Study and improvement of maize maternal haploid inducers

Trentin, Henrique Uliana

doi:10.31274/etd-20210114-150

Cited by 1 publication

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References 128 publications

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“…During wide crosses, the chromosomes of the distantly related species are eliminated during early embryogenesis, leaving a haploid embryo (Ishii et al, 2016). Also, during intra-specific crosses, a selected maize parent can be crossed using pollen grains from a distant parent following pollen treatment with chemical or physical mutagenic agents followed by embryo rescue (Trentin, 2019). Striga resistance breeding has been attempted through maize-sorghum hybridization.…”

Section: Doubled Haploid Techniquementioning

confidence: 99%

Genetic resources and breeding of maize for Striga resistance: a review

et al. 2023

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The potential yield of maize (Zea mays L.) and other major crops is curtailed by several biotic, abiotic, and socio-economic constraints. Parasitic weeds, Striga spp., are major constraints to cereal and legume crop production in sub-Saharan Africa (SSA). Yield losses reaching 100% are reported in maize under severe Striga infestation. Breeding for Striga resistance has been shown to be the most economical, feasible, and sustainable approach for resource-poor farmers and for being environmentally friendly. Knowledge of the genetic and genomic resources and components of Striga resistance is vital to guide genetic analysis and precision breeding of maize varieties with desirable product profiles under Striga infestation. This review aims to present the genetic and genomic resources, research progress, and opportunities in the genetic analysis of Striga resistance and yield components in maize for breeding. The paper outlines the vital genetic resources of maize for Striga resistance, including landraces, wild relatives, mutants, and synthetic varieties, followed by breeding technologies and genomic resources. Integrating conventional breeding, mutation breeding, and genomic-assisted breeding [i.e., marker-assisted selection, quantitative trait loci (QTL) analysis, next-generation sequencing, and genome editing] will enhance genetic gains in Striga resistance breeding programs. This review may guide new variety designs for Striga-resistance and desirable product profiles in maize.

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Section: Doubled Haploid Techniquementioning

confidence: 99%