Selection of best gene pool combination of the basis of heterotic response analysis for grain yield and its contributing traits in Rice (Oryza sativa L.)

2020 ◽  
Vol 5 (02) ◽  
pp. 233-241
Author(s):  
Sonu Kumar ◽  
M. P. Chauhan ◽  
Amit Tomar
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Gene Pool ◽  
Oryza Sativa L ◽  
Response Analysis ◽  
Standard Variety ◽  
Standard Heterosis ◽  
The Cross ◽  
Positive Heterosis ◽  
Selection Of

The results were indicated that, out of sixty crosses, the most desirable five crosses showing high significant positive heterosis over better parent for grain yield per plant were IR 79156A X NDR 370132 (72.19%), IR 68888A X NDR 370132 (66.69%), IR 68897A X NDR 370131 (43.33%), IR 58025A X CR 2499 (40.71%) and IR 79156A X NDR 2701 (35.80%). Eighteen crosses showed positive and significant heterosis over standard variety and the best five crosses among them were IR 58025A X NDR 1127 (20.78%), IR 79156A X IR 27723 (14.87%), IR 68888A X IR 27723 (14.81%), IR 58025A X Sugandha 5 (12.84%) and IR 68897A X NDR 2701 (12.46%). The cross, IR 58025A X NDR 1127, showed highest mean performance (28.70g), heterobeltiosis (22.48%) and standard heterosis (20.78%) for grain yield per plant while highest yielding parent, NDR-359, produced mean grain yield 23.78 g.

scholarly journals Combining Ability and Heterosis for Grain Yield and its Component Traits in Rice(Oryza sativa L.)

2013 ◽  
Vol 5 (1) ◽  
pp. 90-97 ◽  
Author(s):  
Srikrishna LATHA ◽  
Deepak SHARMA ◽  
Gulzar S. SANGHERA
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Analysis Of Variance ◽  
Combining Ability ◽  
Oryza Sativa L ◽  
F1 Hybrids ◽  
Component Traits ◽  
Standard Heterosis ◽  
High Degree ◽  
Yield Trials

The nature and magnitude of heterosis and combining ability was studied in 18 F1 hybrids involving three CMS lines and six testers using line × tester analysis. The analysis of variance for combining ability of all the traits showed that variances due to treatments, parents, hybrids were highly significant. The line ‘CRMS 32A’ and testers viz. ‘Super rice-8’, ‘R 1099-2569-1-1’ and ‘Jitpiti’ were identified as good general combiners. The significant differences between lines x testers interaction indicates that SCA attributed heavily in the expression of these traits and demonstrates the importance of dominance or non additive variances for all the traits. The hybrid ‘CRMS 32A’/‘R 1099-2569-1-1’ and ‘APMS 6A’/‘Super rice-8’ were promising for grain yield. The magnitude of relative heterosis, heterobeltiosis and standard heterosis were also estimated for different characters. A high degree of relative heterosis was observed for grain yield (20.45- 82.37%) in the hybrids viz., ‘CRMS 32A’/‘Super rice-8’, ‘APMS 6A’/‘Super rice-8’, ‘APMS 6A’/‘Jitpiti’ and ‘CRMS 32A’/‘R 1099-2569-1-1’. While, a higher degree of: heterobeltiosis (13.60 -68.37%) was observed for grain yield in the hybrids viz., ‘CRMS 32A’/‘Super rice-8’, ‘CRMS 32A’/‘R 1099-2569-1-1’, ‘APMS 6A’/’Super rice-8’ and ‘APMS 6A’/’Jitpiti’. A high degree of standard heterosis was observed for grain yield in the hybrid ‘CRMS 32A’/‘R 1099-2569-1-1’. The hybrid ‘CRMS 32A’/ ‘R 1099-2569-1-1’ recorded a high degree of relative heterosis (62.01%), heterobeltiosis (57.35%) and standard heterosis (15.05 and 25.51% over check hybrids, ‘Mahamaya’ and ‘Indirasona’, respectively) that can be tested on yield trials for its further testing over locations.

