Breeding Tropical Vegetable Corns

Brewbaker, J. L.; Martin, Ian

doi:10.1002/9781119107743.ch04

Cited by 4 publications

(2 citation statements)

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“…Far less is known about the genetic basis of MCMV tolerance in maize. Screens of tropical maize inbred lines for MCMV tolerance found that 47 of 103 lines tested were tolerant of MCMV infection (i.e., they developed no or few symptoms) (116). However, the high degree of MLN susceptibility of African maize germplasm suggests that tolerance is not broadly distributed.…”

Section: Tolerancementioning

confidence: 99%

Maize Lethal Necrosis: An Emerging, Synergistic Viral Disease

2018

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Maize lethal necrosis (MLN) is a disease of maize caused by coinfection of maize with maize chlorotic mottle virus (MCMV) and one of several viruses from the Potyviridae, such as sugarcane mosaic virus, maize dwarf mosaic virus, Johnsongrass mosaic virus or wheat streak mosaic virus. The coinfecting viruses act synergistically to result in frequent plant death or severely reduce or negligible yield. Over the past eight years, MLN has emerged in sub-Saharan East Africa, Southeast Asia, and South America, with large impacts on smallholder farmers. Factors associated with MLN emergence include multiple maize crops per year, the presence of maize thrips ( Frankliniella williamsi), and highly susceptible maize crops. Soil and seed transmission of MCMV may also play significant roles in development and perpetuation of MLN epidemics. Containment and control of MLN will likely require a multipronged approach, and more research is needed to identify and develop the best measures.

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Section: Tolerancementioning

confidence: 99%

Maize Lethal Necrosis: An Emerging, Synergistic Viral Disease

2018

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“…There are at least nine alleles of waxy1 ( wx‐D7 , wx‐D10 , wx‐Cin4 , wx‐124 , wx‐Reina , wx‐Xuanwei , wx‐PIF/Harbinger , wx‐hAT , and wx‐Elote2 ), which are mutations in the coding or promotor regions of the Waxy1 gene located on chromosome nine (Wu et al., 2022). The wx1 mutation results in endosperm starch that is 100% amylopectin, while WT corn with functional alleles in the starch synthesis pathway is approximately 75% amylopectin and 25% amylose (Brewbaker & Martin, 2015; Fergason, 1994).…”

Section: Introductionmentioning

confidence: 99%

Genetic variation for endosperm carbohydrates and total soluble solids in shrunken2, sugary1, waxy1, and wild‐type near‐isogenic corn lines across three harvest dates

Wilson,

Fiore,

McCluskey

et al. 2024

Crop Science

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Sweet corn (Zea mays L.) cultivars must meet stringent quality standards to be accepted in the marketplace. Breeding for eating‐quality traits, such as sweetness, typically involves taste ratings or quantification of carbohydrate content. Total soluble solids (TSS) content is used as a proxy for sweetness in many fruit crops. Using a diallel of near‐isogenic corn lines for sugary1, shrunken2, waxy1, and wild‐type (WT) endosperm types, a combining ability analysis for carbohydrate traits and TSS content determined the relationship of these traits over three harvest dates. Variation existed for total sugar, sucrose, glucose, fructose, total polysaccharides, and starch content within and across endosperm types and harvest dates, but strong correlations with TSS content were present only when assessed across all endosperm types. Strong similarities existed among WT, waxy1, and sugary1 near‐isogenic lines for general combining ability for carbohydrate traits, while shrunken2 near‐isogenic lines had different desirable combiners. Line C40 was a desirable general combiner for carbohydrate traits among WT, waxy1, and sugary1 endosperm types, while Ia5125, P39, and Ia453 were desirable general combiners for shrunken2 endosperm. This experiment also determined that TSS content is not a useful trait in sweet corn breeding for quality traits.

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Maize lethal necrosis

Oduor¹

2022

CABI Compendium

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Breeding Tropical Vegetable Corns

Cited by 4 publications

References 50 publications

Maize Lethal Necrosis: An Emerging, Synergistic Viral Disease

Maize Lethal Necrosis: An Emerging, Synergistic Viral Disease

Genetic variation for endosperm carbohydrates and total soluble solids in shrunken2, sugary1, waxy1, and wild‐type near‐isogenic corn lines across three harvest dates

Maize lethal necrosis

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