Development of introgression lines of AA genome <i>Oryza</i> species, <i>O. glaberrima</i>, <i>O. rufipogon</i>, and <i>O. nivara</i>, in the genetic background of <i>O. sativa</i> L. cv. Taichung 65

Abstract

Development of introgression lines of AA genome Oryza species, O. glaberrima, O. rufipogon, and O. nivara, in the genetic background of O. sativa L. cv. Taichung 65

Exploring the Loci Responsible for Awn Development in Rice through Comparative Analysis of All AA Genome Species

“…We developed and firstly reported RRESL in this study. Other CSSLs are previously reported; WK1962-IL [ 32 ], WK56-IL [ 32 ], GLU-IL [ 33 ], MER-IL [ 34 ], MER-IL[MER] [ 34 ], KKSL [ 24 ], NSL [ 35 ], RSL [ 30 ], GLSL [ 29 ], and BSL [ 31 ].…”

“…Chromosome regions harboring loci responsible for awn development were decided based on the phenotypic observation of awns more than twice within the 2-to-3-year examination period. Awn-related chromosome regions are highlighted by different colors depends on CSSL in Figure 4 based on the graphical genotype of each CSSL (provided in the original paper of each CSSL [ 24 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ] and Figure 1 B) and positional information of the substituted chromosome with markers were listed in Supplementary Table S2 . For example, awn phenotype was observed two times in WK1962-IL16, which is carrying 0.17–18.5 Mb of chromosome 4 segment of WK1962 ( O. rufipogon ), and in WK1962-IL17, which is carrying 18.5–20.1 Mb of chromosome 4 segment of WK1962 ( Supplementary Table S2 ).…”

“…These 10 sets of CSSL included five CSSLs with the recurrent parent Taichung 65 (T65), which is O. sativa ssp. japonica, and donor parents are O. rufipogon [32], O. nivara [32], O. glumaepatula [33], and two sets of O. meridionalis [34]. The recurrent parent of the other five CSSLs is Koshihikari, which is also O. sativa ssp.…”

Interspecific Hybridization Is an Important Driving Force for Origin and Diversification of Asian Cultivated Rice Oryza sativa L.

“…Series introgression libraries have been developed. Some libraries are single substitute lines (CSSLs) or backcross inbred lines (BILs) from a single donor, including O. glaberrima (Doi et al, 1997;Shim et al, 2010;Yamagata et al, 2019), O. rufipogon (Tian et al, 2005;Furuta et al, 2014;Qin et al, 2018;Ma et al, 2019;Yamagata et al, 2019), O. longistaminata (Ramos et al, 2016), O. nivara (Furuta et al, 2016;Yamagata et al, 2019), O. meridionalis (He et al, 2017), O. bathii (Bessho-Uehara et al, 2017Zhao et al, 2019), and O. glumaepatula (Zhao et al, 2019). Compared with the rich genetic diversity of wild relatives of Asian cultivated rice, the introgression library with a single donor only represents a small part of its genetic diversity.…”

A Genetic Resource for Rice Improvement：introgression Library of Agronomic Traits for All AA&nbsp;Genome Species in Genus Oryza

“…Introgression lines are genetic resource in which the whole genome of a donor genotype is represented by different segments in the genetic background of elite varieties. Genetic background noise of ILs can be eliminated signi cantly, which can be evaluated for any traits improvement over the recurrent parents for rice breeding, also for QTL mapping and gene discovering as a single Mendelian factor, in addition, potential favorable genes hidden in the background of related species could be expressed in the genetic background of cultivated rice (Ballini et al 2007;Eizenga et al 2008;Bian et al 2010;Rama et al 2015;Jin et al 2016;Yang et al 2016;Bhatia et al 2017;Yamagata et al 2019;Bhatia et al 2018). Thus, ILs eliminating hybrid sterility, linkage drags and background noise, are one of the most important genetic resource for QTL mapping, gene identi cation and discovery and rapid utilization for commercial breeding.…”