scholarly journals QTL Analysis of Five Silique-Related Traits in Brassica napus L. Across Multiple Environments

2021 ◽  
Vol 12 ◽  
Author(s):  
Xiaozhen Zhao ◽  
Kunjiang Yu ◽  
Chengke Pang ◽  
Xu Wu ◽  
Rui Shi ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Gene Networks ◽  
Reproductive Organ ◽  
High Yield ◽  
Potential Candidate ◽  
Seed Number ◽  
Brassica Napus L ◽  
Functional Annotations ◽  
Multiple Environments ◽  
Silique Length

As an important physiological and reproductive organ, the silique is a determining factor of seed yield and a breeding target trait in rapeseed (Brassica napus L.). Genetic studies of silique-related traits are helpful for rapeseed marker-assisted high-yield breeding. In this study, a recombinant inbred population containing 189 lines was used to perform a quantitative trait loci (QTLs) analysis for five silique-related traits in seven different environments. As a result, 120 consensus QTLs related to five silique-related traits were identified, including 23 for silique length, 25 for silique breadth, 29 for silique thickness, 22 for seed number per silique and 21 for silique volume, which covered all the chromosomes, except C5. Among them, 13 consensus QTLs, one, five, two, four and one for silique length, silique breadth, silique thickness, seed number per silique and silique volume, respectively, were repeatedly detected in multiple environments and explained 4.38–13.0% of the phenotypic variation. On the basis of the functional annotations of Arabidopsis homologous genes and previously reported silique-related genes, 12 potential candidate genes underlying these 13 QTLs were screened and found to be stable in multiple environments by analyzing the re-sequencing results of the two parental lines. These findings provide new insights into the gene networks affecting silique-related traits at the QTL level in rapeseed.

Identification of a major QTL for silique length and seed weight in oilseed rape (Brassica napus L.)

2012 ◽  
Vol 125 (2) ◽  
pp. 285-296 ◽  
Author(s):  
Pu Yang ◽  
Chang Shu ◽  
Lin Chen ◽  
Jinsong Xu ◽  
Jiangsheng Wu ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Seed Weight ◽  
Brassica Napus L ◽  
Silique Length ◽  
Major Qtl

QTL analysis of yield-related traits and their association with functional markers in Brassica napus L.

2007 ◽  
Vol 58 (8) ◽  
pp. 759 ◽  
Author(s):  
Yuanyuan Li ◽  
Jinxiong Shen ◽  
Tonghua Wang ◽  
Qingfang Chen ◽  
Xingguo Zhang ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Agronomic Traits ◽  
High Yield ◽  
Functional Markers ◽  
Multiple Traits ◽  
Brassica Napus L ◽  
Breeding Programs ◽  
F2 Population ◽  
Expressed Sequence ◽  
Simple Sequence

Yield is one of the most important traits in Brassica napus breeding programs. Quantitative trait loci (QTLs) for yield-related traits based on genetic mapping would help breeders to develop high-yield cultivars. In this study, a genetic linkage map of B. napus, containing 142 sequence-related amplified polymorphism (SRAP) markers, 163 functional markers, 160 simple sequence repeat (SSR) markers, and 117 amplified fragment length polymorphism (AFLP) markers, was constructed in an F2 population of 184 individuals resulting from the cross SI-1300 × Eagle. This map covered 2054.51 cM with an average marker interval of 3.53 cM. Subsequently, QTLs were detected for 12 yield-related traits in Wuhan and Jingmen. In total, 133 QTLs were identified, including 14 consistent ones across the 2 locations. Fifteen of 20 linkage groups (LGs) were found to have QTLs for the 12 traits investigated, and most of the QTLs were clustered, especially on LGs N2 and N7, where similar QTL positions were identified for multiple traits. Eight of 10 QTLs for yield per plant (YP) were also associated with number of seeds per silique (SS), number of siliques per plant (SP), and/or 1000-seed weight (SW). In addition, 45 functional markers involved in 39 expressed sequence tags (ESTs) were linked to the QTLs of 12 traits. The present results may serve as a valuable basis for further molecular dissection of agronomic traits in B. napus, and the markers related to QTLs may offer promising possible makers for marker assisted selection.

