scholarly journals Impact of high temperature on heterosis and general combining ability in spring canola (Brassica napus L.)

2018 ◽  
Vol 221 ◽  
pp. 61-70 ◽  
Author(s):  
C.B. Koscielny ◽  
S.W. Gardner ◽  
R.W. Duncan
Keyword(s):  
High Temperature ◽  
Brassica Napus ◽  
Combining Ability ◽  
General Combining Ability ◽  
Brassica Napus L ◽  
Spring Canola

Heterosis and combining ability estimates in spring-planted oilseed rape (Brassica napus L.)

1985 ◽  
Vol 27 (4) ◽  
pp. 472-478 ◽  
Author(s):  
I. Grant ◽  
W. D. Beversdorf
Keyword(s):  
Brassica Napus ◽  
Plant Height ◽  
Oilseed Rape ◽  
Seed Yield ◽  
Combining Ability ◽  
Seed Weight ◽  
General Combining Ability ◽  
Brassica Napus L ◽  
Lodging Resistance ◽  
Percent Protein

A 6 × 6 diallel cross was conducted in spring-planted oilseed rape (Brassica napus L.) in 1983 at Elora and Dundalk, Ontario. The F1 hybrids exhibited positive heterosis for seed yield, of up to 72%, over the higher-yielding parent in the hybrid crosses. Heterosis for 1000 seed weight, percent oil, plant height, and lodging resistance was nonsignificant; negative heterosis for percent protein was observed with some hybrids. Generally, the hybrids were intermediate to the parents in flowering date and physiological maturity. Specific combining ability was more important than general combining ability for seed yield, percent oil, percent protein, plant height (Dundalk), and lodging resistance (Elora); specific combining ability was as important as general combining ability for 1000 seed weight, physiological maturity, plant height (Elora), and lodging resistance (Dundalk). The cultivars 'Topas' and 'Regent' were the best general combiners for seed yield. The best specific combinations for seed yield heterosis, 'Westar' × 'Hanna', 'Regent' × 'Liné', and 'Regent' × 'D-1', exhibited average high-parent heterosis values of 50, 38, and 30%, respectively. The results demonstrated that considerable potential exists for producing high-yielding single-cross hybrids of oilseed rape. Commercial exploitation of this heterosis will depend on the successful development of suitable pollination control mechanisms.Key words: Brassica napus, oilseed rape, F1 hybrid, heterosis, combining ability.

scholarly journals Combining ability of the new CMS-lines of winter rapeseed (Brassica napus L.) bred at VNIIMK

2020 ◽  
Vol 4 (184) ◽  
pp. 18-23
Author(s):  
E.B. Bochraryova ◽  
◽  
Е.А. Strelnikov ◽  
L.А. Gorlova ◽  
V.V. Serdyuk ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Combining Ability ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Brassica Napus L ◽  
Winter Rapeseed

Combining ability (CA) of lines is one of the main criteria of estimation of the parental components of hybrids. There are existed the different crossing schemes for estimation of a combining ability. A method of top-cross is successfully used in a breeding practice. This method was used for estimation of a range of new CMS-lines of winter rapeseed perspective in breeding of simple interline hybrids. In our research we used six sterile lines on a base of CMS Ogura and six lines-restorers of fertility (testers). We obtained 36 test-hybrids for estimation of a combining ability of the lines. Positive combination of effects of the general combining ability (GCA) and variances of the specific combining ability (SCA), stable manifested in two years, we observed in two maternal lines 39712 and 40059. Hybrids with these lines had the higher average seed yield in two years of the research. These lines can be recommended for development of practically important hybrids of winter rapeseed. It is considered the testers possessing high GCA are promising for estimation of lines CA. in our research, two lines ORK 9 and ORK 21 demonstrated the high average seed yield of test-hybrids in two years of the research and can be recommended for usage as testers.

Heterotic response and combining ability analysis in F1 diallel populations of Brassica napus L.

2019 ◽  
Vol 51 (6) ◽  
Author(s):  
Samrin Gul ◽  
Razi Uddin ◽  
Naqib Ullah Khan ◽  
Shahid Ullah Khan ◽  
Sardar Ali ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Combining Ability ◽  
Brassica Napus L ◽  
Combining Ability Analysis

Heterosis and combining ability analysis in Chinese semi-winter × exotic accessions of rapeseed (Brassica napus L.)

Euphytica ◽  
2018 ◽  
Vol 214 (8) ◽  
Author(s):  
Siraj Ahmed Channa ◽  
Hongyun Tian ◽  
Maarouf I. Mohammed ◽  
Ruijie Zhang ◽  
Shah Faisal ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Combining Ability ◽  
Brassica Napus L ◽  
Combining Ability Analysis

Analysis of Combining Ability in Brassica napus L. Lines for Yield Associated Traits

2006 ◽  
Vol 9 (12) ◽  
pp. 2333-2337 ◽  
Author(s):  
Abdul Wahab Nassimi ◽  
Raziuddin . ◽  
Naushad Ali . ◽  
Sardar Ali . ◽  
Jehan Bakht .
Keyword(s):  
Brassica Napus ◽  
Combining Ability ◽  
Brassica Napus L

scholarly journals Biplot analysis of seed yield and oil content combining ability in rapeseed (Brassica napus L.)

