Cytological Studies in the Genus Nicotiana

Christoff, M.

doi:10.1093/genetics/13.3.233

Cited by 41 publications

(1 citation statement)

References 5 publications

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“…Hybrid lethality in seedlings has been reported for over 100 years in many plant species, such as Triticum - Aegilops complex ( Sax, 1921 ), Nicotiana ( Malloch and Malloch, 1924 ; Christoff, 1928 ; Kostoff, 1930 ), Crepis ( Hollingshead, 1930 ), Gossypium ( Gerstel, 1954 ), Oryza ( Oka, 1957 ), Solanum ( Day, 1958 ; Sawant, 1958 ), Cucurbita ( Whitaker and Bemis, 1964 ), Capsicum ( Hirose et al., 1960 ; Pickersgill, 1971 ), Papaver ( Mcnaughton and Harper, 1960 ), Hordeum ( Takahashi et al., 1970 ), Phaseolus ( Shii et al., 1980 ; Gepts and Bliss, 1985 ), and Camellia ( Nadamitsu et al., 1986 ). Several terms representing hybrid lethality or developmental defects of hybrid seedlings are used by researchers.…”

Section: Hybrid Seedling Lethalitymentioning

confidence: 99%

Understanding and overcoming hybrid lethality in seed and seedling stages as barriers to hybridization and gene flow

Shiragaki

Tezuka³

2023

Front. Plant Sci.

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Hybrid lethality is a type of reproductive isolation barrier observed in two developmental stages, hybrid embryos (hybrid seeds) and hybrid seedlings. Hybrid lethality has been reported in many plant species and limits distant hybridization breeding including interspecific and intergeneric hybridization, which increases genetic diversity and contributes to produce new germplasm for agricultural purposes. Recent studies have provided molecular and genetic evidence suggesting that underlying causes of hybrid lethality involve epistatic interaction of one or more loci, as hypothesized by the Bateson–Dobzhansky–Muller model, and effective ploidy or endosperm balance number. In this review, we focus on the similarities and differences between hybrid seed lethality and hybrid seedling lethality, as well as methods of recovering seed/seedling activity to circumvent hybrid lethality. Current knowledge summarized in our article will provides new insights into the mechanisms of hybrid lethality and effective methods for circumventing hybrid lethality.

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