Using Avena Macrostachya for Improvement of Oat Winterhardiness in Poland

Lapinski, B.; Rachwalska, A.

doi:10.30901/2227-8834-2017-1-58-67

Cited by 2 publications

(3 citation statements)

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“…Interspecific hybridization is widely used in crop breeding since it expands the species variability that is necessary for emergence of new polyploid hybrids with improved characteristics compared to their parental species [59,60]. In Avena breeding programs, for example, the interspecific crosses with wild relatives, such as winter-hardy A. macrostachya, were used to produce new coldresistant allopolyploid hybrid cultivars [36,[38][39][40]. A comparative study of genomes of artificial and natural allopolyploids contributes to understanding the pattern of formation of a new hybrid genome after the 'genomic shock'.…”

Section: Discussionmentioning

confidence: 99%

“…It is also the only perennial cross-pollinating Avena species which occupies an isolated position within the genus based on the analysis of phenotypic, developmental, and reproductive characters [23]. A. macrostachya possesses important resistance genes desirable to be transferred to cultivated species (e.g., A. sativa), which include extreme winter hardiness and resistance to some diseases and pests (powdery mildew, crown and stem rust, barley yellow dwarf mosaic virus, soil-borne mosaic virus, and the aphid Rhopalosiphum padi) [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

“…To create novel material for oat introgression breeding and develop new winter-hardy oat varieties resistant to biotic stresses, a series of experiments on crossing A. macrostachya with various Avena species was conducted. Particularly, it was shown that A. sativa × A. macrostachya octoploids and decaploids were effective sources of winter hardiness for hexaploid oats [36][37][38][39]. The analyses of chromosome pairing together with the results of crossings revealed the high degree of allosyndesis in which C-genome-bearing species were combined with A. macrostachya, and it was assumed that the C genome was closer to A. macrostachya than the A genome [40].…”

Section: Introductionmentioning

confidence: 99%

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Genome Variability in Artificial Allopolyploid Hybrids of Avena sativa L. and Avena macrostachya Balansa ex Coss. et Durieu Based on Marker Sequences of Satellite DNA and the ITS1–5.8S rDNA Region

Amosova,

Gnutikov,

Rodionov

et al. 2024

IJMS

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Artificial hybrids between cultivated Avena species and wild Avena macrostachya that possess genes for resistance to biotic and abiotic stresses can be important for oat breeding. For the first time, a comprehensive study of genomes of artificial fertile hybrids Avena sativa × Avena macrostachya and their parental species was carried out based on the chromosome FISH mapping of satellite DNA sequences (satDNAs) and also analysis of intragenomic polymorphism in the 18S–ITS1–5.8S rDNA region, using NGS data. Chromosome distribution patterns of marker satDNAs allowed us to identify all chromosomes in the studied karyotypes, determine their subgenomic affiliation, and detect several chromosome rearrangements. Based on the obtained cytogenomic data, we revealed differences between two A. macrostachya subgenomes and demonstrated that only one of them was inherited in the studied octoploid hybrids. Ribotype analyses showed that the second major ribotype of A. macrostachya was species-specific and was not represented in rDNA pools of the octoploids, which could be related to the allopolyploid origin of this species. Our results indicate that the use of marker satDNAs in cytogenomic studies can provide important data on genomic relationships within Avena allopolyploid species and hybrids, and also expand the potential for interspecific crosses for breeding.

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