Pseudo-self compatibility (PSC) in Petunia integrifolia

Dana, Michael N.; Ascher, Peter D.

doi:10.1093/oxfordjournals.jhered.a110147

Cited by 16 publications

(9 citation statements)

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“…For example, in Petunia integrifolia two cycles of selection increased the level of self-fertility from ca. 0.0% to 25.3% (Dana and Ascher 1985). In Nemesia strumosa, four generations of inbreeding and selection increased the level of self-fertility from a few percent to 100% (Ro- backer and Ascher 1978).…”

Section: Discussionmentioning

confidence: 99%

“…Plant breeders have successfully selected for increased self-fertility in cultivars of several predominantly outcrossing species (Villegas et al 1971;Richards and Thurling 1973;Busbice et al 1975;Henny and Ascher 1976;Robacker and Ascher 1978;1982;Dana and Ascher 1985;Yamada et al 1989). Selection lines in most cultivars were developed by inbreeding, which would accelerate the rate of response by increasing the genetic variance among individuals.…”

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confidence: 99%

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RESPONSE TO SELECTION ON AUTOGAMY IN PHLOX

Bixby

Levin

1996

Evolution

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Two cycles of artificial selection were performed to increase autogamous fruiting in two wild populations of the self-incompatible Phlox drummondii, to decrease autogamous fruiting in two wild populations of the self-compatible Phlox cuspidata, and to both increase and decrease autogamous fruiting in a cultivar of P. drummondii which is pseudo-self-compatible. The breeding systems were determined to be genetically quite flexible, independent of inbreeding depression and other genetic phenomena which could hinder a breeding system shift. This is especially true for increasing autogamy. Self-pollen-pistil compatibility seems to be the single character affected by selection. Based on the continuous variation in both autogamy and self-compatibility, we suggest that the change has been due to genes which modify the self-incompatibility reaction rather than to the simple segregation of alleles at the S-locus.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

RESPONSE TO SELECTION ON AUTOGAMY IN PHLOX

Bixby

Levin

1996

Evolution

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“…Variation in autogamy levels within Phlox sibships also, in part, may be attributable to temperature differences within the greenhouse. The effect of temperature on self-fertility has been demonstrated in Petunia integrifolia (Dana & Ascher, 1985), Trifolium hybridum (Townsend, 1968), Lycopersicon peruvianum (Williams & Knox, 1982), Brassica campestris (Richards & Thurling, 1973) and Secale cereale (Wricke, 1979).…”

Section: Discussionmentioning

confidence: 99%

Effect of inbreeding on autogamy in Phlox

Levin

1995

Heredity

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The effect of inbreeding on autogamy was studied in two greenhouse-grown populations of the weakly self-compatible Phlox drummondii. Sixty-one plants from a Lytle, TX. population and 20 plants from a Bastrop, TX. population were self-fertilized to generate an equivalent number of 10-plant self families. The mean level of autogamy in the Lytle progeny was 2.49 per cent vs. 1.03 per cent in their parents. The mean level of autogamy in the Bastrop progeny was 13.35 per cent vs.5.95 per cent in their parents. Autogamy within families was continuous and often broadly distributed, suggesting that it was influenced by a segregating polygenic system which modifies Sgene expression. The heritability of autogamy in the Bastrop population was 0.45, as estimated from the regression of offspring on mid-parent values.

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“…Also, progeny array analysis revealed a heterogeneous selfing rate among families. Reproductive systems are known to respond rapidly to selection (Henny & Ascher, 1976), Petunia integrifolia (Dana & Ascher, 1985) and Phlox drummondii (Levin, 1995; Bixby & Levin, 1996). Furthermore, Good‐Avila & Stephenson (2002) report inheritance of modifiers conferring self‐fertility in the partially self‐incompatible perennial, Camapanula rapunculoides L. (Campanulaceae).…”

Section: Factors Influencing Mating System Evolutionmentioning

confidence: 99%

Mating system variation along a successional gradient in the allogamous and colonizing plant Crepis sancta (Asteraceae)

Cheptou

Lepart

Escarré

2002

Journal of Evolutionary Biology

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We analysed mating system in an annual and colonizing plant, Crepis sancta, that occupies different successional stages in the French Mediterranean region. Based on a previous experiment, we hypothesized that low inbreeding depression measured in young successional stages should select for selfing whereas higher inbreeding depression in old stages should select for outcrossing. Nine populations of C. sancta (Asteraceae) from contrasting successional stages were used to analyse (1) Seed set after autonomous and enforced selfing in controlled conditions and (2) outcrossing rates in natural conditions using allozymes (progeny array analysis). We found that C. sancta possesses a pseudo-self-incompatibility system and that mating system varies among populations. Allozymes revealed that the population multilocus outcrossing rates vary from 0.77 to 0.99. The lowest outcrossing rates occur in the youngest successional stages and complete outcrossing is found in old stages. The data partially agree with the predictions we made and the results are more generally discussed in the light of factors changing during succession. We did not find any evidence of reproductive assurance in the nine populations, contrary to what is often assumed as a major factor governing mating system evolution in colonizing species. We propose that mating system variation can be interpreted as the result of the balance between the cost of outcrossing and inbreeding depression in a metapopulation context.

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Pseudo-self compatibility (PSC) in Petunia integrifolia

Cited by 16 publications

References 0 publications

RESPONSE TO SELECTION ON AUTOGAMY IN PHLOX

RESPONSE TO SELECTION ON AUTOGAMY IN PHLOX

Effect of inbreeding on autogamy in Phlox

Mating system variation along a successional gradient in the allogamous and colonizing plant Crepis sancta (Asteraceae)

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