Chromosomal Location of Male Fertility Restoring Genes in Six Lines of Common Wheat¹

Abstract

A monosomic set of male‐sterile ‘Chris’ (Triticum aestivum L.) with T. timopheevi Zhuk. cytoplasm was used to determine the chromosomal location of Rf‐genes in six male fertility restoring lines (FR‐lines) of T. aestivum L. The six FR‐lines were: R1‐Lee (Nebraska 542437/T. aestivum ‘Lee’), R2‐Sonora 64 (T. timopheevi/2*T. aestivum ‘Marquis’//‘Sonora 64’), R3 (T. timopheevi/3*T. aestivum ‘Marquis’), R4 (amphidiploid T. timopheevi‐Ae. squarrosa/3*T. aestivum ‘Dirk’), R5 (T. Zhukovsky Men. and Er.,/3*T. aestivum ‘Justin’), and T. aestivum ‘Primepi’. The relative proportions of male‐sterile and male‐fertile plants in the F2 and F3 from monosomic F1 indicated that chromosomes 1A and 7D of R1‐Lee, R2‐Sonora 64, R3, R4, and R5 had Rf‐genes. R2‐Sonora 64 and R5 each had a third Rf‐gene on chromosomes 6B and 7B, respectively. Primepi had Rf‐genes on chromosomes 1B and 5D. The inheritance of fertility restoration in control crosses and in some of the noncritical crosses indicated that R1‐Lee, R2‐Sonora 64, and R5 each had three Rf‐genes, and R3, R4, and Primepi each had two. The deficiency of certain chromosomes influenced the penetrance and expressivity of the Rf‐genes in certain crosses.

High-resolution RFLP mapping of the fertility restoration (Rf3) gene against Triticum timopheevi cytoplasm located on chromosome 1BS of common wheat.

“…Although alloplasmic common wheats with the cytoplasm of T. timopheevi had showed male sterility (Wilson and Ross, Gill et al (1996). 1962), seven genes controlling restoration of fertility against timopheevi cytoplasm, namely, Rf1 to Rf7 (Tahir and Tsunewaki, 1969;Yen et al, 1969;Bahl and Maan, 1973) were subsequently reported. Among these genes, Rf3 derived from T. spelta var.…”

“…These are the following: (1) Rf1 located on 1A, restoring fertility to T. timpheevi cytoplasm (Yen et al, 1969;Bahl and Maan, 1973), (2) Rfu1 on 1B against Ae. umbellulata cytoplasm (Tsunewaki, 1974), (3) Rfv1 on 1BS against Ae.…”

“…Since Wilson and Ross (1962) discovered the induction of complete male sterility in common wheat with the cytoplasm of Triticum timopheevi, this cytoplasm has been used intensively for the production of hybrid wheats all over the world. Seven genes are known to control the restoration of fertility against T. timopheevi cytoplasm, and their chromosome locations have been determined, namely, Rf1 (1A), Rf2 (7D), Rf3 (1B), Rf4 (6B), Rf5 (6D), Rf6 (5D), and Rf7 (7B) (Tahir and Tsunewaki, 1969;Yen et al, 1969;Bahl and Maan, 1973). Since the effectiveness of the Rf3 gene derived from T. spelta var.…”

Genetic analysis and molecular mapping of a new fertility restorer gene Rf8 for Triticum timopheevi cytoplasm in wheat (Triticum aestivum L.) using SSR markers

“…Earlier seven Rf genes have been reported to restore fertility against T. timopheevi cytoplasm (G-type), and their chromosomal locations have been determined, as, Rf1 (1A) (Du et al 1991), Rf2 (7D) (Bahl and Maan 1973;Maan et al 1984), Rf3 (1B) (Tahir and Tsunewaki 1969;Zhou et al 2005), Rf4 (6B) (Maan et al 1984), Rf5 (6D) (Bahl and Maan 1973), Rf6 (5D) (Bahl and Maan 1973) and Rf7 (7B) (Bahl and Maan 1973). In addition, some minor QTLs involved in fertility restoration have also been reported on chromosomes 2A, 2B, 4B, 5A 6A and 7D (Ahmed et al 2001;Zhou et al 2005).…”

Investigation of possible associations between partial fertility restoration and agronomic traits in Triticum aestivum L.

“…' This list of cultivars and lines has been compiled from the literature (citation in parenthesis) and also includes additional cultivars and lines identified by the North Dakota State University hybrid wheat program (ND) . 2 These cultivars have been reported to carry a restorer gene on chromosome 1B (3,20) . apparently must be homozygous for fertility expression, and the fertility is first observed in BC1 Fi plants .…”