scholarly journals Early Maturing Rapeseed (Brassica Napus L.) F1 Hybrid Cultivar 'Joan' with High Yield and Oleic Acid Content

2021 ◽  
Vol 53 (3) ◽  
pp. 305-310
Author(s):  
Kwang-Soo Kim ◽  
Yong-Hwa Lee ◽  
Ji-Eun Lee ◽  
Young-Lok Cha ◽  
Da-Hee An ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Brassica Napus ◽  
Acid Content ◽  
High Yield ◽  
Oleic Acid Content ◽  
Brassica Napus L ◽  
F1 Hybrid ◽  
Early Maturing ◽  
Hybrid Cultivar

scholarly journals Genome Wide Analysis of Flowering Time Trait in Multiple Environments via High-Throughput Genotyping Technique in Brassica napus L.

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0119425 ◽  
Author(s):  
Lun Li ◽  
Yan Long ◽  
Libin Zhang ◽  
Jessica Dalton-Morgan ◽  
Jacqueline Batley ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Flowering Time ◽  
High Throughput ◽  
Brassica Napus L ◽  
Genome Wide Analysis ◽  
Genome Wide ◽  
Multiple Environments

scholarly journals INTRA-PLANT VARIATION IN NUMBER OF SEEDS PER POD AND SEED WEIGHT IN BRASSICA NAPUS ’TOWER’

1979 ◽  
Vol 59 (4) ◽  
pp. 959-962 ◽  
Author(s):  
JOHN M. CLARKE
Keyword(s):  
Brassica Napus ◽  
Seed Weight ◽  
Field Trials ◽  
Lower Branch ◽  
Seed Number ◽  
Brassica Napus L ◽  
Plant Variation ◽  
Developing Seeds ◽  
General Decline ◽  
Number Of Seeds

Field trials were conducted at Saskatoon in 1976, and at Swift Current in 1977, to investigate intra-plant variation in number of seeds per pod and seed weight in Brassica napus L. ’Tower’. Number of pods was greatest on the main raceme, least on the lowest branch. Seed number per pod was also highest on the main raceme, as was seed weight. In 1976, number of seeds per pod and seed weight were higher in pods from the lower half of the main raceme than from those on the upper half. A study of the trends in number of seeds per pod between the end of flowering and maturity revealed a general decline in number of seeds per pod and an increase in the number of aborted seeds at the lower branch positions. At the end of flowering, pods from all branch positions had equal numbers of developing seeds.

scholarly journals GENETIC DIVERSITY OF RAPESEED (Brassica napus L.) GENOTYPES IN BANGLADESH

2017 ◽  
Vol 30 (2) ◽  
pp. 29-34
Author(s):  
S. D. S. D. Joya ◽  
A. K. M. Shamsuddin ◽  
U. K. Nath
Keyword(s):  
Genetic Diversity ◽  
Brassica Napus ◽  
Harvest Index ◽  
High Yield ◽  
Brassica Napus L ◽  
Large Size ◽  
Parental Material ◽  
Number Of Seeds ◽  
High Seed Yield ◽  
Selection Of

Genetic diversity in thirty eight traditional rapeseed genotypes was studied under favorable condition through Mahalanobis D2 statistic for yield and yield contributing characters. The genotypes were grouped into five clusters. The inter-cluster distances were higher than intracluster distances indicating wider genetic diversity among the clusters. The intra-cluster distances were lower in all the cases reflecting homogeneity of the genotypes within the clusters. Among the different cluster the genotypes of the cluster IV, III and I included were taller plant. The genotypes in the cluster III and IV had large size raceme. The genotypes in the cluster IV, III and V exhibited comparatively higher number of siliqua per raceme. Longer siliqua was noticed for the genotypes in the cluster III, IV and I. Higher number of seeds per siliqua noticed in clusters I, II and III. The genotypes of the cluster I and II produced bold size seed. The genotypes in the cluster V and I had high harvest index. The genotypes of the cluster III and I produced high seed yield per plant. Among the different cluster, the cluster III included the genotypes which had high yield, higher number of seeds per siliqua, longer siliqua, siliqua number per raceme and high plant height. Moreover these cluster displayed wide divergence with the genotypes of cluster V. The genotypes of the cluster V had the highest harvest index therefore selection of the parental material for crossing program for improvement of yield in rapeseed is suggested from these two clusters.

