Breeding technology of alloplasmic wheat

Wu, Yansheng; Zhang, Cuilan; Shuxin, Ren; Zhang, Yan

doi:10.1007/bf02882881

Cited by 9 publications

(8 citation statements)

References 3 publications

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“…Some progress has been made on breeding new strains with salt tolerance and of good quality. ÔXiaoshan 2134Õ is a good example, where a widely-planted (in South China) spring wheat, ÔJin 2148Õ, has been significantly improved (Wu et al 1998a). Second, Ae.…”

Section: Discussionmentioning

confidence: 99%

“…With Ae. crassa as the cytoplasmic donor and cultivars or strains of common wheat, Triticum aestivum L., (ÔJin 2148Õ, ÔCA8057Õ, ÔJian 26Õ, ÔJian 31Õ, 9D-27-261, ÔFu 63Õ, ÔCA80224Õ and ÔSMH1694Õ) as the nuclear donors, eight alloplasmic common wheats were produced by distant crossing followed by substitution backcrossing (Liu et al 1997, Wu et al 1998a). In 1991, (Ae.…”

Section: Methodsmentioning

confidence: 99%

“…The alloplasmic lines with Ae. crassa cytoplasm were all fertile in Beijing and other provinces (Liu et al 1997, Wu et al 1998a, and a few useful genetic effects of cytoplasm were found. The fertility differences of the alloplasmic lines with Ae.…”

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confidence: 99%

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Value and utilization of alloplasmic common wheats with Aegilops crassa cytoplasm

Liu

Hou

et al. 2002

Plant Breeding

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Differences between alloplasmic lines and euplasmic controls indicated consistent beneficial effects of Aegilops crassa cytoplasm on common wheats. In general, the agronomic performance of alloplasmic lines was superior to that of euplasmic controls; the significant differences observed were ascribed to nucleus‐cytoplasmic (NC) interactions. A number of useful genetic attributes, for example, high yield, good quality and salt tolerance, were identified. A new NC hybrid variety ‘Xiaoshan 2134’ was bred. Field trials showed that the yield NC heterosis of ‘Xiaoshan 2134’ was 13.9% and the yield of ‘Xiaoshan 2134’ was at least 20% higher than that of a control variety widely grown in North China. The results suggested that Ae. crassa cytoplasm could broaden the genetic base of common wheat and improve common wheat cultivars by utilizing NC heterosis.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Value and utilization of alloplasmic common wheats with Aegilops crassa cytoplasm

Liu

Hou

et al. 2002

Plant Breeding

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“…mutica or the Ae. crassa cytoplasms, showed higher yield, increased tolerance to abiotic stresses, and improved seed quality [32–34]. In this study, the mitochondrial genomes of three Triticum-Aegilops species were sequenced and described; durum alloplasmic line (lo) durum with the Ae.…”

Section: Introductionmentioning

confidence: 99%

Accelerated evolution of the mitochondrial genome in an alloplasmic line of durum wheat

et al. 2014

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BackgroundWheat is an excellent plant species for nuclear mitochondrial interaction studies due to availability of large collection of alloplasmic lines. These lines exhibit different vegetative and physiological properties than their parents. To investigate the level of sequence changes introduced into the mitochondrial genome under the alloplasmic condition, three mitochondrial genomes of the Triticum-Aegilops species were sequenced: 1) durum alloplasmic line with the Ae. longissima cytoplasm that carries the T. turgidum nucleus designated as (lo) durum, 2) the cytoplasmic donor line, and 3) the nuclear donor line.ResultsThe mitochondrial genome of the T. turgidum was 451,678 bp in length with high structural and nucleotide identity to the previously characterized T. aestivum genome. The assembled mitochondrial genome of the (lo) durum and the Ae. longissima were 431,959 bp and 399,005 bp in size, respectively. The high sequence coverage for all three genomes allowed analysis of heteroplasmy within each genome. The mitochondrial genome structure in the alloplasmic line was genetically distant from both maternal and paternal genomes. The alloplasmic durum and the Ae. longissima carry the same versions of atp6, nad6, rps19-p, cob and cox2 exon 2 which are different from the T. turgidum parent. Evidence of paternal leakage was also observed by analyzing nad9 and orf359 among all three lines. Nucleotide search identified a number of open reading frames, of which 27 were specific to the (lo) durum line.ConclusionsSeveral heteroplasmic regions were observed within genes and intergenic regions of the mitochondrial genomes of all three lines. The number of rearrangements and nucleotide changes in the mitochondrial genome of the alloplasmic line that have occurred in less than half a century was significant considering the high sequence conservation between the T. turgidum and the T. aestivum that diverged from each other 10,000 years ago. We showed that the changes in genes were not limited to paternal leakage but were sufficiently significant to suggest that other mechanisms, such as recombination and mutation, were responsible. The newly formed ORFs, differences in gene sequences and copy numbers, heteroplasmy, and substoichiometric changes show the potential of the alloplasmic condition to accelerate evolution towards forming new mitochondrial genomes.Electronic supplementary materialThe online version of this article (doi:10.1186/1471-2164-15-67) contains supplementary material, which is available to authorized users.

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“…The research programme into distant hybridization between common wheat and Aegilops , and the development of a new‐type CMS line of common wheat began in 1978 (Wu et al. 1998).…”

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A YA‐type cytoplasmic male‐sterile source in common wheat

et al. 2006

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A new cytoplasmic male-sterile (CMS) system for hybrid wheat breeding, YA-type CMS line with the cytoplasmic mutant from the common wheat variety ÔCA8057Õ, was developed by the Institute of Genetics and Developmental Biology, Chinese Academy of Sciences. The pollen sterility of YA-type CMS line was easily maintained but difficult to restore. Some sterile lines with desirable agronomic performance, such as msYA-ÔCA8057Õ (BC 17 ), msYA-ÔYuandong 6Õ (BC 9 ), msYA-ÔJin 411Õ (BC 9 ), msYA-ÔWL1Õ (BC 10 ), msYA-ÔYanshi 9Õ (BC 10 ), msYA-ÔBPm16Õ (BC 9 ), msYA-ÔJindong 8Õ (BC 9 ) and msYAÔJinmai 33Õ (BC 9 ), were bred and a restorer line GR1 was screened with 26 new restorer lines being developed by transferring restorer genes from GR1. It was found that abnormal phenomena occurred at the uninucleate-pollen stage and the abortive pollen was poor in starch content and other components. The variance analysis of agronomic traits in eight sterile lines indicated that there was no general negative effect of cytoplasm. The genetic analysis for fertility restoration showed that two pairs of independent major genes (designated YARf 1 YARf 1 YArf 2 YArf 2 ) and some minor genes could be involved in the fertility restoration in restorer line GR1, and YARf 1 was epistatic over YARf 2 for the genetic effect of fertility restoration. As a new CMS system, the YA-type CMS line was of potential value for hybrid wheat breeding and should be further studied.

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Breeding technology of alloplasmic wheat

Cited by 9 publications

References 3 publications

Value and utilization of alloplasmic common wheats with Aegilops crassa cytoplasm

Value and utilization of alloplasmic common wheats with Aegilops crassa cytoplasm

Accelerated evolution of the mitochondrial genome in an alloplasmic line of durum wheat

A YA‐type cytoplasmic male‐sterile source in common wheat

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