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Genetic Associations of Sugarcane Mosaic Virus Resistance and Endosperm Carbohydrate Composition in Sweet Corn (Zea mays).

Record Type:	Electronic resources : Monograph/item
Title/Author:	Genetic Associations of Sugarcane Mosaic Virus Resistance and Endosperm Carbohydrate Composition in Sweet Corn (Zea mays)./
Author:	Hislop, Lillian M.
Description:	1 online resource (272 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 83-08, Section: B.
Contained By:	Dissertations Abstracts International83-08B.
Subject:	Agronomy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28965503click for full text (PQDT)
ISBN:	9798780632603

Genetic Associations of Sugarcane Mosaic Virus Resistance and Endosperm Carbohydrate Composition in Sweet Corn (Zea mays).
Hislop, Lillian M.

Genetic Associations of Sugarcane Mosaic Virus Resistance and Endosperm Carbohydrate Composition in Sweet Corn (Zea mays). - 1 online resource (272 pages)

Source: Dissertations Abstracts International, Volume: 83-08, Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2022.

Includes bibliographical references

Broader Relevance: The purpose of this research is to advance the scientific knowledge of sweet corn (Zea mays) genetics for breeders, growers, and consumers. Finer control of carbohydrates in sweet corn would lead to products that are preferable to consumers and contribute to lessening food waste. The wider incorporation of disease resistance in sweet corn means better yields and product quality. Genetic Analysis of Carbohydrates within Sweet Corn: Sweetness, and texture of sweet corn kernels are the most important traits for eating quality. This study investigates the variation and genetic associations of seven endosperm carbohydrates within the largest and most diverse sweet corn diversity panel to date. Predicted kernel carbohydrate composition was generated through high-throughput near-infrared spectroscopy. Two-stage genome-wide association studies (GWAS) were conducted with 77,414 markers on the carbohydrate measurements. We found that carbohydrate content varies widely across the panel and endosperm mutation groups varied significantly for most traits. Genotype was the main source of variance from all factors in the mixed linear model for all phenotypes (52%-73%). Association study found 373 significant markers between the seven carbohydrate traits in addition to the major endosperm mutants shrunken2 and sugary1. The large number of small effect size loci indicated that carbohydrates should be amenable to breeding through genomic prediction. Resistance to Sugar Cane Mosaic Virus: Sugarcane mosaic virus (SCMV) is a ssRNA virus that negatively impacts yield in Zea mays worldwide. The goal of this study was to identify sweet corn inbreds that demonstrate resistance to SCMV, confirm the presence of genomic regions previously identified associated with resistance, and identify other resistant loci in sweet corn. Eight plants from each of 563 primarily sweet corn inbred lines were tested for SCMV resistance. A GWAS was conducted to identify loci associated with SCMV resistance. Forty-six of the inbreds were found to be resistant to SCMV 10 days after inoculation. The Scm1 locus was confirmed with the presence of two significant markers on chromosome 6 (P = 2.5 x 10-8 and 1.6 x 10-8) downstream of the Scm1 gene. This research has increased information on publicly available SCMV resistant germplasm useful to future breeding projects.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798780632603Subjects--Topical Terms:

2122783
Agronomy.
Subjects--Index Terms:

GWASIndex Terms--Genre/Form:

542853
Electronic books.

Genetic Associations of Sugarcane Mosaic Virus Resistance and Endosperm Carbohydrate Composition in Sweet Corn (Zea mays).
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520 $a Broader Relevance: The purpose of this research is to advance the scientific knowledge of sweet corn (Zea mays) genetics for breeders, growers, and consumers. Finer control of carbohydrates in sweet corn would lead to products that are preferable to consumers and contribute to lessening food waste. The wider incorporation of disease resistance in sweet corn means better yields and product quality. Genetic Analysis of Carbohydrates within Sweet Corn: Sweetness, and texture of sweet corn kernels are the most important traits for eating quality. This study investigates the variation and genetic associations of seven endosperm carbohydrates within the largest and most diverse sweet corn diversity panel to date. Predicted kernel carbohydrate composition was generated through high-throughput near-infrared spectroscopy. Two-stage genome-wide association studies (GWAS) were conducted with 77,414 markers on the carbohydrate measurements. We found that carbohydrate content varies widely across the panel and endosperm mutation groups varied significantly for most traits. Genotype was the main source of variance from all factors in the mixed linear model for all phenotypes (52%-73%). Association study found 373 significant markers between the seven carbohydrate traits in addition to the major endosperm mutants shrunken2 and sugary1. The large number of small effect size loci indicated that carbohydrates should be amenable to breeding through genomic prediction. Resistance to Sugar Cane Mosaic Virus: Sugarcane mosaic virus (SCMV) is a ssRNA virus that negatively impacts yield in Zea mays worldwide. The goal of this study was to identify sweet corn inbreds that demonstrate resistance to SCMV, confirm the presence of genomic regions previously identified associated with resistance, and identify other resistant loci in sweet corn. Eight plants from each of 563 primarily sweet corn inbred lines were tested for SCMV resistance. A GWAS was conducted to identify loci associated with SCMV resistance. Forty-six of the inbreds were found to be resistant to SCMV 10 days after inoculation. The Scm1 locus was confirmed with the presence of two significant markers on chromosome 6 (P = 2.5 x 10-8 and 1.6 x 10-8) downstream of the Scm1 gene. This research has increased information on publicly available SCMV resistant germplasm useful to future breeding projects.
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