Inheritance of seed coat color of Ethiopian mustard (Brassica carinata A. Braun)

2010 ◽  
Vol 90 (3) ◽  
pp. 279-281 ◽  
Author(s):  
M Rahman ◽  
M Tahir
Keyword(s):  
Seed Coat ◽  
Coat Color ◽  
Brassica Carinata ◽  
Seed Coat Color ◽  
Yellow Light ◽  
Ethiopian Mustard ◽  
Light Yellow ◽  
Inheritance Model ◽  
Pure Lines ◽  
Color Gene

The inheritance of seed coat color was investigated in Brassica carinata in F1, F2, F3 and backcross progenies of crosses between brown- and yellow-seeded pure lines. Seed coat color in B. carinata was not influenced by xenia effect. Segregation pattern followed a mono-genic incomplete dominance inheritance model The occurrence of yellow/light yellow-brown seed trait in B. carinata may be due to an interaction between brown seed coat color gene and dominant repressor (Rp) genes. Key words: Brassica carinata, inheritance, seed coat color, dominant repressor

scholarly journals Fine Mapping and Whole-Genome Resequencing Identify the Seed Coat Color Gene in Brassica rapa

PLoS ONE ◽  
2016 ◽  
Vol 11 (11) ◽  
pp. e0166464 ◽  
Author(s):  
Yanhua Wang ◽  
Lu Xiao ◽  
Shaomin Guo ◽  
Fengyun An ◽  
Dezhi Du
Keyword(s):  
Brassica Rapa ◽  
Fine Mapping ◽  
Seed Coat ◽  
Coat Color ◽  
Whole Genome ◽  
Seed Coat Color ◽  
Genome Resequencing ◽  
Whole Genome Resequencing ◽  
Coat Color Gene ◽  
Color Gene

Repression of seed coat pigmentation in Ethiopian mustard

1997 ◽  
Vol 77 (4) ◽  
pp. 501-505 ◽  
Author(s):  
A. Getinet ◽  
G. Rakow
Keyword(s):  
Seed Coat ◽  
Brassica Species ◽  
Brassica Carinata ◽  
Seed Colour ◽  
Pigment Synthesis ◽  
Yellow Seed ◽  
Repressor Gene ◽  
Colour Inheritance ◽  
Ethiopian Mustard ◽  
Light Yellow

The inheritance of seed colour in Brassica carinata A. Braun was investigated in backcross and F2 generations derived from two crosses between the brown seeded cultivar S-67 and two, true breeding, yellow seeded lines, PGRC/E 21164 and PGRC/E 21224 of the Plant Gene Resources Centre of Ethiopia. F1 seed was identical in colour to self-pollinated seed borne on the respective brown and yellow seeded parents indicating maternal control of seed colour in B. carinata. F1 plants of reciprocal crosses produced yellow seed that was somewhat darker than that of the yellow-seeded parent indicating incomplete dominance of yellow over brown. Backcross F1 plants, derived from the backcross to the brown parent, segregated brown and light yellow-brown/yellow seeded plants in a 1:1 ratio, while backcrosses to both yellow seeded parents produced only light yellow-brown/yellow seeded plants. The F2 generation segregated brown and light yellow-brown/yellow seeded plants in a 1:3 ratio. These results are in contrast to seed colour inheritance pattern observed in other Brassica species, where brown seed colour was fully or partially dominant over yellow. The apparent dominance of the absence of a gene product in yellow seed over its presence in brown seed, was explained by the presence of a dominant repressor gene (Rp) in yellow seed which inhibits the expression of seed coat pigment synthesis genes. The repressor gene is absent in brown seeded plants. The significance of this finding in relation to the development of yellow seeded lines in other Brassica species is discussed. Key words: Brassica carinata, seed colour inheritance, repressor

Generation and mapping of SCAR and CAPS markers linked to the seed coat color gene in Brassica napus using a genome-walking technique

