Inheritance of Some Bloomless and Sparse‐bloom Mutants in Sorghum
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Peterson, G. C.; Suksayretrup, K.; Weibel, D. E.

doi:10.2135/cropsci1982.0011183x002200010014x

Cited by 28 publications

(19 citation statements)

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“…The mutations were also allelic with the bloomless mutant Txbml. Peterson et al (1982) designated this locus bml. The mutants bm-11, bm-15, and bm-21 contained mutations that were not allelic with each other or with bml.…”

Section: Plant Materialsmentioning

confidence: 99%

Chemically Induced Cuticle Mutation Affecting Epidermal Conductance to Water Vapor and Disease Susceptibility in Sorghum bicolor (L.) Moench

et al. 1994

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Analysis of Sorghum bicolor bloomless (bm) mutants with altered epicuticular wax (EW) structure uncovered a mutation affeding both EW and cuticle deposition. l h e cuticle of mutant bm-22 was about 60% thinner and approximately one-fifth the weight of the wild-type parent P954035 (Wl-P954035) cuticles. Reduced cuticle deposition was associated with increased epidermal conductance to water vapor. The reduction in EW and cuticle deposition increased susceptibility to the funga1 pathogen Exserohilum turcicum. Evidence suggests that this recessive mutation occurs at a single locus with pleiotropic effects. l h e independently occurring gene mutations of bm-2, bm-6, bm-22, and bm-33 are allelic. These chemically induced mutants had essentially identical EW strudure, water loss, and cuticle deposition. Furthermore, 138 Fz plants from a bm-22 x WT-P954035 backcross showed no recombination of these traits. This unique mutation in a near-isogenic background provides a useful biological system to examine plant cuticle biosynthesis, physiology, and function.EW provides the outermost bamer between plants and their environment. Previous studies have implicated EW layers in tolerance to various kinds of biotic and abiotic environmental stress (Eglinton and Hamilton, 1967; Thomas and Barber, 1974;Blum, 1975; Webster, 1977; Bengston et al., 1978;Jordan et al., 1984; El-Otmani et al., 1989;Jefferson et al., 1989;Percy and Baker, 1990; Stoner, 1990;Bergman et al., 1991). Near-isogenic mutants provide a model system for the dissection of biochemical (Koorneef et al., 1989; Somerville and Browse, 1991) and biophysical (Blum, 1975;Jordan et al., 1984; Saneoka and Ogata, 1987) under drought stress and disease pressure in southwestem Mexico suggested that mutants bm-2, bm-6, bm-22, and bm-33, making up an individual allelic group, were more susceptible to drought and more susceptible to leaf blight. Since individuals in this allelic group had EW structures and total EW load similar to other bm mutants that were not susceptible to drought and disease, we suspected that these responses were due to alterations in the cuticle proper. To test this hypothesis, cuticle ultrastructures and depositions on the wild-type and bm mutants were analyzed and then compared with water loss rates and disease resistance. Our results suggest that allelic mutants bm-2, bm-6, bm-22, and bm-33 possessa mutation affecting cuticle deposition. To our knowledge, a cuticle mutation in plants has not been previously reported. MATERIALS AND METHODS Plant MaterialThe mutagenesis program was initiated using two droughtresistant inbred lines of Sorghum bicolor (L.) Moench. These inbred lines, designated P954035 and P898012, were produced in the Purdue Sorghum Improvement Program (Dr. Gebisa Ejeta, Department of Agronomy). Seeds (Mo) were exposed to the chemical mutagens diethyl sulfate (J. T. Baker, Phillipsburg, NJ) or ethyl methanesulfate (Eastman Kodak Co., Rochester, NY). Seeds treated with diethyl sulfate were submerged in either a 5.7, 7.7, or 11.5 mM solut...

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Section: Plant Materialsmentioning

confidence: 99%

Chemically Induced Cuticle Mutation Affecting Epidermal Conductance to Water Vapor and Disease Susceptibility in Sorghum bicolor (L.) Moench

et al. 1994

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“…Genetic stocks for the sorghum maturity groups included in this collection were described by (Miller et al, 1968). The group of 16 bloomless mutants originating from Oklahoma was characterized by Peterson et al (1982) and registered by Weibel (1986a, 1986b). More recently, the first and only sorghum transposable element has been traced to the two calico lines (KFS1011 and KFS1020) collected from Sudan (Chopra et al, 2002; Carvalho et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Registration of a Diverse Collection of Sorghum Genetic Stocks

