History, Genetics, and Breeding of Supersweet<i>(shrunken2)</i>Sweet Corn

Tracy, William F.

doi:10.1002/9780470650073.ch7

Cited by 34 publications

(36 citation statements)

References 97 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The combination of su1su1 Sh2sh2 is commonly used for hybrid seed production and the combinations of Su1su1 sh2sh2 or su1su1 Se1se1 are used in the temperate area. The modified hybrid with the combination of su1su1 Sh2sh2 has good germination similar to that with su1 and the hybrid has 25% of sh2 kernels in the ear [8]. The genotypes with combination of su1su1 Se1se1 have better eating quality than the genotypes with normal sugary (su1), and they also have better emergence and earlier vigor than the genotypes with normal sugary enhancer (se1se1) for cool areas [9].…”

Section: Introductionmentioning

confidence: 93%

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: Introductionmentioning

confidence: 93%

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

“…A. D. BARNOSKY maize strains may well be feasible. Given that molecular biology techniques are already capable of differentiating various varieties of Zea mays mays, and that those techniques can be used on fossil material up to several thousands of years old, it will probably be possible for palaeontologists of the future to recognize an unusual genetic mutation that produced supersweet corn (maize) around 1950 (Erwin 1951;Tracy 1997), and the genetically modified varieties of maize that humans began producing and marketing widely in 1998. Similar principles apply to defining lineage zones for other crop plants, such as wheat, rice and soy beans.…”

Section: Anthropocene Lineage Zonesmentioning

confidence: 99%

Palaeontological evidence for defining the Anthropocene

Barnosky

2013

View full text Add to dashboard Cite

Palaeontology formed the basis for defining most of the geological eras, periods, epochs and ages that are commonly recognized. By the same token, the Anthropocene can be defined by diverse palaeontological criteria, in accordance with commonly accepted biostratigraphic practice. The most useful Anthropocene biostratigraphic zones will be assemblage and abundance zones based on mixes of native and non-native species in both the marine and terrestrial realms, although lineage zones based on evolution of crop plants may also have utility. Also useful are human-produced trace fossils, which have resulted in prominent biohorizons that can mark the onset of the Anthropocene, especially the paved road system, widespread through terrestrial regions, and microplastics, ubiquitous in near-shore and deep-water marine sediments. Most of these palaeontological criteria support placing the Holocene-Anthropocene boundary near 1950. Continuation of current extinction rates would produce an extinction biohorizon on the scale of the Big Five mass extinctions within a few centuries, but enhanced conservation measures could prevent making mass extinction an Anthropocene signature. A grand challenge for palaeontologists now is to define Anthropocene biostratigraphic zones rigorously, not only as a necessary precursor to formalizing the epoch, but also to more fully understand how humans have restructured the biosphere.

show abstract

“…Sweet corn is considered as a corn-derived vegetable crop developed through recessive mutations having high sugar content at milky stage (Tracy 1997). The markets for sweet corn are now expanding and the demands are increasing due to urbanization and increase in purchasing power (Lertrat and Pulam 2007).…”

Section: Introductionmentioning

confidence: 99%