Genome ◽  
2007 ◽  
Vol 50 (7) ◽  
pp. 611-618 ◽  
Author(s):  
Shushu Xiao ◽  
Jinsong Xu ◽  
Yuan Li ◽  
Lei Zhang ◽  
Shijun Shi ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Seed Coat ◽  
Coat Color ◽  
Aflp Markers ◽  
Seed Color ◽  
Seed Coat Color ◽  
A Genome ◽  
Reference Map ◽  
Coat Color Gene ◽  
Color Gene

The yellow seed coat trait in No. 2127-17, a resynthesized purely yellow Brassica napus line, is controlled by a single partially dominant gene, Y. A double-haploid population derived from the F1 of No. 2127-17 × ‘ZY821’ was used to map the seed coat color phenotype. A combination of AFLP analysis and bulked segregant analysis identified 18 AFLP markers linked to the seed coat color trait. The 18 AFLP markers were mapped to a chromosomal region of 37.0 cM with an average of 2.0 cM between adjacent markers. Two markers, AFLP-K and AFLP-H, bracketed the Y locus in an interval of 1.0 cM, such that each was 0.5 cM away from the Y locus. Two other markers, AFLP-A and AFLP-B, co-segregated with the seed color gene. For ease of use in breeding programs, these 4 most tightly linked AFLP markers were converted into reliable PCR-based markers. SCAR-K, which was derived from AFLP-K, was assigned to linkage group 9 (N9) of a B. napus reference map consisting of 150 commonly used SSR (simple sequence repeat) markers. Furthermore, 2 SSR markers (Na14-E08 and Na10-B07) linked to SCAR-K on the reference map were reversely mapped to the linkage map constructed in this study, and also showed linkage to the Y locus. These linked markers would be useful for the transfer of the dominant allele Y from No. 2127-17 to elite cultivars using a marker-assisted selection strategy and would accelerate the cloning of the seed coat color gene.

scholarly journals Genetic Mapping and Identification of the Candidate Gene for White Seed Coat in Cucurbita maxima

2021 ◽  
Vol 22 (6) ◽  
pp. 2972
Author(s):  
Yuzi Shi ◽  
Meng Zhang ◽  
Qin Shu ◽  
Wei Ma ◽  
Tingzhen Sun ◽  
...  
Keyword(s):  
Seed Coat ◽  
Molecular Breeding ◽  
Coat Color ◽  
Recessive Gene ◽  
Myb Transcription Factor ◽  
Cucurbita Maxima ◽  
Seed Coat Color ◽  
Rna Seq ◽  
Edible Seed ◽  
Segregating Population

Seed coat color is an important agronomic trait of edible seed pumpkin in Cucurbita maxima. In this study, the development pattern of seed coat was detected in yellow and white seed coat accessions Wuminglv and Agol. Genetic analysis suggested that a single recessive gene white seed coat (wsc) is involved in seed coat color regulation in Cucurbita maxima. An F2 segregating population including 2798 plants was used for fine mapping and a candidate region containing nine genes was identified. Analysis of 54 inbred accessions revealed four main Insertion/Deletion sites in the promoter of CmaCh15G005270 encoding an MYB transcription factor were co-segregated with the phenotype of seed coat color. RNA-seq analysis and qRT-PCR revealed that some genes involved in phenylpropanoid/flavonoid metabolism pathway displayed remarkable distinction in Wuminglv and Agol during the seed coat development. The flanking InDel marker S1548 was developed to predict the seed coat color in the MAS breeding with an accuracy of 100%. The results may provide valuable information for further studies in seed coat color formation and structure development in Cucurbitaceae crops and help the molecular breeding of Cucurbita maxima.

scholarly journals Explore the genetics of weedy traits using rice 3K database

2021 ◽  
Vol 62 (1) ◽  
Author(s):  
Yu-Lan Lin ◽  
Dong-Hong Wu ◽  
Cheng-Chieh Wu ◽  
Yung-Fen Huang
Keyword(s):  
Seed Coat ◽  
Coat Color ◽  
Rice Genome ◽  
Genome Project ◽  
Weedy Rice ◽  
Seed Coat Color ◽  
Allele Mining ◽  
Cultivated Rice ◽  
Population Structure Analysis ◽  
Public Data

