALB 74, INB 841, SMC 199, and DAB 295 (i.e., specific combining ability due to relative non-additive performance of particular crosses). Hence, genotypes resulting from the Alliance Bioversity-CIAT bean breeding program show potential as parental donors for interspecific crosses [33][34][35][36], or even as cultivars themselves, in the face of heat and drought stresses in coastal Colombia [37]. In this way, this works offers novel perspectives to harness, via advanced interspecific schemes, the highly contrasting diversity present at beans' germplasm, while bridging major bottlenecks to breed traits of interest in the face of climate change.…”

Identification and Validation of a QTL for Bacterial Leaf Streak Resistance in Rice (Oryza sativa L.) against Thai Xoc Strains

“…GS models help select cultivars with long-term quantitative resistance by accumulating beneficial alleles, as well as those with disease resistance under conditions that do not favor disease occurrence, which is necessary for phenotypic selection. Genomic selection has paved the way for genomic-assisted breeding (GAB), and could become a promising technique for accelerating the breeding cycle for crop improvement [55,56].…”

Inheritance of Yield Components and Morphological Traits in Avocado cv. Hass From “Criollo” “Elite Trees” via Half-Sib Seedling Rootstocks

“…Still, genetic-guided selection of “criollo” “plus trees” as donors of seedling rootstocks is also likely to impact other relevant traits both at the rootstock and scion levels. For instance, alterable rootstock phenotypes could include biotic resistance ( Clavijo and Holguiín, 2020 ; Ramírez-Gil et al, 2020a , Guevara-Escudero et al, 2021 ) to root rot P. cinnamomi ( Smith et al, 2011 ; Reeksting et al, 2016 ; Sánchez-González et al, 2019 ), drought and heat tolerance ( López-Hernández and Cortés, 2019 ), mineral nutrient uptake ( Bard and Wolstenholme, 1997 ; Calderón-Vázquez et al, 2013 ; Tamayo-Vélez and Osorio, 2018 ; Tamayo-Vélez et al, 2018 ), tolerance to salinity ( Bernstein et al, 2001 ; Mickelbart and Arpaia, 2002 ; Raga et al, 2014 ), genetic compatibility ( López-Guzmán et al, 2021 ), and harvest ( Ramírez-Gil et al, 2020b ) and postharvest physiochemical parameters ( Astudillo and Rodríguez, 2018 ). This extended panel of potential rootstock effects is key for the avocado industry because cv.…”