scholarly journals ESTIMATION OF STANDARD HETEROSIS FOR REPRODUCTIVE TRAITS IN NEWLY SYNTHESIZED TEST RICE (Oryza sativa L.) HYBRIDS

2015 ◽  
Vol 28 (1) ◽  
pp. 9-16
Author(s):  
M. Ariful Islam ◽  
M. A. K. Mian ◽  
M. G. Rasul ◽  
M. K. Bashar
Keyword(s):  
Oryza Sativa ◽  
Life Cycle ◽  
Oryza Sativa L ◽  
Reproductive Traits ◽  
Great Contribution ◽  
Standard Heterosis ◽  
Positive Heterosis

An experiment was carried to estimate heterotic performances of newly developed test hybrids utilizing CMS system during Rabi 2011 using RCBD design. Five known CMS lines and sixteen developed R-lines were crossed through line × tester analysis. Eighty test hybrids were developed. It is very difficult to find a hybrid earlier to BRRI dhan28 as life cycle of 140 days. Heterosis for days to first flowering varied from -6.23% to 16.35% with a SD of 4.47 meanwhile heterosis for days to 80% flowering varied from -9.24% to 11.04% with a SD of 4.03. Among eighty crosses seventy two were found positive heterosis for days to first flowering but sixty four crosses were found for days to 80% flowering. RG-BU08-016R crosses with IR58025A (-2.68*) and IR62820A (-3.42**) showed significant negative standard heterosis for days to first flowering. Five crosses of IR58025A showed significant negative heterosis with RG-BU 08-005R (-3.42*), RG-BU 08-006R (-5.28**), RG-BU 08-013R (-4.129**), RG-BU 08-016R (-5.78**), RG-BU 08-018R (-4.06*) for days to 80% flowering. Besides these 4 crosses of IR62820A showed significant negative heterosis with RG-BU 08-007R (-2.32*), RG-BU 08-016R (-6.03*), RG-BU 08-018R (-4.58**) followed by GAN 46A/RG-BU 08-006R (-4.58*), BRRI 1A/RG-BU 08-001R (-2.55**) and BRRI 1A/RG-BU 08-006R (-9.24**) resulted significant negative heterosis for days to 80% flowering. Positive heterosis were recorded for IR58025A with RG-BU 08-007R (26.97**), RG-BU 08-0046R (8.77**) and RG-BU 08-105R (14.44**) for PER and RG-BU 08-018R (42.46**), RG-BU 08-046R (112.30**), RG-BU 08-057R (27.46*) for SER. While two R-lines, RG-­BU 08-013R (25.41**) and RG-­BU 08-057R (7.21*) were found having significant positive heterosis for panicle exertion rate crosses with IR62820A but RG-BU 08-025R (52.82**), RG-BU 08-057R (122.66**) and RG-BU 08-063R (37.38**) were found having significant positive heterosis for SER. IR62820A/RG-BU08-057R showed significant positive heterosis for both panicle and stigma exertion rate. GAN46A/RG­-BU 08-063R (5.65* & 133.02**) was recorded showing significant positive heterosis for both panicle and stigma exertion rate where. But the crosses of IR68888A was not shown exhibiting a great contribution for panicle and stigma exertion rate except RG-BU08-018R (25.94**). Meanwhile the crosses of BRRI1A was recorded having significant positive heterosis for PER with RG-­BU08-005R (13.41**), RG-­BU08-007R (5.65*) and RG-BU08-097R (25.94**) as well as RG-BU08-007R (133.02**), RG-BU08-013R (48.19**) and RG-BU08-038R (29.21*) were recorded having significant positive heterosis for SER.

scholarly journals Study on Standard Heterosis for Yield, Quality and its Attributing Characters in Rice (Oryza sativa L.) Hybrids under Aerobic Cultivation

