Download Alien Introgression in Wheat: Cytogenetics, Molecular by Marta Molnar-Lang, Carla Ceoloni, Jaroslav Dolezel PDF

By Marta Molnar-Lang, Carla Ceoloni, Jaroslav Dolezel

This e-book presents an summary of the newest developments within the box of alien introgression in wheat. the invention and broad program of molecular genetic options together with molecular markers, in situ hybridization, and genomics has ended in a surge in interspecific and intergeneric hybridization in fresh a long time. The paintings starts off with the taxonomy of cereals, in particular of these species that are strength gene resources for wheat development. The textual content then is going directly to hide the starting place of wheat, breeding in reference to alien introgressions, and the issues of manufacturing intergeneric hybrids and backcross derivatives. those difficulties can contain crossability, sterility, and unequal chromosome transmission. The paintings then covers alien introgressions in accordance with the similar species used, in addition to new leads to the sector of genomics of untamed wheat family and introgressions.

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Additional resources for Alien Introgression in Wheat: Cytogenetics, Molecular Biology, and Genomics

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2014; Gornicki et al. 2014). Results of molecular analyses have shown that genomes S, A, and D are much more closely related to each other than to other genomes (Monte et al. 1993; Dvorak and Zhang 1990; Dvorak et al. 1998). Marcussen et al. (2014) proposed that a homoploid ancient hybridization event occurred long before the divergence of the diploid species of Aegilops and indicated that the use “D-genome lineage” in their publication is nonsynonymous with the D genome of Ae. tauschii but rather, refers to the entire D + S + M clade.

Matsuoka et al. (2013) studied the genetic mechanism that causes spontaneous genome doubling in the F1 2 Origin and Evolution of Wheat and Related Triticeae Species 41 hybrid between T. turgidum, and Ae. tauschii. They identified six QTLs in Ae. tauschii that are involved in hybrid genome doubling regulating nonreductional meiosis and its subsequent unreduced gamete production processes. Therefore, one might assume that there is a high potential for the frequent and recurrent formation of allopolyploids in the wheat group.

Sharonensis (Steuenagel et al. 2014a, b). Consequently, they concluded that the Sitopsis classification is inconsistent with their genome-wide analysis of Ae. sharonensis, provoking the need to reconstruct the current taxonomy of Aegilops. How the diploid species of this group evolved? Speciation at the diploid level might result from accumulation of mutations in coding and in noncoding sequences as well as structural changes that lead to the buildup of genetic barriers between the diverging taxa.

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