Genetic mapping of nuclear fertility restorer genes for the ‘Polima’ cytoplasmic male sterility in canola (Brassica napus L.) using DNA markers

1997 ◽  
Vol 95 (3) ◽  
pp. 321-328 ◽  
Author(s):  
M. Jean ◽  
G. G. Brown ◽  
B. S. Landry
Keyword(s):  
Brassica Napus ◽  
Genetic Mapping ◽  
Cytoplasmic Male Sterility ◽  
Male Sterility ◽  
Dna Markers ◽  
Fertility Restorer ◽  
Brassica Napus L ◽  
Restorer Genes ◽  
Fertility Restorer Genes

Identification and Inheritance of Fertility Restorer Genes for 'tour' CMS in Rapeseed (Brassica napus L.)

1994 ◽  
Vol 112 (3) ◽  
pp. 223-227 ◽  
Author(s):  
Y. S. Sodhi ◽  
A. K. Pradhan ◽  
J. K. Verma ◽  
N. Arumugam ◽  
A. Mukhopadhyay ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Fertility Restorer ◽  
Brassica Napus L ◽  
Restorer Genes ◽  
Fertility Restorer Genes

Inheritance of male fertility restoration and allelism of restorer genes for the Polima cytoplasmic male sterility system in oilseed rape

Genome ◽  
1989 ◽  
Vol 32 (6) ◽  
pp. 1044-1047 ◽  
Author(s):  
G. H. Fang ◽  
P. B. E. McVetty
Keyword(s):  
Cytoplasmic Male Sterility ◽  
Male Sterility ◽  
Male Fertility ◽  
Fertility Restoration ◽  
Restorer Gene ◽  
Fertility Restorer ◽  
Brassica Napus L ◽  
Restorer Genes ◽  
Segregation Ratios ◽  
Male Fertility Restoration

The inheritance of male fertility restoration for the pol cytoplasmic male sterility (CMS) system in summer rape (Brassica napus L.) was determined. Male fertility:sterility segregation ratios observed in F2 and backcross generations derived from crosses and backcrosses between two pol CMS A lines and the male fertility restorer gene(s) sources Italy and UM2353 were used in this study. Italy and UM2353 were found to possess a single Mendelian dominant gene with high male fertility restoration capabilities for the pol CMS system. Tests for allelism of the restorer genes were also conducted using male fertility:sterility segregation ratios observed in F3 families derived from crosses between F1 plants containing genes for male fertility restoration from the Italy and UM2353 restorer gene sources. The male fertility restorer gene from Italy (designated Rfp1) was found to be different (i.e., nonallelic) from the restorer gene possessed by UM2353 (designated Rfp2).Key words: Brassica napus L., oilseed rape, male fertility restoration, pol cytoplasmic male sterility.

Evaluation of the cost of restoration of male fertility in Brassica napus

Botany ◽  
2014 ◽  
Vol 92 (11) ◽  
pp. 847-853 ◽  
Author(s):  
Benjamin R. Montgomery ◽  
Maia F. Bailey ◽  
Gregory G. Brown ◽  
Lynda F. Delph
Keyword(s):  
Brassica Napus ◽  
Sex Determination ◽  
Cytoplasmic Male Sterility ◽  
Male Sterility ◽  
Male Fertility ◽  
Fertility Restoration ◽  
Brassica Napus L ◽  
Pollen Counts ◽  
Restorer Genes ◽  
The Cost

Gynodioecy frequently results from the interplay of mitochondrial cytoplasmic male sterility (CMS) and nuclear fertility-restoration genes. Models suggest that maintaining cytonuclear gynodioecy requires that restorer genes incur a cost to fitness because otherwise they would increase toward fixation. Direct tests of costs of restorer alleles require knowledge of the underlying genetics of sex determination. We use a well characterized CMS system in Brassica napus L. to measure aspects of fitness in four lineages that vary in whether they carry the pol CMS gene or male-fertile cytoplasm (cam), and whether they carry the Rfp restorer of pol or Rfn restorer of the nap CMS gene. As expected, plants with pol CMS and only the Rfn restorer experienced reduced flower size, stamen length, and pollen counts. Plants with pol and the Rfp restorer showed incomplete restoration with shorter stamens than both lines with cam cytoplasm and reduced pollen counts compared with plants with cam cytoplasm and the Rfp restorer. Among plants with cam cytoplasm, pollen counts were higher for those with the Rfp than Rfn restorer, indicating a greater cost of restoration associated with Rfn. These results demonstrate that costs of restoration differ for the Rfn and Rfp alleles in B. napus.

