Inheritance of a Gene Conditioning Blotchy Root Color in Table Beet (Beta vulgaris L.)

Watson, Jeffery; Goldman, Irwin L.

doi:10.1093/oxfordjournals.jhered.a023154

Cited by 13 publications

(11 citation statements)

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“…Two of the crosses described in Watson and Goldman (1997) were similar to crosses 1 to 10 in this study. In the F 2 generation, both crosses had larger proportions of red roots than expected (0.766 and 0.770).…”

Section: Resultssupporting

confidence: 65%

“…In the F 2 generation, both crosses had larger proportions of red roots than expected (0.766 and 0.770). The chi-square goodness-of-fit statistics for these crosses were 2.69 and 2.95, respectively, with corresponding P values of 0.10 and 0.08 (note that the second chi-square value and the P values have been corrected from Table 1 in Watson and Goldman, 1997). While these results were not statistically significant, increased proportions of red-rooted progeny were also present in these two crosses.…”

Section: Resultsmentioning

confidence: 88%

“…The remaining four crosses discussed in Watson and Goldman (1997) used the reciprocal cross (red x blotchy) in the first generation, but used a backcross (to the blotchy parent) for the second generation. Chi-square goodness-of-fit tests of a 1:1 ratio were all nonsignificant (χ 2 = 0.14 to 1.09, P = 0.30 to 0.70).…”

Section: Resultsmentioning

confidence: 99%

“…Several possible explanations for the observed segregation distortion may be offered. The bl allele is responsible for blotchy patterning in the root of table beet plants, such that irregular sectors of betalain pigment are present in an unpigmented background (Watson and Goldman 1997). Betalain pigments likely have no demonstrable function in the roots of table beet plants and may simply be present due to human preference for (and selection of) root color during crop domestication.…”

Section: Resultsmentioning

confidence: 99%

“…In most cases, these distorted loci occur more frequently in populations derived from interspecific crosses. Watson and Goldman (1997) described a gene bl conditioning a blotchy phenotype (irregular sectors of red and white root color) in table beet (Beta vulgaris ssp. vulgaris).…”

mentioning

confidence: 99%

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Transmission Ratio Distortion Due to the bl Gene in Table Beet

Austin¹,

Goldman²

2001

jashs

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The bl gene conditions a blotchy phenotype (irregular sectors of red and white root color) in table beet (Beta vulgaris ssp. vulgaris). Segregation of the bl gene was found to be consistent with a single recessive gene, however, some evidence for a departure from a single gene model was observed when blbl plants were used as females. In this report, segregation of the bl gene was examined in greater detail in 10 F2 populations derived from crosses of red blotchy-rooted females (genotype blbl, denoted blotchy) with red-rooted males (BlBl, denoted red,), and 10 F2 populations derived from the reciprocal cross. In blbl × BlBl crosses, the proportion of red-rooted progeny was greater than 0.75 in seven of the crosses, and was significantly greater (P = 0.005) in three crosses. A test for heterogeneity was significant, indicating that the proportion of red-rooted progeny differed significantly in these 10 crosses. In BlBl × blbl crosses, the proportion of red-rooted progeny was <0.75 in seven of the crosses and there were no significant departures from the expected 3:1 ratio in any of the individual crosses. However, a pooled estimate of the segregation ratio showed a significant (P < 0.01) departure from the 3:1 ratio (pooled estimate = 0.71). These data demonstrate transmission ratio distortion at the bl locus when blbl plants are used as both females and males in matings with wild type plants, but the degree of distortion is greater when blbl plants are used as females. Ratio distortion in such crosses may be due to a variety of factors, including increased transmission of the bl gene through female or male gametes depending on the direction of the cross, reduced fitness of maternally derived blbl progeny, epigenetic phenomena, increased fitness of paternally derived blbl progeny, or linkage of the bl gene to viability genes.

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Section: Resultssupporting

confidence: 65%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Transmission Ratio Distortion Due to the bl Gene in Table Beet

Austin¹,

Goldman²

2001

jashs

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History and Breeding of Table Beet in the United States

Goldman¹,

Navazio²

2002

Plant Breeding Reviews

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Novel QTL associated with Rhizoctonia solani Kühn resistance identified in two table beet × sugar beet F_2:3 populations using a new table beet reference genome

et al. 2023

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The necrotrophic fungus Rhizoctonia solani Kühn is a major concern for table beet (Beta vulgaris L. ssp. vulgaris) producers across the United States causing upward of 75% losses in severe instances. Thus far, there have been minimal efforts to incorporate host resistance to R. solani in table beet germplasm. To investigate the genetic control of R. solani resistance in table beet, we developed two mapping populations. Parents of the two populations were a Rhizoctonia‐susceptible table beet inbred W357A and a resistant sugar beet germplasm FC709‐2 (sugar beet resistance population, SBRP) and a Rhizoctonia‐resistant table beet inbred W364B and a susceptible sugar beet inbred FC901/C817 (table beet resistance population, TBRP). In Spring 2020, F2:3 families were evaluated for response to artificial inoculation with R. solani AG 2‐2 IIIB isolate R1 in replicated greenhouse experiments. This work also represents the first use of the W357B table beet reference genome, utilized here to align genotyping‐by‐sequencing reads to identify polymorphic markers. Using interval linkage mapping, we identified one quantitative trait locus (QTL) in each of the two populations, each accounting for 30% of the phenotypic variation. The QTL in both the SBRP and TBRP were found on chromosome 2 and contained several putative resistance genes in annotations of the Beta vulgaris and Arabidopsis thaliana genomes. This is the first report of a QTL on chromosome 2 for resistance to R. solani in B. vulgaris ssp. vulgaris and the first identification of QTL for disease resistance in table beet. The newly developed table beet reference genome and markers identified in this study may be of value for marker‐assisted selection in breeding for resistance to R. solani in both sugar beet and table beet breeding programs.

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Inheritance of a Gene Conditioning Blotchy Root Color in Table Beet (Beta vulgaris L.)

Cited by 13 publications

References 0 publications

Transmission Ratio Distortion Due to the bl Gene in Table Beet

Transmission Ratio Distortion Due to the bl Gene in Table Beet

History and Breeding of Table Beet in the United States

Novel QTL associated with Rhizoctonia solani Kühn resistance identified in two table beet × sugar beet F_2:3 populations using a new table beet reference genome

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Inheritance of a Gene Conditioning Blotchy Root Color in Table Beet (Beta vulgaris L.)

Cited by 13 publications

References 0 publications

Transmission Ratio Distortion Due to the bl Gene in Table Beet

Transmission Ratio Distortion Due to the bl Gene in Table Beet

History and Breeding of Table Beet in the United States

Novel QTL associated with Rhizoctonia solani Kühn resistance identified in two table beet × sugar beet F2:3 populations using a new table beet reference genome

Contact Info

Product

Resources

About

Novel QTL associated with Rhizoctonia solani Kühn resistance identified in two table beet × sugar beet F_2:3 populations using a new table beet reference genome