Identification of a large-effect QTL associated with kernel discoloration in barley

The criteria of wheat quality are as varied as their different uses. Wheat, which is suitable for a particular use / product, may have certain characters that make it entirely unsatisfactory for other purposes. The storage fungi damage the grains in several ways; they reduce the germinability, produce undesirable odor and kernel discoloration, decrease the food value and also produce toxins injurious to the health of consumers. The sub-epidermal mycoflora of stored wheat grains predominantly consisted of ubiquitous mould genera Aspergillus, Alternaria and Penicillium possibly because of their omnipresence, capacity to grow on all possible substrates and a wide range of temperature and humidity. The most frequent species observed in the stored wheat grains of Aspergillus were A. niger and A. fumigates, Alternaria alternata and Pencillium citrinum. Among these the frequency of Alternaria alternata was highest which has the capacity to produce mycotoxin which can contaminate and cause spoilage. The grain losses found in quantity and quality; can be in the form of depletion in seed viability, hardness, color, size and shape, grain weight and various biochemical parameters viz., protein, carbohydrate and vitamins under post harvest storages. Key words: wheat; post-harvest; storage; sub-epidermal fungi and spoilage. Nepal Journal of Biotechnology. Jan. 2011, Vol. 1, No. 1 : 9-13

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Post-harvest kernel discoloration and fungi activity in long-grain hybrid, pureline and medium-grain rice cultivars as influenced by storage environment and antifungal treatment

Journal of Stored Products Research ◽

10.1016/j.jspr.2019.02.002 ◽

2019 ◽

Vol 81 ◽

pp. 91-99 ◽

Cited By ~ 5

Author(s):

Z. Mohammadi Shad ◽

G.G. Atungulu

Keyword(s):

Antifungal Treatment ◽

Rice Cultivars ◽

Post Harvest ◽

Kernel Discoloration

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Biochemical changes associated with electron beam irradiation of rice and links to kernel discoloration during storage

Cereal Chemistry ◽

10.1002/cche.10183 ◽

2019 ◽

Vol 96 (5) ◽

pp. 824-835 ◽

Cited By ~ 4

Author(s):

Zeinab Mohammadi Shad ◽

Emiel Steen ◽

Frank Devlieghere ◽

Andy Mauromoustakos ◽

Griffiths G. Atungulu

Keyword(s):

Electron Beam ◽

Electron Beam Irradiation ◽

Biochemical Changes ◽

Beam Irradiation ◽

Kernel Discoloration

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Quantitative trait loci controlling kernel discoloration in barley (Hordeum vulgare L.)

Australian Journal of Agricultural Research ◽

10.1071/ar03002 ◽

2003 ◽

Vol 54 (12) ◽

pp. 1251 ◽

Cited By ~ 15

Author(s):

C. D. Li ◽

R. C. M. Lance ◽

H. M. Collins ◽

A. Tarr ◽

S. Roumeliotis ◽

...

Keyword(s):

Quantitative Trait Loci ◽

Phenotypic Variation ◽

Quantitative Trait ◽

Marker Assisted Selection ◽

Major Gene ◽

Heading Date ◽

Major Qtls ◽

Trait Loci ◽

Selection For ◽

Kernel Discoloration

Barley kernel discoloration (KD) leads to substantial annual loss in value through downgrading and discounting of malting barley. KD is a difficult trait to introgress into elite varieties as it is controlled by multiple genes and strongly influenced by environment and maturity. As the first step towards marker assisted selection for KD tolerance, we mapped quantitative trait loci (QTLs) controlling KD measured by grain brightness [Minolta L; (Min L)], redness (Min a), and yellowness (Min b) in 7 barley populations. One to 3 QTLs were detected for grain brightness in various populations, and one QTL could account for 5–31% of the phenotypic variation. The QTL located around the centromere region of chromosome 2H was consistently detected in 6 of the 7 populations, explaining up to 28% of the phenotypic variation. In addition, QTLs for grain brightness were most frequently identified on chromosomes 3H and 7H in various populations. Australian varieties Galleon, Chebec, and Sloop contribute an allele to increase grain brightness on chromosome 7H in 3 different populations. A major gene effect was detected for grain redness. One QTL on chromosome 4H explained 54% of the phenotypic variation in the Sloop/Halcyon population, and was associated with the blue aleurone trait. A second QTL was detected on the long arm of chromosome 2H in 3 populations, accounting for 23–47% of the phenotypic variation. The major QTLs for grain yellowness were mapped on chromosomes 2H and 5H. There were strong associations between the QTLs for heading date, grain brightness, and yellowness. The molecular markers linked with the major QTLs should be useful for marker assisted selection for KD.

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