The Use of Endosperm Genes for Sweet Corn Improvement

Boyer, Charles D.; Shannon, Jack C.

doi:10.1002/9781118060988.ch5

Cited by 30 publications

(38 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Carbohydrate compositions and physiological process during seed development are dependent on genes controlling endosperm characters [25]. In this study, the inbred lines with shrunken gene (sh2) had intermediate starch content similar to those of the inbred lines with brittle gene (bt) and waxy (wx) gene and shrunken gene and waxy gene.…”

Section: Weights Of Pericarp Embryo and Endosperm Total Sugar Contmentioning

confidence: 74%

Seed Germination in Relation to Total Sugar and Starch in Endosperm Mutant of Sweet Corn Genotypes

et al. 2018

View full text Add to dashboard Cite

The use of combinations of two or more genes controlling carbohydrate characters of corn is an attractive way to improve table quality of sweet corn. Poor seed quality of the inbred lines hinders the progress of this strategy for hybrid seed production. The objective of this study was to evaluate sweet corn inbred lines with combinations of double and triple recessive genes for germination percentage, seed vigor, total sugar content, and starch content. Eleven sweet corn genotypes including seven inbred lines (F6 generation) with different combinations of genes controlling carbohydrate characters and four F1 hybrids were used. The germination experiment was conducted under standard test between papers (BP) and accelerated aging (AA) test. The data were recorded for germination percentage, germination speed, normal and abnormal seedling, seedling length, and seedling dry weight. The seeds were analyzed for total sugar and starch content in endosperm at maturity stage. The results showed that single recessive genotype (sh2sh2) had high germination percentage and seedling vigor. The combinations of bt or sh2 gene with wx gene resulted in low germination percentage and poor seedling vigor. However, combinations of triple recessive genes (btbt sh2sh2 wxwx) had good germination in BP test but they performed poorly in AA test.

show abstract

Section: Weights Of Pericarp Embryo and Endosperm Total Sugar Contmentioning

confidence: 74%

Seed Germination in Relation to Total Sugar and Starch in Endosperm Mutant of Sweet Corn Genotypes

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The main characteristic of sweet corn is that it has genes whose expression alters the grain composition (Creech, 1965). These genes block the conversion of sugars to starch in the endosperm resulting in the accumulation of high sugar content in the grains in detriment of the starch (Boyer and Shannon, 1984). This characteristic adds value to the product, which has been gaining space and demand is growing in Brazil (Barbieri et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Effect of sowing time on the growth and yield of sweet corn (Zea mays L.) cultivated during fall-winter period in Subtropical climate

Franco¹,

Filho²,

Scapim³

et al. 2016

Aust J Crop Sci

View full text Add to dashboard Cite

The aims of the study were to investigate the effect of sowing time on the phenotypic response of sweet corn hybrids cultivated during the fall-winter period, with supplementary irrigation, in Northwest Region of Paraná State, where has a Subtropical climate, without a specific dry season. The treatments consisted of the combination of four sowing dates (02/18; 03/04; 03/18; 04/01) and two commercial sweet corn hybrids (Tropical Plus and RB6324) in two years (2011 and 2012). The characteristics assessed were growth, production component, phenological cycle and accumulated thermal sum. The sweet corn plant growth was limited by delay in the sowing time that negatively affected the production components. The postponement of sowing time did not influence the accumulated thermal sum, although the number of days to harvest of the plants sown on February 18 th and April 4 th were, respectively, 93 and 120 days. The hybrid RB6324 presented the best productive performance and the second half of February was the preferential time for sowing sweet corn in the fall-winter period in the Northwest Region of Paraná State, Brazil.

show abstract

“…Samples collected 45 DAP were placed into a labeled mesh bag and dried at 70°C for 7 d. Kernels were removed from the ears then bulked into one sample. Any assay of kernel homogenates for sugars, starch, or enzyme activity represents the average content of the particular population of cells at the time of harvest (Boyer and Shannon, 1984). These samples were lyophilized to remove remaining moisture.…”

Section: Carbohydrate Analysismentioning

confidence: 99%

Endosperm Carbohydrate Composition and Kernel Characteristics of shrunken2‐intermediate (sh2‐i/sh2‐i Su1/Su1) and shrunken2‐intermediate–sugary1‐reference (sh2‐i/sh2‐i su1‐r/su1‐r) in Sweet Corn

Dodson‐Swenson¹,

Tracy

2015

Crop Science

View full text Add to dashboard Cite

The Shrunken2 (Sh2) gene in maize (Zea mays L.) codes for ADP‐glucose pyrophosphorylase. Corn homozygous for the shrunken2‐reference (sh2‐r) allele does not produce ADP‐glucose pyrophosphorylase, resulting in greatly reduced starch production and increased sugar in the endosperm. The shrunken2‐intermediate (sh2‐i) allele produces some enzyme and more starch than sh2‐r. The sugary1‐reference (su1‐r) allele results in endosperm with large amounts of water‐soluble polysaccharide (WSP), which gives sweet corn good mouth feel. The combination of endosperm WSP and sugar content determines sweet corn quality. We tested the hypothesis that double mutant sh2‐i/sh2‐i su1‐r/su1‐r results in increased amounts of endosperm WSP and sugar than sh2‐r/sh2‐r Su1/Su1, Sh2‐r/Sh2‐r su1‐r/su1‐r, or sh2‐r/sh2‐r su1‐r/su1‐r. Carbohydrate content was measured in kernels of near‐isogenic inbreds and hybrids of sh2‐i and sh2‐r in Su1 and su1‐r. The lines and hybrids were grown in field trials in 2009 and 2010. Carbohydrate content was determined using enzymatic procedures and quantified with a spectrophotometer. The WSP content in the double mutant sh2‐i su1‐r was greater than in sh2‐r and sh2‐r su1‐r. Sugar content in the double mutant sh2‐i su1‐r was greater than in su1‐r or sh2‐i. The WSP/starch ratio is an important determinant of mouth feel or texture. The sh2‐i/sh2‐i su1‐r/su1‐r hybrids had quality factors that exceed both sh2‐r and su1‐r commercial hybrids.

show abstract

The Use of Endosperm Genes for Sweet Corn Improvement

Cited by 30 publications

References 65 publications

Seed Germination in Relation to Total Sugar and Starch in Endosperm Mutant of Sweet Corn Genotypes

Seed Germination in Relation to Total Sugar and Starch in Endosperm Mutant of Sweet Corn Genotypes

Effect of sowing time on the growth and yield of sweet corn (Zea mays L.) cultivated during fall-winter period in Subtropical climate

Endosperm Carbohydrate Composition and Kernel Characteristics of shrunken2‐intermediate (sh2‐i/sh2‐i Su1/Su1) and shrunken2‐intermediate–sugary1‐reference (sh2‐i/sh2‐i su1‐r/su1‐r) in Sweet Corn

Contact Info

Product

Resources

About