scholarly journals Groundwater Table Effects on the Yield, Growth, and Water Use of Canola (Brassica napus L.) Plant

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1730 ◽  
Author(s):  
Hakan Kadioglu ◽  
Harlene Hatterman-Valenti ◽  
Xinhua Jia ◽  
Xuefeng Chu ◽  
Hakan Aslan ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Water Use ◽  
Water Table ◽  
Shallow Groundwater ◽  
Growth And Yield ◽  
High Yield ◽  
Brassica Napus L ◽  
Yield Parameters ◽  
Plant Water Use ◽  
Optimum Depth

Lysimeter experiments were conducted under greenhouse conditions to investigate canola (Brassica napus L.) plant water use, growth, and yield parameters for three different water table depths of 30, 60, and 90 cm. Additionally, control experiments were conducted, and only irrigation was applied to these lysimeters without water table limitations. The canola plant’s tolerance level to shallow groundwater was determined. Results showed that groundwater contributions to canola plant for the treatments at 30, 60, and 90 cm water table depths were 97%, 71%, and 68%, respectively, while the average grain yields of canola were 4.5, 5.3, and 6.3 gr, respectively. These results demonstrate that a 90 cm water table depth is the optimum depth for canola plants to produce a high yield with the least amount of water utilization.

Plant density response and optimum crop densities for canola (Brassica napus L.) in Western Australia

2016 ◽  
Vol 67 (4) ◽  
pp. 397 ◽  
Author(s):  
R. J. French ◽  
M. Seymour ◽  
R. S. Malik
Keyword(s):  
Brassica Napus ◽  
Western Australia ◽  
Maximum Yield ◽  
Yield Potential ◽  
High Yield ◽  
Yield Response ◽  
Asymptotic Model ◽  
Brassica Napus L ◽  
Optimum Density ◽  
Crop Density

In 24 experiments conducted across a range of agricultural environments in Western Australia between 2010 and 2014 canola (Brassica napus L.) grain yield response to crop density was adequately described by an asymptotic model (where yield approaches but never quite reaches a ceiling at very high density) in 101 out of 112 individual responses; in the other 11 yield reached a maximum and declined slightly at higher densities. Seed oil was more likely to increase than decrease with increasing density but the effect was always small; less than 1% oil over the range of densities tested. Increasing density also suppressed annual ryegrass (Lolium rigidum (L.) Gaud.) head numbers in six experiments where it was measured, especially at densities below 20 plants/m². Economic optimum densities ranged from 7 to 180 plants/m², with a median of 32.2. Mean optima in low and medium rainfall zones (growing season rainfall <300 mm) were about 25, 30, and 75 plants/m² respectively for glyphosate-tolerant (Roundup Ready), hybrid triazine-tolerant (TT), and open-pollinated TT cultivars, assuming open-pollinated TT cultivars were grown from farm-saved seed. There was little difference between optimum densities for hybrid and open-pollinated glyphosate-tolerant cultivars, and optima in the high rainfall zone were about 10 plants/m² higher than in low and medium rainfall zones. Yield at optimum density was greater than 90% of maximum yield in 74% of cases. The economic penalty for not achieving the optimum density with hybrids was usually small if the deviation was less than 10 plants/m², and with open-pollinated TT cultivars was small even 50-60 plants/m² below the optimum. The penalty was usually greater for deviations below than above the optimum in medium and high yield potential environments (yield potential >1000 kg/ha). Predicted optima were more sensitive to seed cost and field establishment (the proportion of viable seeds that become established) than grain price or seed size over the range of values expected in Western Australian agriculture. Field establishment varied from 0.3 to 1 and was higher at low target densities and for hybrid compared with open-pollinated cultivars, with a median of 0.585 at a target density of 40 plants/m². We identified improving field establishment of canola as an important research priority.

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