THE GENETICS OF FERTILITY RESTORATION IN CYTOPLASMIC MALE-STERILE RYE

1979 ◽  
Vol 21 (3) ◽  
pp. 417-422 ◽  
Author(s):  
G. J. Scoles ◽  
L. E. Evans
Keyword(s):  
Secale Cereale ◽  
Fertility Restoration ◽  
Inbred Lines ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Cytoplasmic Male Sterile ◽  
Restorer Genes ◽  
Secale Cereale L ◽  
Partial Fertility

Three inbred lines of rye (Secale cereale L.) known to be capable of restoring fertility to a cytoplasmic male-sterile line were crossed with the sterile line. The proportions of male fertile, partially male fertile and male sterile plants in F2 and backcross progenies indicated that three dominant restorer genes were present in each line. These were designated Rf1, Rf2 and Rf3, their relative expressivity was Rf1>Rf2>Rf3. Expressivity was dependent upon environment. Partial fertility occurred when certain genotypes carried two of the three alleles as dominant, but was dependent upon genotype and environment.

THE TRANSFER OF A CYTOPLASMIC MALE-STERILITY SYSTEM TO SPRING RYE

1979 ◽  
Vol 59 (1) ◽  
pp. 163-169 ◽  
Author(s):  
G. J. SCOLES ◽  
L. E. EVANS
Keyword(s):  
Cytoplasmic Male Sterility ◽  
Environmental Effects ◽  
Secale Cereale ◽  
Fertility Restoration ◽  
Inbred Lines ◽  
Winter Rye ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Secale Cereale L ◽  
Restoration Of Fertility

Six inbred lines of spring rye (Secale cereale L.) and an open-pollinated cultivar of spring rye were crossed with a cytoplasmic male-sterile line of winter rye. The open-pollinated cultivar and all except one inbred line exhibited segregation for fertility restoration. Through further inbreeding, sub-lines of certain breeds were obtained which were homozygous for maintenance of sterility or for restoration of fertility. Environmental effects on the expression of fertility restoration were detected.

scholarly journals A nuclear gene modifying instability of fertility restoration in cytoplasmic male sterile rice

1992 ◽  
Vol 60 (3) ◽  
pp. 195-200 ◽  
Author(s):  
Yoshio Sano ◽  
Mitsugu Eiguchi ◽  
Hiro-Yuki Hirano ◽  
Masa-Aki Yamada
Keyword(s):  
Seed Set ◽  
Fertility Restoration ◽  
Dominant Gene ◽  
Nuclear Gene ◽  
Male Sterile ◽  
Substitution Lines ◽  
Seed Fertility ◽  
Cytoplasmic Male Sterile ◽  
Gametic Selection ◽  
Partial Fertility

SummaryThe present study was carried out to examine the genetic mechanism responsible for reversions to fertile phenotype detected in cytoplasmic male-sterile plants of rice. The cms-bo cytoplasm of Chinsurah boro II gave rise to male-sterility in plants without a gametophytic restorer gene (Rf1). Taichung 65 (T65A) was known to be the maintainer which carries no restorer; however, Taichun 65 preserved in our laboratory (T65B) showed partial fertility (about 8% seed set) when crossed with the male-sterile plants. Unexpectedly, the seed fertility gradually increased with repeated selfings and almost fully fertile plants were obtained in the F6 generation. The cytoplasmic substitution lines revealed that reversions to fertile phenotype resulted from mutational events at the nuclear level. The genetic experiments indicated that the partial fertility observed in the F1 hybrid was controlled by a dominant gene, Ifr1, which was carried by T65B. The results obtained suggested that Ifr1 itself was associated with instability of fertility restoration in the presence of cms-bo cytoplasm since partially fertile plants carrying Ifr1 always showed a tendency for gradual increase in fertility in the later generations. The results are also discussed in relation to a rapid genetic change through intensified gametic selection combined with instability.

scholarly journals Mutator-Induced Mutations of the rf1 Nuclear Fertility Restorer of T-Cytoplasm Maize Alter the Accumulation of T-urfl3 Mitochondrial Transcripts

Genetics ◽  
1996 ◽  
Vol 143 (3) ◽  
pp. 1383-1394
Author(s):  
Roger P Wise ◽  
Carren L Dill ◽  
Patrick S Schnable
Keyword(s):  
Pollen Fertility ◽  
Fertility Restoration ◽  
Mitochondrial Rna ◽  
Induced Mutations ◽  
Male Sterile ◽  
Fertility Restorer ◽  
Restorer Genes ◽  
Mitochondrial Transcripts ◽  
Ecori Restriction ◽  
Fertility Restorer Genes

Abstract Dominant alleles of the rf1 and rf2 nuclear-encoded fertility restorer genes are necessary for restoration of pollen fertility in T-cytoplasm maize. To further characterize fertility restoration mediated by the Rf1 allele, 123,500 gametes derived from plants carrying the Mutator transposable element family were screened for rf1-mutant alleles (rf1-m) Four heritable rf1-m alleles were recovered from these populations. Three rf1-m alleles were derived from the progenitor allele Rf1-IAl53 and one was derived from Rf1-Ky21. Cosegregation analysis revealed 5.5- and 2.4kb Mu1-hybridizing EcoRI restriction fragments in all of the male-sterile and none of the male-fertile plants in families segregating for rf1-m3207 and rf1-m3310, respectively. Mitochondrial RNA gel blot analyses indicated that all four rf1-m alleles in male-sterile plants cosegregated with the altered steady-state accumulation of 1.6 and O.6-kb T-urf13 transcripts, demonstrating that these transcripts are Rf1 dependent. Plants carrying a leaky mutant, rf1-m7323, revealed variable levels of Rf1-associated, T-urf13 transcripts and the degree of pollen fertility. The ability to obtain rf1-m derivatives from Rf1 indicates that Rf1 alleles produce a functional gene product necessary for the accumulation of specific T-urf13 transcripts in T-cytoplasm maize.

scholarly journals INHERITANCE OF FERTILITY RESTORATION INVOLVING WILD ABORTIVE CYTOPLASMIC MALE STERILITY SYSTEM IN RICE (Oryza sativa L.)

2011 ◽  
Vol 24 (1) ◽  
pp. 33-40
Author(s):  
M. J. Hasan ◽  
M. U. Kulsum ◽  
A. Ansari ◽  
A. K. Paul ◽  
P. L. Biswas
Keyword(s):  
Oryza Sativa ◽  
Cytoplasmic Male Sterility ◽  
Male Sterility ◽  
Gene Action ◽  
Oryza Sativa L ◽  
Fertility Restoration ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Male Sterile ◽  
Male Sterile Line

Inheritance of fertility restoration was studied in crosses involving ten elite restorer lines of rice viz. BR6839-41-5-1R, BR7013-62-1-1R, BR7011-37-1-2R, BR10R, BR11R, BR12R, BR13R, BR14R, BR15R and BR16R and one male sterile line Jin23A with WA sources of cytoplasmic male sterility. The segregation pattern for pollen fertility of F2 and BC1 populations of crosses involving Jin23A indicated the presence of two independent dominant fertility restoring genes. The mode of action of the two genes varied in different crosses revealing three types of interaction, i.e. epistasis with dominant gene action, epistasis with recessive gene action, and epistasis with incomplete dominance.DOI: http://dx.doi.org/10.3329/bjpbg.v24i1.16997

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