Genetics of Hybrid Necrosis in Rye

Ren, Z. L.; Lelley, T.

doi:10.1111/j.1439-0523.1988.tb00237.x

Cited by 14 publications

(5 citation statements)

References 9 publications

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“…Two genes for hybrid necrosis were found in inbred rye lines. They were complementary to each other and to corresponding genes for hybrid necrosis in wheat [9]. As early as in 1937, Dobzhansky suggested existence of comple-mentary genes, determining lethality or sterility in distant hybrids [10].…”

Section: Discussionmentioning

confidence: 99%

Genetic Control of Embryo Lethality in Crosses between Common Wheat and Rye

2005

Russ J Genet

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The phenotypic manifestation and genetic control of embryo lethality observed in crosses between common wheat and rye were studied. It was found that crosses between common wheat and inbred self-fertile rye lines L2 and 535 gave rise to ungerminating grains, in which the development and differentiation of the hybrid embryo are arrested. Study of the degree of embryo development in the hybrid grains obtained by crossing common wheat varieties with inbred rye lines L2 and 535 showed that genotypes of the parents affected the ratio between undifferentiated embryos of various sizes. Analysis of this trait was performed by test crosses according to a novel pedigree program with the use of interlinear hybrids and a set of fourth-generation hybrid recombinant inbred lines. Rye line L2 was shown to bear the Eml (Embryo lethality) gene, which terminates the development of the hybrid embryo in amphihaploids. The suggestion of complementary interaction between wheat and rye genes during formation of a "new" character in wheat-rye F 1 hybrids is discussed. A method of detecting an allele not complementary to the rye Eml allele in wheat is proposed. The proposed test program allows appropriate study of the system of wheat and rye genes involved in complementary interaction in the genotype of a distant hybrid. PLANT GENETICS

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Section: Discussionmentioning

confidence: 99%

Genetic Control of Embryo Lethality in Crosses between Common Wheat and Rye

2005

Russ J Genet

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“…These include the hybrid necrosis genes Ne1, Ne2 (Tsunewaki 1960, Hermsen 1963, two types of hybrid chlorosis (Ch1, Ch2; Hermsen 1966 and Cs1, Cs2;Kawahara 1993), and hybrid dwarfness (D1, D2, D3, D4;McMillan 1937, Hermsen 1967, Worland and Law 1980. The expression of chlorosis in certain wheat x rye hybrids led Tomar and Singh (1998) to propose the existence of the gene Clr1 in rye, while the two dominant complementary hybrid necrosis rye genes Ner1 and Ner2 are well established (Scoles 1985, Ren andLelley 1988). The dominant alleles of these two genes complement each other within the species, as well as in species hybrids.…”

Section: Discussionmentioning

confidence: 96%

“…Besides embryo lethality, hybrid dwarfness, hybrid weakness, necrosis/chlorosis, morphological abnormalities, and sterility are some of the consequences (e.g. Ren and Lelley 1988, 1989, Tomar and Singh 1998.…”

Section: Introductionmentioning

confidence: 99%

Gene mutations in rye causing embryo lethality in hybrids with wheat: allelism and chromosomal localisation

Tikhenko¹,

Tsvetkova²,

Priyatkina³

et al. 2011

Biologia plant.

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In crosses between hexaploid wheat and inbred lines of rye, a small number of rye genotypes produce seeds carrying undifferentiated, non-viable embryos. Hybrids between such lines and those not showing this phenotype were used as pollen donors in crosses with bread wheat in order to determine the genetic basis of disturbed embryo development. A single gene, designated Eml-R1b, is causing this character. Molecular markers associated with F 2 genotypes derived from a contrasting rye inbred progeny were used for a linkage study. Recombinant inbred lines of an F 5 population served as testers. Eml-R1b maps to chromosome arm 6RL, along with two co-segregating microsatellite loci, Xgwm1103 and Xgwm732. Complementary interactions of deleterious genes in wheat and rye are discussed.

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“…Hybrid necrosis genes, including Ne1 and Ne2 in bread wheat, Net1 and Net2 in synthetic hexaploid wheat, and Ner1 and Ner2 in rye, have been mapped in cereal crops. Ne1 , Ne2 and Net2 are located on chromosome arms 5BL, 2BS and 2DS, respectively (Chu et al 2006 ; Mizuno et al 2011 ; Ren and Lelley 1988 ). Previous studies have shown that Ne1 is expressed mainly in tetraploid wheat (Tsunewaki 1992 ; Vikas et al 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Phenotypic characterization and gene mapping of hybrid necrosis in Triticum durum–Haynaldia villosa amphiploids

Liu,

Huang

et al. 2024

Theor Appl Genet

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Key message Phenotypical, physiological and genetic characterization was carried out on the hybrid necrosis gene from Haynaldia villosa, and the related gene Ne-V was mapped to chromosome arm 2VL. Abstract Introducing genetic variation from wild relatives into common wheat through wide crosses is a vital strategy for enriching genetic diversity and promoting wheat breeding. However, hybrid necrosis, a genetic autoimmunity syndrome, often occurs in the offspring of interspecific or intraspecific crosses, restricting both the selection of hybrid parents and the pyramiding of beneficial genes. To utilize the germplasms of Haynaldia villosa (2n = 2x = 14, VV), we conducted wide hybridization between durum wheat (2n = 4x = 28, AABB) and multiple H. villosa accessions to synthesize the amphiploids (2n = 6x = 42, AABBVV). This study revealed that 61.5% of amphiploids derived from the above crosses exhibited hybrid necrosis, with some amphiploids even dying before reaching maturity. However, the initiation time and severity of necrosis varied dramatically among the progenies, suggesting that there were multiple genetic loci or multiple alleles in the same genetic locus conferring to hybrid necrosis in H. villosa accessions. Genetic analysis was performed on the F2 and derived F2:3 populations, which were constructed between amphiploid STH59-1 with normal leaves and amphiploid STH59-2 with necrotic leaves. A semidominant hybrid necrosis-related gene, Ne-V, was mapped to an 11.8-cM genetic interval on the long arm of chromosome 2V, representing a novel genetic locus identified in Triticum-related species. In addition, the hybrid necrosis was correlated with enhanced H2O2 accumulation and cell death, and it was influenced by the temperature and light. Our findings provide a foundation for cloning the Ne-V gene and exploring its molecular mechanism.

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Genetics of Hybrid Necrosis in Rye

Cited by 14 publications

References 9 publications

Genetic Control of Embryo Lethality in Crosses between Common Wheat and Rye

Genetic Control of Embryo Lethality in Crosses between Common Wheat and Rye

Gene mutations in rye causing embryo lethality in hybrids with wheat: allelism and chromosomal localisation

Phenotypic characterization and gene mapping of hybrid necrosis in Triticum durum–Haynaldia villosa amphiploids

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