2016 ◽  
Vol 10 (9) ◽  
pp. 1238-1243
Author(s):  
Gul Ghani ◽  
◽  
Raziuddin ◽  
Antonio Teixeira do Amaral Júnior ◽  
Ibni Amin Khalil ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Combining Ability ◽  
Oil Content ◽  
Brassica Napus L ◽  
Biplot Analysis

INHERITANCE OF YIELD AND OTHER QUANTITATIVE CHARACTERS IN BRASSICA NAPUS VAR. NAPOBRASSICA

1982 ◽  
Vol 24 (4) ◽  
pp. 459-465 ◽  
Author(s):  
I. Grant ◽  
Patricia M. Harney ◽  
B. R. Christie
Keyword(s):  
Brassica Napus ◽  
Combining Ability ◽  
Root Length ◽  
Diallel Cross ◽  
Root Diameter ◽  
Fresh Weight ◽  
Brassica Napus L ◽  
Partial Dominance ◽  
Additive Gene ◽  
Positive Heterosis

Highly significant positive heterosis was found for root length, diameter and fresh weight in F1 hybrids derived in a seven-parent diallel cross of commercially available cultivars of Brassica napus L. var. napobrassica Mill. Significant general combining ability and specific combining ability effects and a preponderance of additive gene action were also noted for root length, diameter and fresh weight. The inheritance of these three traits is thought to be conditioned by additivity at the majority of loci and partial dominance at the remaining ones. Heritability estimates ranged from 0% for dry matter to 26% for root diameter.

Re-evaluating sowing time of spring canola (Brassica napus L.) in south-eastern Australia—how early is too early?

2016 ◽  
Vol 67 (4) ◽  
pp. 381 ◽  
Author(s):  
J. A. Kirkegaard ◽  
J. M. Lilley ◽  
R. D. Brill ◽  
S. J. Sprague ◽  
N. A. Fettell ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Oil Content ◽  
Yield Variability ◽  
Sensitivity Index ◽  
Brassica Napus L ◽  
South Eastern ◽  
Spring Canola ◽  
Sowing Dates ◽  
Eastern Australia ◽  
South Eastern Australia

Optimising the sowing date of canola (Brassica napus L.) in specific environments is an important determinant of yield worldwide. In eastern Australia, late April to early May has traditionally been considered the optimum sowing window for spring canola, with significant reduction in yield and oil in later sown crops. Recent and projected changes in climate, new vigorous hybrids, and improved fallow management and seeding equipment have stimulated a re-evaluation of early-April sowing to capture physiological advantages of greater biomass production and earlier flowering under contemporary conditions. Early–mid-April sowing generated the highest or equal highest yield and oil content in eight of nine field experiments conducted from 2002 to 2012 in south-eastern Australia. Declines in seed yield (–6.0% to –6.5%), oil content (–0.5% to –1.5%) and water-use efficiency (–3.8% to –5.5%) per week delay in sowing after early April reflected levels reported in previous studies with sowings from late April. Interactions with cultivar phenology were evident at some sites depending on seasonal conditions. There was no consistent difference in performance between hybrid and non-hybrid cultivars at the earliest sowing dates. Despite low temperatures thought to damage early pods at some sites (<−2°C), frost damage did not significantly compromise the yield of the early-sown crops, presumably because of greater impact of heat and water-stress in the later sown crops. A validated APSIM-Canola simulation study using 50 years of weather data at selected sites predicted highest potential yields from early-April sowing. However, the application of a frost-heat sensitivity index to account for impacts of temperature stress during the reproductive phase predicted lower yields and higher yield variability from early-April sowing. The frost–heat-limited yields predicted optimum sowing times of mid-April at southern sites, and late April to early May at the northern sites with lower median yield and higher yield variability in crops sown in early April. The experimental and simulation data are potentially compatible given that the experiments occurred during the decade of the Millennium drought in south-eastern Australia (2002–10), with dry and hot spring conditions favouring earlier sowing. However, the study reveals the need for more accurate and validated prediction of the frost and heat impacts on field-grown canola if simulation models are to provide more accurate prediction of attainable yield as new combinations of cultivar and sowing dates are explored.

scholarly journals Role of salicylic acid in heat stress tolerance in tri-genomic Brassica napus L.

2020 ◽  
Vol 33 (1) ◽  
pp. 13-20
Author(s):  
Muhammad Awais Ghani ◽  
Muhammad Mehran Abbas ◽  
Basharat Ali ◽  
Khurram Ziaf ◽  
Muhammad Azam ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Heat Stress ◽  
High Temperature ◽  
Brassica Napus ◽  
Biochemical Analysis ◽  
Foliar Application ◽  
Brassica Napus L ◽  
Elevated Activity ◽  
Heat Stress Tolerance

Tri-genomic Brassica napus L.wasdeveloped by the cross between Brassica napusand Brassica nigra. The crop is animportant source of vegetable seed oil in Pakistan,after cotton. The low oilseed rape yield is attributed to high temperature in the production zones. Interspecific hybridization using these two speciescan be helpful to produce heat resistant hybrids. On the other hand, it has been found that foliar application of different plant growth regulators can be used to reduce the heat stress in Brassica. The objectiveof this studywas to test the response of three different tri-genomic hybrids to high temperature stressat seedling stage. Seedlings were foliar sprayed with 0.13 mM salicylic acid (SA) prior to exposure tohigh temperatureat two true leaf stage. The plants were harvested after 30 days of sowing for growth and biochemical analysis. Plants ofV38 showed the highest values for all morphological traits and biochemical activities among the threehybrids. In general, plants exposed to the temperature stress exhibited a significant decline in growth, chlorophyll content and enzyme activity.Foliar application of SA significantly improved leaf and root biomass under heat stress.Further, antioxidativeenzyme activities significantly increased in response to SA either compared to control or to plants exposed to temperature stress.It is concluded thatapplication of salicylic acid elevated activity of antioxidative enzymes and was helpful in mitigating the detrimental effects of high temperature inoil seed rape.

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