Genetic diversity of wheat–rye 1BL.1RS translocation lines derived from different wheat and rye sources

Abstract

Many studies have been conducted to determine the relative effects of the 1BL.1RS translocation on various traits in wheat. The effects of different wheat (Triticum aestivum L.) genetic backgrounds and rye (Secale cereale L.) sources have been addressed as major factors for inconsistent agronomic performance and end-use-quality traits of 1BL.1RS translocation wheats. However, all these studies were accomplished by using 1BL.1RS translocations with impure wheat genetic bases and narrow rye origins. The objective of this study was to test the genetic effects of centric fusion translocations by using primary 1BL.1RS lines derived from various pure wheat lines and rye sources. Twenty-one primary 1BL.1RS translocation lines were created from crosses between two pure wheat lines and three Chinese local rye varieties. These translocation lines and their wheat parents were then evaluated in southwestern China. The results provide direct evidence of the diverse effects of the different wheat parents and rye sources, taking part in 1BL.1RS translocations, on resistance to diseases, agronomic performance, and end-use quality traits. The highest amount of genetic diversity was observed in 1BL.1RS translocations derived from the same wheat lines and diverse rye varieties. The results suggest that the genetic diversity of 1BL.1RS translocation lines may originate from the different wheat genetic backgrounds, from different rye sources, from their interaction, and from the translocation itself. Creation of diverse 1BL.1RS translocations offers ample possibilities to introduce more variation into wheat for improved performance.

INLUENCE OF ALIEN GENETIC MATERIAL ON THE MANIFESTATION OF AGRONOMICALLY IMPORTANT TRAITS OF COMMON WHEAT (T. aestivum L.)

“…Помимо устойчивости к грибным патогенам, наличие хромосомы 1RS повышает адаптивность к условиям внешней среды, увеличивает биомассу и урожайность (Ehdaie et al, 2003;Kumlay et al, 2003;Kim et al, 2004;Ren et al, 2012). С использованием изогенных линий, содержащих сегменты 1RS хромосомы различной про тяженности, было показано, что генетические локусы, оказывающие положительный эффект на урожай, распо ложены в дистальном районе (Howell et al, 2014).…”

“…Согласно данным, полученным на изогенных линиях и коммерческих сортах, одни и те же чужеродные гены различаются по эффективности в разном генетическом окружении (Pretorius et al, 1990;Ren et al, 2012).…”

Cytogenetic and Embryologic Analyses of the Mechanism of Parthenogenesis Induced by 1BL/1RS Male Sterile Lines in Wheat

“…It has been reported that the short arm of chromosome 1B from common wheat (Triticum aestivum L.) is substituted by the short arm of chromosome 1R from rye (Secale cereale L.) in 'Salmon', thereby yielding 1BL/1RS translocation wheat. The transfer of the 1BL/1RS nucleus into the cytoplasm of different Aegilops species can result in male sterile wheat lines (Ren et al 2012;Zhou et al 2013). Thus, Zhang et al (1999) introduced the 1BL/1RS nucleus from wheat into the cytoplasm of different Aegilops species and successfully bred alloplasmic male sterile 1BL/1RS wheat lines with Ae.…”

1RS translocation in Croatian winter wheat varieties

“…It is considered that the presence of rye secalins, as well as the reduced number of gluten loci causes the negative impact of translocation on the technological quality of wheat (Moonen and Zeven, 1984, Dhaliwal and MacRitchie, 1990, Martin and Carrillo, 1999. However, research results on the Ren et al (2012) report that the main reasons for inconsistent effect of 1BL/1RS translocation are different genetic bases of wheat varieties and different sources of rye chromosome. Also, they claim that the genetic diversity of 1BL/1RS lines is the result of not only different genetic basis of wheat and different sources of rye chromosome, but also of their interactions and of the translocation itself.…”