Abstract Background Weedy rice, a conspecific weedy counterpart of the cultivated rice (Oryza sativa L.), has been problematic in rice-production area worldwide. Although we started to know about the origin of some weedy traits for some rice-growing regions, an overall assessment of weedy trait-related loci was not yet available. On the other hand, the advances in sequencing technologies, together with community efforts, have made publicly available a large amount of genomic data. Given the availability of public data and the need of “weedy” allele mining for a better management of weedy rice, the objective of the present study was to explore the genetic architecture of weedy traits based on publicly available data, mainly from the 3000 Rice Genome Project (3K-RGP). Results Based on the results of population structure analysis, we have selected 1378 individuals from four sub-populations (aus, indica, temperate japonica, tropical japonica) without admixed genomic composition for genome-wide association analysis (GWAS). Five traits were investigated: awn color, seed shattering, seed threshability, seed coat color, and seedling height. GWAS was conducted for each sub-population × trait combination and we have identified 66 population-specific trait-associated SNPs. Eleven significant SNPs fell into an annotated gene and four other SNPs were close to a putative candidate gene (± 25 kb). SNPs located in or close to Rc were particularly predictive of the occurrence of seed coat color and our results showed that different sub-populations required different SNPs for a better seed coat color prediction. We compared the data of 3K-RGP to a publicly available weedy rice dataset. The profile of allele frequency, phenotype-genotype segregation of target SNP, as well as GWAS results for the presence and absence of awns diverged between the two sets of data. Conclusions The genotype of trait-associated SNPs identified in this study, especially those located in or close to Rc, can be developed to diagnostic SNPs to trace the origin of weedy trait occurred in the field. The difference of results from the two publicly available datasets used in this study emphasized the importance of laboratory experiments to confirm the allele mining results based on publicly available data.

Harvest Loss and Seed Bank Longevity of Flax (Linum usitatissimum) Implications for Seed-Mediated Gene Flow

Weed Science ◽  
2011 ◽  
Vol 59 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Jody E. Dexter ◽  
Amit J. Jhala ◽  
Rong-Cai Yang ◽  
Melissa J. Hills ◽  
Randall J. Weselake ◽  
...  
Keyword(s):  
Gene Flow ◽  
Seed Coat ◽  
Seed Bank ◽  
Coat Color ◽  
Oilseed Crop ◽  
Seed Coat Color ◽  
Flax Seed ◽  
Seed Loss ◽  
Artificial Seed ◽  
Seed Mediated

Flax is a minor oilseed crop in Canada largely exported to the European Union for use as a source of industrial oil and feed ingredient. While flax could be genetically engineered (GE) to enhance nutritional value, the adoption of transgenic technologies threatens conventional flax market acceptability. Harvest seed loss of GE crops and the persistence of GE crop volunteers in the seed bank are major factors influencing transgene persistence. Ten commercial fields in Alberta, Canada, were sampled after harvesting conventional flax in 2006 and 2007, and flax seed density and viability were determined. Additionally, artificial seed banks were established at two locations in Alberta in 2005 and 2006 to quantify persistence of five conventional flax cultivars with variability in seed coat color (yellow or brown) and α-linolenic acid (ALA, 18:3cisΔ9,13,15) content (3 to 55%) at three soil depths (0, 3, or 10 cm). Harvest methods influenced seed loss and distribution, > 10-fold more seed was distributed beneath windrows than between them. Direct harvested fields had more uniform seed distribution but generally higher seed losses. The maximum yield loss was 44 kg ha−1or 2.3% of the estimated crop yield. Seed loss and the viability of flax seed were significantly influenced by year, presumably because weather conditions prior to harvest influenced the timing and type of harvest operations. In artificial seed bank studies, seed coat color or ALA content did not influence persistence. Flax seed viability rapidly declined in the year following burial with < 1% remaining midsummer in the year following burial but there were significant differences between years. In three of four locations, there was a trend of longer seed persistence at the deepest burial depth (10 cm). The current study predicts that seed-mediated gene flow may be a significant factor in transgene persistence and a source of adventitious presence.

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