Genome-wide association study of the husk number and weight in maize (Zea mays L.)

Zhou, Guangfei; Hao, Dejun; Chen, Guoqing; Lu, Hailiang; Shi, Mei; Mao, Yuxiang; ZhengLiang, Zhang; Huang, Xiaolan; Xue, Li

doi:10.1007/s10681-016-1698-y

Cited by 23 publications

(24 citation statements)

References 35 publications

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“…The heritability of husk related traits in maize such as husk dry weight, husk width, husk thickness, etc. have been reported, and the heritability range is between 0.36 and 0.89 (Dan et al, 2001;Cui et al, 2016;Zhou et al, 2016). In this study, HTI showed a wide range of phenotypic variation and followed a normal distribution ( Supplementary Table S2 and Figure 1).…”

Section: Genetic Basis Of Htisupporting

confidence: 56%

“…Husk traits show broad variations that are subject to genetic regulation and have dissimilar characteristics depending on the genetic background (Zhou et al, 2016). The HN, husk fresh weight, husk dry weight, HL, HW, HT and the total area of the husk are mainly controlled by additive genetic effects (Ping et al, 2000;Dan et al, 2001;Gui-Hua et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Genome-Wide Association Study Dissects the Genetic Architecture of Maize Husk Tightness

Jiang

Zhang

et al. 2020

Front. Plant Sci.

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Section: Genetic Basis Of Htisupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Genome-Wide Association Study Dissects the Genetic Architecture of Maize Husk Tightness

Jiang

Zhang

et al. 2020

Front. Plant Sci.

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“…The incorporation of both K and PK matrices into a MLM has been successfully used in other species that exhibited significant population structure and relatedness (Gajardo et al, 2015;Zhou et al, 2016). Furthermore, the K model computational time is faster, and no additional steps like identifying population structure and PCs in the germplasm are required (Pasam et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Genome‐Wide Association Study of Resistance to Cassava Green Mite Pest and Related Traits in Cassava

et al. 2018

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Cassava green mite [CGM, Mononychellus tanajoa (Bondar)] is a dry‐season pest that usually feeds on the underside of young leaves causing leaf chlorosis, stunted growth, and root yield reduction by 80%. Since cassava (Manihot esculenta Crantz) leaves and roots serve as a primary staple food source, a decline in cassava yield can lead to household food, nutrition, and income insecurity. To evaluate the existence of CGM resistance alleles in the available germplasm, a diversity panel of 845 advanced breeding lines obtained from IITA, CIAT, and the National Root Crops Research Institute (NRCRI) were evaluated for CGM severity (CGMS), leaf pubescence (LP), leaf retention (LR), stay green, shoot tip compactness, and shoot tip size. A genome‐wide association mapping detected 35 single‐nucleotide polymorphisms (SNPs) markers significantly associated with CGMS, LP, and LR on chromosome 8. Colocalization of the most significant SNP associated with CGMS, LP, and LR on chromosome 8 is possibly an indication of pleiotropy or the presence of closely linked genes that regulate these traits. Seventeen candidate genes were found to be associated to CGM resistance. These candidate genes were subdivided into seven categories according to their protein structure namely, Zn finger, pentatricopeptide, MYB, MADS, homeodomain, trichome birefringence‐related protein, and ethylene‐responsive transcription factor genes. This study revealed significant loci associated with CGM, not previously reported, which together represent potential sources for the ongoing effort to develop multiple pest‐ and disease‐resistant cassava cultivars.

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“…The three traits are Husk Length (HL), Husk layer Number (HN), and Husk Width (HW), The study found 21 quantitative trait loci (QTL). Husk morphology varies widely among different maize inbred lines 10,[20][21][22] . In 2016, the first GWAS was conducted with 253 inbred lines and 3 K markers 22 and identified 24 markers associated with HN using the threshold of P < 0.001 without multiple test correction.…”

mentioning

confidence: 99%

Denser Markers and Advanced Statistical Method Identified More Genetic Loci Associated with Husk Traits in Maize

Cui

Zhang

Ruan

et al. 2020

Sci Rep

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The husk-the leaf-like outer covering of maize ear-has multiple functions, including protecting the ear from diseases infection and dehydration. In previous studies, we genotyped an association panel of 508 inbred lines genotyped with a total of ~550,000 SNPs (Illumina 50 K SNP Chip and RNA-seq). Genome-Wide Association Studies (GWAS) were conducted on four husk traits: husk length (HL), husk layer number (HN), husk thickness (HT), and husk width (HW). Minimal associations were identified and none of them passed the P-value threshold after a Bonferroni multiple-test correction using a single locus test in framework of mixed linear model. In this study, we doubled the number of SNPs (~1,250,000 in total) by adding GBS and 600 K SNP Chip. GWAS, performed with the recently developed multiple loci model (BLINK), revealed six genetic loci associated with HN and HT above the Bonferroni multiple-test threshold. Five candidate genes were identified based on the linkage disequilibrium with these loci, including GRMZM2G381691 and GRMZM2G012416. These two genes were up-regulation and down-regulation in all husk related tissues, respectively. GRMZM2G381691 associated with Ht encoded a CCT domain protein, which expressed higher in tropical than temperate maize. GRMZM2G012416 associated with HN encoded an Armadillo (ARM) repeat protein, which regulated GA signal pathway. these associated Snps and candidate genes paved a path to understand the genetic architecture of husk in maize. Husk is the outer membranous of fruits or seeds, carrying multiple functions such as protecting the ear from diseases infection and dehydration. Maize husk exists long before domestication ancestor teosinte in Mexico sometime between ten to five thousand years ago. Teosinte only has a handful kernels, while modern maize could have hundreds of kernels. Teosinte kernels are encased in a hard shell, which evolved to maize cob. The common feature is that kernels of both teosinte and maize are wrapped with husk. Although husk also produce carbohydrates through the process of photosynthesis 1 similar to leaves, the primary function is to provide living condition for kernels to grow, such as maintaining appropriate moisture. The secondary function is to protect kernels from attacks, such as from birds and pests damage, and pathogen infection 2-7. Compared with the foliar leaves that initiate from the shoot apical meristem (SAM), husks generate from the lateral meristem 8. The maize foliar leaves present a complete C 4 photosynthetic pathway. In contrast, although husks operate biologically as a C 4-like photosynthetic pathway, their CO 2 assimilation rate is inefficient and they exhibit a non-Kranz anatomy 1. Husk surface area is closely related to the amount of cell-wall components, such as hemicellulose and cellulose 9. Husks consist of multiple layers, typically ranging from 6 to 19 in inbreds and single-cross hybrids 10. Husk layer number was found to be highly related to tassel branch number 11 .

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Genome-wide association study of the husk number and weight in maize (Zea mays L.)

Cited by 23 publications

References 35 publications

Genome-Wide Association Study Dissects the Genetic Architecture of Maize Husk Tightness

Genome-Wide Association Study Dissects the Genetic Architecture of Maize Husk Tightness

Genome‐Wide Association Study of Resistance to Cassava Green Mite Pest and Related Traits in Cassava

Denser Markers and Advanced Statistical Method Identified More Genetic Loci Associated with Husk Traits in Maize

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