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Pukhalskiy, V. A.; Martynov, S. P.; Dobrotvorskaya, T. V.

doi:10.1023/a:1003915708448

Cited by 29 publications

(3 citation statements)

References 21 publications

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“…Hybrid necrosis, chlorosis and bushy plant formation is very common in “normal” wheat × wheat cross (Hermsen, 1963; Hermsen and Waninge, 1972; Pukhalskiy et al, 2000; Chu et al, 2006). The Ne1-Ne2 necrosis system is the best known hybrid necrosis system in wheat, which is caused when two complementary genes of Ne1 (5BL) and Ne2 (2BS) are found in the same plant (Tsunewaki, 1960; Nishikawa et al, 1974; Chu et al, 2006).…”

Section: Hybrid Necrosis/weakness Abnormalitymentioning

confidence: 99%

An Update of Recent Use of Aegilops Species in Wheat Breeding

Kishii

2019

Front. Plant Sci.

129

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Aegilops species have significantly contributed to wheat breeding despite the difficulties involved in the handling of wild species, such as crossability and incompatibility. A number of biotic resistance genes have been identified and incorporated into wheat varieties from Aegilops species, and this genus is also contributing toward improvement of complex traits such as yield and abiotic tolerance for drought and heat. The D genome diploid species of Aegilops tauschii has been utilized most often in wheat breeding programs. Other Aegilops species are more difficult to utilize in the breeding because of lower meiotic recombination frequencies; generally they can be utilized only after extensive and time-consuming procedures in the form of translocation/introgression lines. After the emergence of Ug99 stem rust and wheat blast threats, Aegilops species gathered more attention as a form of new resistance sources. This article aims to update recent progress on Aegilops species, as well as to cover new topics around their use in wheat breeding.

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Section: Hybrid Necrosis/weakness Abnormalitymentioning

confidence: 99%

An Update of Recent Use of Aegilops Species in Wheat Breeding

Kishii

2019

Front. Plant Sci.

129

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“…The latter observation is of particular interest. Earlier we showed that, in modern varieties of winter common wheat, the Ne1 gene is missing (Pukhalskiy et al 2000). This is due to two factors: (1) the prevalent involvement of the ne1Ne2 genotype in crosses, (2) natural selection against the Ne1 gene in selection varieties used in winter wheat breeding (Pukhalskiy et al 1998).…”

Section: Distribution Of Hybrid Necrosis Genes In Wheats Grown At Difmentioning

confidence: 98%

“…Chromosome localization was confirmed by molecular mapping of the hybrid necrosis genes (Chu et al 2006). World distribution of hybrid necrosis genes (Ne1 and Ne2) in wheat species and cultivars in different periods has been investigated (Tsunewaki and Nakai 1973;Zeven 1966Zeven , 1976Zeven , 1981Pukhalskiy 1975;Pukhalskiy et al 2000). However, the data are incomplete with respect to wheat genotypic diversity.…”

Section: Introductionmentioning

confidence: 99%

Hybrid necrosis genes in aboriginal wheats of Middle Asia in the light of the problem of the primary centers of biodiversity of the Triticum L. genus

2008

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The distribution of hybrid necrosis genes in aboriginal wheats of Middle Asia (Tadzhikistan, Kyrghyzstan, Uzbekistan, and Turkmenistan) was studied. Necrotic genotypes were identified in 154 samples including 147 samples of Triticum aestivum, six samples of T. compactum, and one T. antiquorum sample. The absence of the Ne2 gene in this region was shown. About 43.5% of the samples examined were of the Ne1ne2 genotype, while 56.5% of samples had the genotype ne1ne2. The frequency of the Ne1 gene in T. aestivum from Uzbekistan and Turkmenistan was higher than in Tadzhikistan and Kyrghyzstan (v 2 = 13.9; d.f. = 1). The height above sea level had no impact on Ne1 frequencies in cultivated wheats. No correlation between the frequencies of Ne1 and lg genes was revealed. It was suggested that the Middle Asia is a secondary route of wheat distribution from its primary center of origin.

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Origin of Plant Hybrid Incompatibility

Chen

2019

Encyclopedia of Life Sciences

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Hybrid incompatibility (HI) can cause inviability or sterility of inter‐ or intra‐species hybrids, which hinders gene flow between populations and thus contributes to speciation. HI clearly reduces fitness, but is extremely common across kingdoms. The classic Bateson–Dobzhansky–Muller model suggests that HI is caused by the genic conflicts between independently evolved loci. In this case, HI is simply a by‐product of evolution and has never been selected against. This model is supported by dozens of empirical studies and many incompatible HI‐causal genes have been cloned in recent decades. The HI‐causal genes are usually hyper‐polymorphic and evolve rapidly. Genetic drift, selection and the coevolution of plants with external microbes, or with internal selfish elements, may have driven the evolution of HI. These findings greatly broaden our understanding of the origin of HI. Key Concepts Hybrid incompatibility is caused by the deleterious interactions between incompatible genes that evolved independently. Hybrid incompatibility is a by‐product of evolution. Co‐evolution of plants and their external or internal factors, such as pathogens and genetic selfish elements, drives the evolution of hybrid incompatibilities in plants. The causal genes of hybrid incompatibilities is predictable. Hybrid incompatibility causal genes are rapidly evolved. Some hybrid incompatibility causal genes are selected. Gene duplication play important roles for the evolution of hybrid incompatibility.

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Cited by 29 publications

References 21 publications

An Update of Recent Use of Aegilops Species in Wheat Breeding

An Update of Recent Use of Aegilops Species in Wheat Breeding

Hybrid necrosis genes in aboriginal wheats of Middle Asia in the light of the problem of the primary centers of biodiversity of the Triticum L. genus

Origin of Plant Hybrid Incompatibility

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