Cytoplasmic male sterility in rapeseed (Brassica napus L.): female fertility of restored rapeseed with "Ogura" and cybrids cytoplasms

Genome ◽  
1988 ◽  
Vol 30 (2) ◽  
pp. 234-238 ◽  
Author(s):  
R. Pellan-Delourme ◽  
M. Renard
Keyword(s):  
Brassica Napus ◽  
Cytoplasmic Male Sterility ◽  
Male Sterility ◽  
Male Fertility ◽  
Raphanus Sativus ◽  
Seed Set ◽  
Embryo Sac ◽  
Female Fertility ◽  
Brassica Napus L ◽  
Restorer Genes

The study of Brassica napus L. plants carrying restorer genes introgressed from radish (Raphanus sativus L.) showed that these genes ensured restoration of male fertility in rapeseed for all the male sterility-inducing cytoplasm studied, i.e., "Ogura"-type cytoplasm and that of four cybrids obtained by protoplast fusion. Plants with high levels of restored male fertility were obtained. However, the introduction of restorer genes was accompanied by a large decrease in seed set. Observations of embryo sacs inside the ovules and correlation between number of seeds per pod and percentage of octonucleate embryo sacs indicated that low seed set could be attributed to a high rate of embryo sac abortion, mainly at the uninucleate stage. Introduction of too much radish genetic information was assumed to be the cause of this low female fertility. Female fertility must be improved before the restored material can be used for F1 hybrid rapeseed production.Key words: Brassica napus, Raphanus sativus, cytoplasmic male sterility, restorer, cybrid, female fertility, embryo sac.

Inheritance of maintenance and restoration of the Diplotaxis muralis (mur) cytoplasmic male sterility system in summer rape

2003 ◽  
Vol 83 (3) ◽  
pp. 515-518 ◽  
Author(s):  
T. C. Riungu ◽  
P. B. E. McVetty
Keyword(s):  
Brassica Napus ◽  
Cytoplasmic Male Sterility ◽  
Male Sterility ◽  
Male Fertility ◽  
Hybrid Seed Production ◽  
Male Sterile ◽  
Brassica Napus L ◽  
Restorer Genes ◽  
Ready Availability ◽  
System Maintenance

The inheritance of Diplotaxis muralis (L) DC. mur cytoplasmic male sterile (CMS) system maintenance and restoration in summer rape (Brassica napus L.) was studied by crossing eight summer rape cultivars of diverse origin to a winter habit mur CMS A-line. The F1 progenies from all eight crosses were male fertile and were selfed to produce the F2 generation. The F2 generation was grown in the field and data on segregation for male fertility and sterility were recorded and analyzed. The F2 segregation data showed that mur CMS restoration in summer rape is controlled by dominant alleles at one to three restorer genes. The number of genes for the restoration of male fertility in mur CMS varied both among and, occasionally, within cultivars. Maintainer lines for mur CMS must carry recessive alleles in homozygous condition at all three restorer genes. The ready availability of summer rape restorers suggests that the mur CMS system has good potential for hybrid cultivar development and hybrid seed production in summer rape; however, maintainers in summer rape must first be discovered or developed. Key words: Cytoplasmic male sterility, canola, Brassica napus, male sterility

Male sterility in Indian mustard (Brassica juncea (L.) Coss). IV. Genetics of MS-4

1985 ◽  
Vol 27 (5) ◽  
pp. 487-490 ◽  
Author(s):  
Surinder S. Banga ◽  
K. S. Labana
Keyword(s):  
Male Sterility ◽  
Brassica Juncea ◽  
Indian Mustard ◽  
Field Trials ◽  
Genetic Constitution ◽  
Male Sterile ◽  
Fertility Restorer ◽  
Male Sterile Plant ◽  
Restorer Genes ◽  
Fertility Restorer Genes

Male sterile plants of Indian mustard (Brassica juncea (L.) Coss.) were observed in the F2 generation of the cross RLM-198 × EJ-33. The genetic analysis revealed that male sterility occurred when the cytoplasm of RLM-198 interacted with recessive nuclear genes of EJ-33. The genetic constitution of RLM-198 was postulated to be (S) RF RF, EJ-33 as (F) rf rf, and the male sterile plants as (S) rf rf. Varieties of Indian mustard from India mostly contained dominant fertility restorer genes, while European varieties had a greater frequency of the recessive maintainer genes. None of these varieties, however, was capable of complete maintenance of male sterility. Heterosis for yield up to 56% over the national check was observed in field trials. The use of this cytoplasmic male sterile plant in hybrid mustard production will not be economical, until a complete maintainer for male sterility is identified.Key words: Brassica juncea, Indian mustard, male sterility, hybrids.

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