Registration of ‘Southwest Runner’ Peanut

Kirby, J. S.; Melouk, H. A.; Stevens, Tilele; Banks, D. J.; Sholar, J. R.; Damicone, J. P.; Jackson, Ken

doi:10.2135/cropsci1998.0011183x003800020065x

Cited by 20 publications

(14 citation statements)

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“…Although considered a runner peanut, Southwest runner has an extremely erect growth habit and thus an open canopy instead of the dense canopy required for disease progression. Thus, the absence of the 145 bp band in the Southwest Runner genome could be explained by physiological resistance since one of the parents of this cultivar is of Spanish decent (Kirby et al 1998). Table 2 shows the correlation of the resistant marker band with Sclerotinia blight resistance and the eVect of market type.…”

Section: Resultsmentioning

confidence: 99%

Discovery and characterization of a molecular marker for Sclerotinia minor (Jagger) resistance in peanut

Chenault¹,

Maas²,

Damicone

et al. 2008

Euphytica

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The production of cultivated peanut, an important agronomic crop throughout the United States and the world, is consistently threatened by various diseases and pests. Sclerotinia minor Jagger (S. minor), the causal agent of Sclerotinia blight, is a major threat to peanut production in the Southwestern US, Virginia and North Carolina. Although information on the variability of morphological traits associated with Sclerotinia blight resistance is plentiful, no molecular markers associated with resistance have been reported. The identiWcation of markers would greatly assist peanut geneticists in selecting genotypes to be used in breeding programs. The main objective of this work was to use simple sequence repeat (SSR) primers previously reported for peanut to identify a molecular marker associated with resistance to S. minor. Out of 16 primer pairs used to examine peanut genomic DNA from 39 diVerent genotypes, one pair produced bands at approximately 145 and 100 bp, consistent with either S. minor resistance or susceptibility, respectively. Cloning and sequencing of these bands revealed the region is well conserved among all genotypes tested with the exception of the length of the SSR region, which varies with disease resistance levels. This is the Wrst report of a molecular marker associated with resistance to Sclerotinia blight in peanut. The identiWcation of this marker and development of a PCR-based screening method will prove to be extremely useful to peanut breeders in screening germplasm collections and segregating populations as well as in pyramiding S. minor resistance with other desirable traits into superior peanut lines. Abbreviations ABLAdvanced breeding line AFLP AmpliWed fragment length polymorphism QTL Quantitative trait loci RAPD Random ampliWed polymorphic DNA RFLP Restriction fragment length polymorphism SCAR Sequence characterized ampliWed region SSR Simple sequence repeat Cultivated peanut (Arachis hypogaea L.) is a selfpollinated allotetraploid (2n = 4x = 40), which is

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Section: Resultsmentioning

confidence: 99%

Discovery and characterization of a molecular marker for Sclerotinia minor (Jagger) resistance in peanut

Chenault¹,

Maas²,

Damicone

et al. 2008

Euphytica

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“…Tamspan 90 (32) is a spanish cultivar with both architectural and physiologic partial resistance (1). Southwest Runner (22) is a runner-type cultivar with sparsely arranged large leaves and a prominently erect main stem that is susceptible in detached stem and seedling inoculations in the greenhouse. Both Tamspan 90 and Southwest Runner are consistently among the most resistant cultivars in field evaluations.…”

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confidence: 99%

Reaction of the Core Collection of Peanut Germplasm to Sclerotinia Blight and Pepper Spot1

Damicone¹,

Holbrook²,

Smith³

et al. 2010

Peanut Science

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In 2001, entries from the peanut core collection, a subset of the USDA peanut germplasm collection, were planted in non-replicated plots in a field with a history of Sclerotinia blight caused by Sclerotinia minor. Variability existed among entries for reaction to Sclerotinia blight. Of the 744 entries evaluated, 11% had no disease, nearly 30% had ,10% disease incidence, and only 21% had 50% disease incidence or more. Most of the resistant entries had an upright growth habit and were in early and mid-maturity groups. Many of the early maturing entries were susceptible to the foliar disease pepper spot which occurred throughout the study. Entries were selected for further evaluation in replicated plots based on a nil to low (,10% 208, 128, 804, 582, and 273 combined resistance to Sclerotinia blight, pepper spot, and web blotch with less than erect growth habits. Entry 103 had good Sclerotinia blight resistance and yield, but an upright growth habit. Entry 92 had an upright growth habit and low yield, but good Sclerotinia blight resistance. Entries 92 and 103 had upright growth habits but were among the best entries for resistant to pepper spot and web blotch. Entries 426, 184, and 562 were upright and susceptible to pepper spot, but had resistance to web blotch and the best resistance to Sclerotinia blight. These entries appear to be useful sources of resistance to Sclerotinia blight for breeding programs and for increasing the probability of finding additional sources of resistance in clusters of germplasm identified within the entire USDA collection.

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“…The cultivars Tamspan 90, Southwest Runner, Okrun, and Flavor Runner 458 were utilized in this study. Tamspan 90, a spanish market type, and Southwest Runner, a runner market type, have moderate resistance to S. minor (Smith et al, 1991b; Kirby et al, 1998). Okrun and Flavor Runner 458 were included as susceptible runner type peanut with good agronomic qualities (Banks et al, 1989).…”

Section: Methodsmentioning

confidence: 99%

Removal of Apical Dominant Shoot for Disease Resistance Screening Increases Seed Yield of Container‐Grown Plants

Maas¹,

Dashiell²,

Melouk³

2006

Crop Science

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Host plant resistance is generally included as a means of mitigating production losses in peanut (Arachis hypogaea L.). Testing methods which do not impact yield are of particular value in the development of cultivars. The objectives of this research were to determine the viable seed yield of container-grown peanut plants and the impact of removing the apical dominant shoot on seed set, for use in disease testing. Two resistant cultivars, Tamspan 90 and Southwest Runner, and two susceptible cultivars, Okrun and Flavor Runner 458, were crossed in a diallel to produce F 1 seed. A total of 191 F 1 plants were evaluated in the greenhouse under two treatments, apical shoot removed or not removed, in 2003 to 2005. The mean seed set of the control group (apical shoot not removed) was 12 seed per plant compared with 15 seed per plant when the apical shoot was removed.

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Registration of ‘Southwest Runner’ Peanut

Cited by 20 publications

References 0 publications

Discovery and characterization of a molecular marker for Sclerotinia minor (Jagger) resistance in peanut

Discovery and characterization of a molecular marker for Sclerotinia minor (Jagger) resistance in peanut

Reaction of the Core Collection of Peanut Germplasm to Sclerotinia Blight and Pepper Spot1

Removal of Apical Dominant Shoot for Disease Resistance Screening Increases Seed Yield of Container‐Grown Plants

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