Xin

Burow

Woodfin

et al. 2012

J of Plant Registrations

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Genetic stock collections have played an important role in shaping breeding strategies in many crops. With the advance in genomics, they are now essential tools for identifying genes underlying important agronomic traits. The objective of this work is to formally register and document the release of historical sorghum [Sorghum bicolor (L.) Moench] genetic stocks originally collected and curated by the late USDA-ARS sorghum geneticist Keith Schertz. The seeds from the original collection were revitalized at the USDA-ARS Experiment Station at Lubbock, TX in 2004 and 2006, and evaluated for phenotypic variations in 2009. The collection consists of 507 lines and accessions (Reg. No. GS-144, PI 663217 through Reg.No. GS-650, PI 663723). This collection displays significant variation in growth, developmental, and agronomic traits, such as seedling vigor, leaf/vegetative organs, reproduction, maturity, height, and grain quality. Combined with advanced genomic tools, these genetic stocks are vital resources for elucidating the fundamental pathways that make sorghum and other related grasses unusually tolerant to drought and heat stress, have moderate to low requirements for fertilizer, and highly productive under diverse environmental conditions.

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“…Epicuticular wax mutants are known as bloomless mutants if there are no visible exudates present or as sparse-bloom mutants if a light covering of EW is present. Peters et al (2009) identified six cuticle proper alleles of the bloomless2 (bm2) locus (bm2-1 to bm2-6) and was able to show that the bm 2 mutant identified by Peterson et al (1982) is an allele of the bm2 locus. Besides epicuticular waxes, some sorghum bloomless mutants also have inhibited synthesis of the cuticle proper.…”

mentioning

confidence: 99%

“…These cuticle proper mutants have rapid leaf-water loss and high susceptibility to the fungal pathogen Exserohilum turcicum, which causes northern corn leaf blight ( Jenks et al, 1994). Peters et al (2009) identified six cuticle proper alleles of the bloomless2 (bm2) locus (bm2-1 to bm2-6) and was able to show that the bm 2 mutant identified by Peterson et al (1982) is an allele of the bm2 locus. Single recessive nuclear gene inheritance was identified for the mutants of the Bm2 locus (Peters et al, 2009).…”

mentioning

confidence: 99%

The Genes Bm2 and Blmc that Affect Epicuticular Wax Deposition in Sorghum are Allelic

et al. 2017

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Epicuticular waxes (EW) coat the aerial surfaces of the sorghum [Sorghum bicolor (L.) Moench] plant and have a role in the plant's resistance to abiotic and biotic stresses, such as drought, ultraviolet light, insects, and fungal pathogens. Mutants of the Bloomless2 (Bm2) locus, such as bm2‐3, lack visible EW and have inhibited synthesis of the cuticle. The sorghum mutant bloom‐cuticle (blmc) also lacks visible EW and has inhibited synthesis of the cuticle, as well as many other effects. In this study, an allelism test was performed, which revealed that blmc is an allele of the Bm2 locus and is hereby designated as bm2‐7. This finding allows the data that have been generated separately from each of these mutations to be merged. Thus, the results suggest that the Bm2 locus is on sorghum chromosome 10 and could have pleiotropic effects, including cuticle proper synthesis, leaf water retention, greenbug biotype C (Schizaphis graminum Rondani) susceptibility, and resistance to the fungal pathogen Exserohilum turcicum Pass., which causes northern corn leaf blight. Further examination of the Bm2 locus can be accomplished by the use of only one mutant line.

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Inheritance of Some Bloomless and Sparse‐bloom Mutants in Sorghum ¹

Cited by 28 publications

References 5 publications

Chemically Induced Cuticle Mutation Affecting Epidermal Conductance to Water Vapor and Disease Susceptibility in Sorghum bicolor (L.) Moench

Chemically Induced Cuticle Mutation Affecting Epidermal Conductance to Water Vapor and Disease Susceptibility in Sorghum bicolor (L.) Moench

Registration of a Diverse Collection of Sorghum Genetic Stocks

The Genes Bm2 and Blmc that Affect Epicuticular Wax Deposition in Sorghum are Allelic

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Inheritance of Some Bloomless and Sparse‐bloom Mutants in Sorghum 1

Cited by 28 publications

References 5 publications

Chemically Induced Cuticle Mutation Affecting Epidermal Conductance to Water Vapor and Disease Susceptibility in Sorghum bicolor (L.) Moench

Chemically Induced Cuticle Mutation Affecting Epidermal Conductance to Water Vapor and Disease Susceptibility in Sorghum bicolor (L.) Moench

Registration of a Diverse Collection of Sorghum Genetic Stocks

The Genes Bm2 and Blmc that Affect Epicuticular Wax Deposition in Sorghum are Allelic

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Inheritance of Some Bloomless and Sparse‐bloom Mutants in Sorghum ¹