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- W3036402209 abstract "Abstract Wheat ( Triticum aestivum L. ) is a self-pollinating crop whose hybrids offer the potential to provide a major boost in yield. Male sterility induced by the cytoplasm of Triticum timopheevii is a powerful method for hybrid seed production. Hybrids produced by this method are often partially sterile and full fertility restoration is crucial for wheat production using hybrid cultivars. To identify genetic loci controlling fertility restoration in wheat, we produced two CMS-based backcross (BC 1 ) mapping populations. The restorer lines Gerek 79 and 71R1203 were used to pollinate the male-sterile winter wheat line CMS-Sperber. Seed set and numbers of sterile spikelets per spike were evaluated in 340 and 206 individuals of the populations derived from Gerek 79 and 71R1203, respectively. Genetic maps were constructed using 930 and 994 SNPs, spanning 2,160 and 2,328 cM over 21 linkage groups in the two populations, respectively. Twelve quantitative trait loci (QTL) controlled fertility restoration in both BC 1 populations, including a novel restorer-of-fertility (Rf) locus flanked by the single nucleotide polymorphism (SNP) markers IWB72413 and IWB1550 on chromosome 6AS. The locus was mapped as a qualitative trait in the BC 1 Gerek 79 population and was designated Rf9. Ninety-three putative candidate genes were predicted for the QTL region on chromosome 6AS. Among them were genes encoding tetratricopeptide and pentatricopeptide repeat-containing proteins in rice known to be associated with fertility restoration. This finding is a promising step to better understand the functions of genes for improving hybrid wheat." @default.
- W3036402209 created "2020-06-25" @default.
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- W3036402209 date "2020-06-20" @default.
- W3036402209 modified "2023-10-14" @default.
- W3036402209 title "Identification of a new gene <i>Rf9</i> and unravelling the genetic complexity for controlling fertility restoration in hybrid wheat" @default.
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- W3036402209 doi "https://doi.org/10.1101/2020.06.20.162644" @default.
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