Molecular and Phenotypic Characterization of Advanced Backcross Lines Derived from Interspecific Hybridization of Durum Wheat

Todorovska, Elena; Hadjiivanova, Boryana; Bozhanova, Violeta; Dechev, D.; Muhovski, Yordan; Panchev, I.; Peycheva, Valentina; Ivanova, A.

doi:10.5504/bbeq.2013.0030

Cited by 4 publications

(1 citation statement)

References 75 publications

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“…Threshability was also improved, and up to 30% of the grains in backcross generations were free‐threshing because of the residual effects of the durum genome. The free‐threshing trait is transmittable from durum to emmer through proper selection and adapting breeding programs (Todorovska et al., 2013).…”

Section: Discussionmentioning

confidence: 99%

Concurrent improvement of durum and emmer wheat through reciprocal backcrossing and hybridization

et al. 2022

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Emmer wheat has not been improved but is a valuable gene source for improving durum (Triticum turgidum ssp. durum). Conversely, durum is less looked upon for emmer (T. turgidum ssp. dicoccum) improvement. This study examined the possibility of concurrently improving the two species by crossing eight durum cultivars with four emmer local varieties in a half-diallel fashion in two consecutive years. Also, emmer and two durum genotypes were reciprocally backcrossed, and their BC 1 F 1 progeny were field-evaluated during the wheat cropping season (November-June) at the Isfahan University of Technology research farm (32˚32′ N, 51˚23′ E). The results showed that durum wheat had a considerable effect on the grain yield (GY), kernel diameter, 1,000-kernel weight (TKW), and test weight of F 1 hybrids, whereas emmer contributed more to increasing the grain protein content (GPC), kernel length, and plant height (PH). A similar pattern was observed for BC 1 F 1 hybrids from the two recurrent durum parents. The GPC was reduced with recurrent durum parents in the backcrosses compared with emmer, but was still higher than in both durum parents. In the backcrosses with the recurrent emmer parent, GY and TKW were higher than those of emmer but only slightly lower than those of the durum parents. The PH was strongly influenced by emmer in all crosses, though the lodging was significantly reduced compared with emmer, possibly through obtaining stronger stems from durum. These findings suggest the possibility of combining desirable genes from the two species and their concurrent improvement in a single breeding program.

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Section: Discussionmentioning

confidence: 99%

Concurrent improvement of durum and emmer wheat through reciprocal backcrossing and hybridization

et al. 2022

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Revealing the genetic diversity of teosinte introgressed maize population by morphometric traits and microsatellite markers

Adhikari

Joshi

Kumar

et al. 2021

J. Plant Biochem. Biotechnol.

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Principal component analysis of morpho-floral traits in Oryza sativa × Oryza longistaminata advanced backcross lines of rice

Choudhary,

P Singh,

Singh

et al. 2024

J Exp Bio & Ag Sci

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Hybrid rice technology substantially improves the food security of South Asian countries where rice (Oryza sativa L.) is a staple food. Several traits contribute to hybrid seed production efficiency, among which stigma exsertion is crucial for enhancing production by facilitating out-crossing pollination. This study evaluated the variation patterns and relative impact of 12 morpho-floral traits on overall variability in advanced backcross lines derived from crosses CRMS 32B cv. Oryza sativa and Oryza longistaminata. For this study, 290 BC4F2 lines were grown during Kharif 2019 in 3 replications using a randomized complete block design (RCBD). Principle component analysis (PCA) was performed on all traits, and the findings revealed 11 principal components (PCs). Out of 11 PCs, the first five displayed eigenvalues exceeding 1, collectively explaining 78.78% of the total variability. PC1, PC2, PC3, PC4, and PC5 contributed 26.36%, 19.94%, 14.22%, 9.81%, and 8.44% of the variation, with eigenvalues of 3.16, 2.39, 1.71, 1.18 and 1.01, respectively. PC1 was predominantly associated with yield-related traits such as panicle length, plant height, grain yield per plant, grains per panicle, and effective tillers per plant. On the other hand, PC2 was mainly associated with outcrossing-related floral traits such as total stigma exsertion percentage, dual stigma exsertion percentage, and single stigma exsertion percentage. However, PC3 and PC4 were associated with both floral and yield-related traits, i.e., days to 50% flowering (DF), days to maturity (DM), plant height (PH), effective tillers per plant (ETPP), spikelet fertility percentage (SFP), grain yield per plant (GYPP) and grains per panicle (GPP). Therefore, PC1, PC2, PC3, and PC4 were major contributors to rice hybrid seed production.

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Molecular and Phenotypic Characterization of Advanced Backcross Lines Derived from Interspecific Hybridization of Durum Wheat

Cited by 4 publications

References 75 publications

Concurrent improvement of durum and emmer wheat through reciprocal backcrossing and hybridization

Concurrent improvement of durum and emmer wheat through reciprocal backcrossing and hybridization

Revealing the genetic diversity of teosinte introgressed maize population by morphometric traits and microsatellite markers

Principal component analysis of morpho-floral traits in Oryza sativa × Oryza longistaminata advanced backcross lines of rice

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