Homozygosity and S Gene Mutation

Brewbaker, J. L.; Shapiro, N.I.

doi:10.1038/1831209a0

Cited by 18 publications

(11 citation statements)

References 4 publications

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“…alata than was possible in other species (approx. values in Enothera organensis-5000, Prunus avium-i io (Lewis, 1948); in Trfo1ium prateflSe-250, T. rep ens -360 (Pandey, 1956); in Petunia infiata-1800-4500 (Brewbaker and Shapiro, 1959)). Thus with a total of only 743 pollinations with X-rays, 284 without X-rays) approximately I 293 million pollen grains were tested, assuming all pollen grains applied to the stigma had an equal chance of fertilising ovules.…”

Section: Results (I) Mutation Ratementioning

confidence: 99%

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Elements of the S-gene complex II. Mutation and complementation at the SI locus in Nicotiana alata

Pandey¹

1967

Heredity

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Section: Results (I) Mutation Ratementioning

confidence: 99%

“…the apparent lack of s-part mutation in the homozygous Petunia genotypes (Brewbaker and Shapiro, 1959). There is a distinct possibility that the mutant pollen with the fragment giving rise to the Hom.…”

Section: S1s3fr5mentioning

confidence: 99%

Elements of the S-gene complex II. Mutation and complementation at the SI locus in Nicotiana alata

Pandey¹

1967

Heredity

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“…i t is more attractive to break self-incompatibility by mutation of incompatibility genes, as has been previously applied in Oenothera (LEWIS, 1949(LEWIS, , 1951, Prunus (LEWIS and CROWE, 1954), Trifolium (PANDEY, 1956), Petunia SHAPIRO, 1959 : BREWBAKER andNATARAJAN, 1960) and Nicotiana (PANDEY, 1965(PANDEY, , 1967 . Earlier attempts to break the self-incompatibility in L .…”

Section: Introductionmentioning

confidence: 99%

Breaking breeding barriers in Lycopersicon. 2. Breakdown of self-incompatibility in L. peruvianum (L.) Mill.

Hogenboom¹

1972

Euphytica

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Attempts were made to break the self-incompatibility in L. peruvianum by selection of mutated S-alleles through large-scale self-pollination on clones with pollen which was mutagenically treated in different stages of development . Besides self-compatibility was searched for in inbred lines .The self-incompatibility in L. peruvianum was found to be very strict indeed . From more than 22,000 self-pollinations on 5 clones 1527 seeds were obtained, seed set being very erratic . The possible causes of this seed set are discussed . From 1527 seeds 1036 plants were raised and tested for self-compatibility .In the progenies of 4 clones from 823 plants tested, 7 were more or less self-compatible . It is concluded that this self-compatibility was spontaneous and not the result of the mutagenic treatment .In the progeny of the fifth clone plants were found which reacted as self-compatible at a temperature of about 40°C and as self-incompatible at lower temperatures . It is suggested that this character -a high temperature sensitive incompatibility reactionis governed by one recessive gene .In inbred lines plants were found with a stable form of self-compatibility and also plants with a high temperature sensitive incompatibility reaction.The problems of an incompatibility research on inbred material are discussed . A brief survey is given of some of the characters found in inbred L . peruvianum .

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“…Self-compatible pollen-part mutants obtained by selfing or by crossing nominally incompatible plants using x-irradiated pollen have been described not only in P. avium, but also in Oenothera organensis of the Onagraceae (Lewis, 1949(Lewis, , 1951, Petunia inflata (Brewbaker and Shapiro, 1959), and Nicotiana alata (Pandey, 1965). Brewbaker and Natarajan (1960) found that all pollen-part mutants studied in P. inflata carried a centric fragment.…”

Section: Introductionmentioning

confidence: 99%

Loss of Pollen-S Function in Two Self-Compatible Selections of Prunus avium Is Associated with Deletion/Mutation of an S Haplotype–Specific F-Box Gene

et al. 2004

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Recently, an S haplotype-specific F-box (SFB) gene has been proposed as a candidate for the pollen-S specificity gene of RNase-mediated gametophytic self-incompatibility in Prunus (Rosaceae). We have examined two pollen-part mutant haplotypes of sweet cherry (Prunus avium). Both were found to retain the S-RNase, which determines stylar specificity, but one (S 3 9 in JI 2434) has a deletion including the haplotype-specific SFB gene, and the other (S 4 9 in JI 2420) has a frame-shift mutation of the haplotype-specific SFB gene, causing amino acid substitutions and premature termination of the protein.The loss or significant alteration of this highly polymorphic gene and the concomitant loss of pollen self-incompatibility function provides compelling evidence that the SFB gene encodes the pollen specificity component of self-incompatibility in Prunus. These loss-of-function mutations are inconsistent with SFB being the inactivator of non-self S-RNases and indicate the presence of a general inactivation mechanism, with SFB conferring specificity by protecting self S-RNases from inactivation.

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Homozygosity and S Gene Mutation

Cited by 18 publications

References 4 publications

Elements of the S-gene complex II. Mutation and complementation at the SI locus in Nicotiana alata

Elements of the S-gene complex II. Mutation and complementation at the SI locus in Nicotiana alata

Breaking breeding barriers in Lycopersicon. 2. Breakdown of self-incompatibility in L. peruvianum (L.) Mill.

Loss of Pollen-S Function in Two Self-Compatible Selections of Prunus avium Is Associated with Deletion/Mutation of an S Haplotype–Specific F-Box Gene

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