The inheritance and chromosomal location of morphological traits in wild wheat, Triticum turgidum L. ssp. dicoccoides

Ahmadi, Hadi; Nazarian, Farhad

doi:10.1007/s10681-007-9434-2

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…1981; Cantrell and Joppa, 1991;Feldman et al, 1994;Xie and Nevo, 2008). Hence, wild emmer can be used as an important germplasm resource to breed new cultivars that improve yield and quality (Ahmadi and Nazarian, 2007). So far, only a few wild emmer genes have been introduced into cultivated wheat, and these are mostly related to disease resistance and quality (Huang et al, 2004a;Singrün et al, 2004;Tadesse et al, 2007;Xie and Nevo, 2008;Simmonds et al,.…”

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Characterization of Large Chromosome Segment Introgressions from Triticum turgidum subsp. dicoccoides into Bread Wheat with Simple Sequence Repeat Markers

et al. 2013

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1555ReseaRch D uring the Green Revolution of the 1960s, traditional multigenotypic landraces were replaced by a small number of monogenotypic modern cultivars, which resulted in a dramatic decrease in bread wheat genetic variation. This narrowed genetic basis renders cultivated wheat vulnerable to adverse environmental conditions and reduces the possibility of further wheat productivity and quality improvements. Therefore, it is necessary to broaden the genetic diversity of wheat germplasm. In the Triticeae, interspecific or intergeneric hybridization has long been used to enrich the gene pool and create the potential for new cultivars or new germplasm.Wild emmer (Triticum turgidum subsp. dicoccoides [TDIC]) (2n = 4x = 28; genomes BBAA) is the progenitor of durum and bread wheats and possesses many valuable genes that can be used to broaden the genetic pool of cultivated wheat and improve agronomically important traits, such as grain yield, grain protein, and tolerance to various stresses (Feldman, 1977; Feldman and Sears, ABSTRACT Libraries of large chromosome segment introgressions from wild relatives to crop species are valuable for assigning genes to specific chromosome segments and for interspecific transfers of useful genes. Using chromosome engineering, two sets of introgression lines (ILs) were created from chromosome segments of wild emmer [Triticum turgidum L. subsp. dicoccoides (Körn. ex Asch. & Graebn.) Thell. (TDIC)] in two cultivars of bread what (Triticum aestivum L.) by backcrosses to ditelocentrics. Segment identities were confirmed, and genetic lengths of segments and map positions of the translocation breakpoints were determined using 277 simple sequence repeat markers polymorphic between the recipients (bread wheat) and the wild donor (TDIC). The identities of all targeted chromosome arms in individual introgressions were confirmed. In addition, most lines also carried introgressed segments on nontargeted arms, most often the proximal parts of arms opposite to the targeted ones, which is consistent with the distribution of crossing over in wheat and are unavoidable when alien chromatin is introgressed by backcrosses to telocentrics. Using these ILs, some loci controlling important quantitative traits were located on specific TDIC chromosomes, such as loci with positive effects on thousand kernel weight (TKW) on chromosome arms 6AS, 4BS, 1BS, and 7A. These results indicate that these ILs might be a useful germplasm in allocating genes to chromosome arms and in wheat breeding.

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Characterization of Large Chromosome Segment Introgressions from Triticum turgidum subsp. dicoccoides into Bread Wheat with Simple Sequence Repeat Markers

et al. 2013

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“…Numerous studies have shown that TTD is a valuable gene pool having essential traits such as disease resistance, tolerance to abiotic adversities, high seed protein content, good quality, rich in amino acids, trace elements, and early maturity [31][32][33]. Therefore, TTD can be exploited as a valuable germplasm resource to improve wheat agronomic traits [34]. A set of chromosome arm substitution lines (CASLs) of wild emmer wheat on the background of the common wheat variety CS have been created in the laboratory of Dr. Feldman at the Weizmann Institute of Science in Israel [35].…”

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Genetic Mapping and Candidate Gene Prediction of a QTL Related to Early Heading on Wild Emmer Chromosome 7BS in the Genetic Background of Common Wheat

Chen

Zhao³

et al. 2022

Agronomy

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Heading date (HD) is an essential agronomic objective in wheat conventional breeding. Field experiments from several years and locations indicated that the chromosome arm substitution line (CASL) of wild emmer chromosome 7BS in the genetic background of common wheat var. Chinese Spring (CS) always showed a substantially earlier HD than CS planted in different seasons; usually about 8 d earlier than CS grown under a normal autumn sowing season. CASL7BS consistently showed a much earlier HD than CS when treated for vernalization under a long or short photoperiod and then grown under a short or long photoperiod in the growth room. CASL7BS showed faster spike development than CS at the stages before the glume stage when grown under long days, and depicted relatively rapid growth at all stages when grown under short days. To map the early gene in CASL7BS, F2 plants from the cross of CASL7BS and CS were planted in the field and growth room, forming two mapping populations (P1 and P2, respectively). According to the HD distribution of P1, the HD was most likely regulated by a dominant gene. A QTL was detected consistently in the distal region of about 8.94 cM flanked by C268 and C309 with LOD scores of 5–8, explaining 9.14 and 12.35% of the phenotypic variation in the two mapping populations. The QTL was further narrowed down to an interval between ZAFU058724 and ZAFU061354 of 58–61 Mb based on the HD and genotype of F3 and F4 families. A total of 41 genes were located in this region, and eleven of them were thought to be the candidate genes based on the gene functions. According to the HD and mapping location, the QTL identified in this study was a new gene associated with flowering, which will be helpful in understanding the mechanism of wheat flowering and for breeding an early wheat variety.

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Identification and mapping of a photoperiod response gene (QPpd.zafu-4A) on wild emmer wheat (Triticum turgidum L.) chromosome 4AL

Miao

Yang

et al. 2019

Euphytica

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The inheritance and chromosomal location of morphological traits in wild wheat, Triticum turgidum L. ssp. dicoccoides

Cited by 3 publications

References 14 publications

Characterization of Large Chromosome Segment Introgressions from Triticum turgidum subsp. dicoccoides into Bread Wheat with Simple Sequence Repeat Markers

Characterization of Large Chromosome Segment Introgressions from Triticum turgidum subsp. dicoccoides into Bread Wheat with Simple Sequence Repeat Markers

Genetic Mapping and Candidate Gene Prediction of a QTL Related to Early Heading on Wild Emmer Chromosome 7BS in the Genetic Background of Common Wheat

Identification and mapping of a photoperiod response gene (QPpd.zafu-4A) on wild emmer wheat (Triticum turgidum L.) chromosome 4AL

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