Effects of Inbreeding on Fertility in
            <i>Medicagos sativa</i>
            L.
            <sup>1</sup>

Busbice, T. H.

doi:10.2135/cropsci1968.0011183x000800020029x

Cited by 34 publications

(21 citation statements)

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“…This is in agreement with the finding of Krebs & Hancock (1990) that the number of developed seeds per fruit were reduced as the zygotic level of inbreeding increased in V. corymbosum. The nonlinear response to increasing levels of zygotic inbreeding observed in this study was similar to the nonlinear response of seeds per flower to coefficient of inbreeding in alfalfa (Busbice & Wilsie, 1966;Busbice, 1968). Like alfalfa, the highbush blueberry is an autotetraploid with tetrasomic inheritance (Krebs & Hancock, 1989).…”

Section: Parental Combining Ability and Inbreeding Depressionsupporting

confidence: 81%

“…Both percent fruit set and seeds per pollination responses were significantly higher (p _< 0.01) for the two families in which the wild clones were used as the fe- male parent (Tables 4 and 5). Maternal effects for self fertility have been observed in V. corymbosum (Krebs & Hancock, 1990) and Medicago sativa L. (Busbice, 1968). Maternal effects may result from cytoplasmic gene action or from deleterious traits of the maternal parent that negatively affect the developing embryos or zygotes.…”

Section: Parental Combining Ability and Inbreeding Depressionmentioning

confidence: 99%

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Genetic characteristics of self fertility in highbush and half-high blueberries

1993

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Parents and ten progeny from each of ten controlled crosses, and thirteen progeny from G65 x 'Ashworth' were self and outcross pollinated to study the inheritance of self fertility and the associations between self fertility and zygotic inbreeding levels in highbush and half-high blueberry genotypes. Reductions in self fertility were apparently a response to increased inbreeding. Both percent fruit set and seeds per pollination were negatively associated with family zygotic inbreeding coefficients. Although inbreeding depression was responsible for much of the observed self fertility responses, an environmental component was apparent as well. A continuous distribution of self fertility levels among the G65 x 'Ashworth' progeny provided little evidence for simple inheritance of this trait. Estimates of heritability were not significant and some evidence of specific combining ability was detected, indicating that parental self fertility was not predictive of the self fertility of the progeny in this study. Variation for self fertility including high levels in some individuals indicates a potential level of self fertility which could be incorporated into future selections and cultivars.

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Section: Parental Combining Ability and Inbreeding Depressionsupporting

confidence: 81%

Section: Parental Combining Ability and Inbreeding Depressionmentioning

confidence: 99%

Genetic characteristics of self fertility in highbush and half-high blueberries

1993

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“…Cultivated alfalfa is an autotetraploid (2n = 4x = 32) characterized by extreme heterozygosity and severe inbreeding depression (Busbice, 1968), which has been a major hindrance for the improvement of alfalfa.…”

Section: Introductionmentioning

confidence: 99%

Association of AFLP and SCAR markers with common leafspot resistance in autotetraploid alfalfa (Medicago sativa)

Wang¹,

Bi²,

Yuan³

et al. 2012

Genet. Mol. Res.

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ABSTRACT. To identify amplified fragment length polymorphism (AFLP) markers associated with resistance or susceptibility of alfalfa to common leafspot (CLS) caused by the fungus Pseudopeziza medicaginis (Dermateaceae), bulked segregant analysis was conducted based on an F 1(M × M) population of 93 plants and a BC 1 S population of 91 plants. Three AFLP markers, ACTCAA R206 , TAGCAC R185 , and GGACTA S264 , were found to be associated with CLS resistance or susceptibility. All three markers were found at significantly different frequencies (71.9, 80.3 and 91.8%) compared to resistant or susceptible plants in the original population. Subsequently, these three AFLP markers were converted into three SCAR markers, ACTCAA R136 , TAGCAC R128 and GGACTA S254 , which are easier to employ in breeding programs. The three SCAR markers were used in a randomly selected population with 50% resistance; the probability of finding one resistant plant was increased to 67.3, 66.7 and 90.0% with markers ACTCAA R136 , TAGCAC R128 and GGACTA S254 , independently. If two of the SCAR markers were used simultaneously, the probability would be higher than 89%. The three SCAR markers identified in this study would be applicable for selection for CLS resistance in alfalfa breeding programs. Moreover, the genetic analysis indicated that CLS resistance in alfalfa is conferred by a single dominant gene.

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“…falcata. Most lucerne cultivars are genetically broad-based synthetics developed by randomly intermating elite S 0 clones (genotypes) and advancing through several generations by open pollination (Busbice 1968;Hill et al 1988). The breeding methodologies in lucerne, based on recurrent selection and polycrossing to produce synthetic varieties, have changed little over the last 60 years (Tysdal et al 1942).…”

Section: Introductionmentioning

confidence: 99%

DNA markers linked to yield, yield components, and morphological traits in autotetraploid lucerne (Medicago sativa L.)

Musial

Lowe²,

Mackie

et al. 2006

Aust. J. Agric. Res.

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Abstract. We have mapped and identified DNA markers linked to morphology, yield, and yield components of lucerne, using a backcross population derived from winter-active parents. The high-yielding and recurrent parent, D, produced individual markers that accounted for up to 18% of total yield over 6 harvests, at Gatton, south-eastern Queensland. The same marker, AC/TT8, was consistently identified at each individual harvest, and in individual harvests accounted for up to 26% of the phenotypic variation for yield. This marker was located in linkage group 2 of the D map, and several other markers positively associated with yield were consistently identified in this linkage group. Similarly, markers negatively associated with yield were consistently identified in the W116 map, W116 being the low-yielding parent. Highly significant positive correlations were observed between total yield and yield for harvests 1-6, and between total yield and stem length, tiller number, leaf yield/plant, leaf yield/5 stems, stem yield/plant, and stem yield/5 stems. Highly significant QTL were located for all these characters as well as for leaf shape and pubescence.

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Effects of Inbreeding on Fertility in Medicagos sativa L. ¹

Cited by 34 publications

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Genetic characteristics of self fertility in highbush and half-high blueberries

Genetic characteristics of self fertility in highbush and half-high blueberries

Association of AFLP and SCAR markers with common leafspot resistance in autotetraploid alfalfa (Medicago sativa)

DNA markers linked to yield, yield components, and morphological traits in autotetraploid lucerne (Medicago sativa L.)

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Effects of Inbreeding on Fertility in Medicagos sativa L. 1

Cited by 34 publications

References 0 publications

Genetic characteristics of self fertility in highbush and half-high blueberries

Genetic characteristics of self fertility in highbush and half-high blueberries

Association of AFLP and SCAR markers with common leafspot resistance in autotetraploid alfalfa (Medicago sativa)

DNA markers linked to yield, yield components, and morphological traits in autotetraploid lucerne (Medicago sativa L.)

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Effects of Inbreeding on Fertility in Medicagos sativa L. ¹