CMS System in Hexaploid Triticale

Warzecha, R.; Salak-Warzecha, K.; Staszewski, Z.

doi:10.1007/978-94-009-0329-6_29

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Efficient hybrid seed production requires three key components: (a) a CMS line lacking functional nuclear‐encoded restorer‐of‐fertility (Rf) genes; (b) a maintainer line, an analog to the CMS line but having normal cytoplasm (noninducing male sterility); and (c) a restorer line carrying dominant restorer alleles of Rf gene(s) that acts as the male parent to cross with the CMS line to produce the F 1 hybrid seeds (Chen & Liu, 2014). Low frequency of maintainers, unstable male sterility in different environments, and incomplete fertility restoration are the system's weaknesses that require attention (Góral, 2002; Góral et al., 2015; Warzecha et al., 1996). Detection of the environmentally stable quantitative trait loci (QTLs) controlling the trait may support the triticale breeding process by identifying markers suitable for marker‐assisted selection and, therefore, the genotypes of interest.…”

Section: Introductionmentioning

confidence: 99%

The 4R QTLs pollen fertility restoration in triticale with CMS Triticum timopheevii

et al. 2022

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The Triticum timopheevii Zhuk. (Tt) cytoplasm is the most exploited cytoplasmic male sterility (CMS) type used in triticale in commercial seed production of hybrid varieties. The present study established a recombinant inbred line (RIL) mapping population to identify genetic loci controlling fertility restoration in triticale with CMS Tt. The trait was evaluated via phenotyping the BC 1 F 1 materials originating from a backcross of maternal line MS 112(15)-2-1 (on CMS Tt) and RILs. A genetic map spanning 2293 cM over 21 linkage groups was constructed using 1,170 single nucleotide polymorphisms and silico diversity array technology (DArT) markers generated through DArTseq genotyping. Two quantitative trait loci (QTL) controlling fertility restoration were localized at the 4RL chromosome. They were stable during two vegetative seasons and, depending on the year, explained 17.8 to 37.5 (QRft-4R.1) and 17.8 to 27.1% (QRft-4R.2) of phenotypic variance. Bioinformatic analysis was performed to predict genes potentially responsible for the trait. Four markers linked to the trait were successfully converted into a polymerase chain reaction-based assay to select the pollen fertility QTLs easily. The exact position of QTLs detected previously in the rye and here in the triticale suggests that the same loci might control the trait.

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Section: Introductionmentioning

confidence: 99%

The 4R QTLs pollen fertility restoration in triticale with CMS Triticum timopheevii

et al. 2022

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The Development of Hybrid Triticale

et al. 2015

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Usefulness of alien sterilizing cytoplasms for the hybrid breeding of triticale (xTriticosecale Wittmack): preliminary results

Simlat,

Warzecha,

Stojałowski

et al. 2024

J Appl Genetics

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To be useful for cereal breeding, cytoplasmic male sterility (CMS) should express the complete sterility of maternal lines and the full restoration of the male fertility of F1 hybrids. The most reliable source of sterilizing cytoplasm for triticale is Triticum timopheevi; however, due to the low frequency of efficient non-restorer genotypes for this cytoplasm, new sources of CMS are needed. In this study, aside from T. timopheevi (T) cytoplasm, three alternative CMS sources were tested: Pampa (P) from Secale cereale L., Aegilops sharonensis (A), and Ae. ventricosa (V). The suitability of these cytoplasms for breeding was assessed based on the male fertility/sterility of F1 hybrids obtained through the manual pollination of CMS maternal lines with 36 triticale cultivars and breeding strains. About half of the hybrids with each type of cytoplasm were fully fertile and produced more than 30 grains per bagged spike. The highest percentage was found in hybrids with P cytoplasm (58.33%) and the lowest in hybrids with A cytoplasm (44.44%). Male sterility was observed in hybrids with P cytoplasm (16.67%) and A cytoplasm (16.67%) but not in hybrids with T or V cytoplasm. In terms of practical aspects, male sterility systems with P or A cytoplasm exhibit similarity in their ability to restore male fertility that differ from the T and V cytoplasms. Although all studied cytoplasms exhibited some disadvantages for breeding purposes, none should be definitively classified as unacceptable for future breeding programs regarding the development of triticale hybrid cultivars.

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CMS System in Hexaploid Triticale

Cited by 3 publications

References 3 publications

The 4R QTLs pollen fertility restoration in triticale with CMS Triticum timopheevii

The 4R QTLs pollen fertility restoration in triticale with CMS Triticum timopheevii

The Development of Hybrid Triticale

Usefulness of alien sterilizing cytoplasms for the hybrid breeding of triticale (xTriticosecale Wittmack): preliminary results

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