2020 ◽  
pp. 275-285
Author(s):  
P. Madhukar ◽  
S. Vanisri ◽  
P. Senguttuvel ◽  
Ch. Surender Raju ◽  
S. Narender Reddy ◽  
...  
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Oryza Sativa L ◽  
Aerobic Condition ◽  
Elongation Ratio ◽  
Head Rice ◽  
Kernel Length ◽  
Yield Quality ◽  
Standard Heterosis ◽  
Positive Heterosis

Field experiments were conducted for development and evaluation of aerobic rice hybrids during2015-16 to 2016-17 years. In the first experiment sufficient amount of variability was observed for grain yield per plant and its components among 125 genotypes evaluated in aerobic condition. Among these eight genotypes were the top ranking yield in aerobic conditions and good restorers tested by Test Cross Nursery and Rf3, Rf4 fertility restorer gene screening. Than 32 hybrids were produced involving 4 CMS lines (CMS23A, CMS59A, CMS64A and IR68897A) and 8 testers (SVHR-3005, NH-12-103R, KMP-128, MTU-1001, KMP-175, SV-315-081R, RNR-21280 and MTU-1075) and evaluated along with three checks (viz., hybrid check, KRH-2, inbred checks, MTU-1010, MAS-946) under aerobic situation and  carryout standard heterosis analysis, to identify best heterotic hybrids over local checks. CMS23A x SV-315-081R manifested high heterotic effects (>20%) for grain yield per plant over the standard checks, besides for important components. Few more CMS59A x KMP-175, CMS59A x RNR-21280, CMS23A x MTU-1001, IR-68897A x MTU-1075 and CMS23A x MTU-1075 were also identified as potential hybrids in view of higher amount of heterosis. For quality, CMS64A x RNR-21280 (hulling percentage, milling percentage, head rice recovery and kernel elongation ratio) and CMS23A x SV-315-081R (head rice recovery, kernel length, L/B ratio and Kernel length after cooking) were best heterotic hybrids. Two crosses viz., CMS59A x SVHR-3005 and CMS64A x SVHR-3005 expressed negative heterosis for kernel breadth and positive heterosis for kernel L/B ratio which was desirable.

Efficacy of some insecticide modules against major insect pests and spider population of rice, Oryza sativa L.

ENTOMON ◽  
2018 ◽  
Vol 43 (4) ◽  
pp. 257-262
Author(s):  
Atanu Seni ◽  
Bhimasen Naik
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Untreated Control ◽  
Insect Pests ◽  
Oryza Sativa L ◽  
Gall Midge ◽  
Stem Borer ◽  
The Other ◽  
The Third ◽  
Treated Plot

Experiments were carried out to assess some insecticide modules against major insect pests of rice. Each module consists of a basal application of carbofuran 3G @ 1 kg a.i ha-1 at 20 DAT and Rynaxypyr 20 SC @ 30 g a.i ha-1 at 45 DAT except untreated control. All modules differ with each other only in third treatment which was applied in 65 DAT. The third treatment includes: Imidacloprid 17.8 SL @ 27 g a.i ha-1, Pymetrozine 50 WG @ 150 g a.i ha-1, Triflumezopyrim 106 SC @ 27 g a.i ha-1, Buprofezin 25 SC @ 250 g a.i ha-1; Glamore (Imidacloprid 40+Ethiprole 40% w/w) 80 WG @ 100 g a.i. ha-1, Thiacloprid 24 SC @ 60 g a.i ha-1, Azadirachtin 0.03 EC @ 8 g a.i ha-1, Dinotefuran 20 SG@ 40 g a.i ha-1 and untreated control. All the treated plots recorded significantly lower percent of dead heart, white ear- head caused by stem borer and silver shoot caused by gall midge. Module with Pymetrozine 50 WG @ 150 g a.i ha-1 treated plot recorded significantly higher per cent reduction of plant hoppers (>80% over untreated control) and produced higher grain yield (50.75 qha-1) than the other modules. Among the different treated modules the maximum number of spiders was found in Azadirachtin 0.03 EC @ 8 g a.i ha-1 treated module plot followed by other treatments.

Correlation Studies on Grain Yield and its Component Traits in Rice (Oryza sativa L.)

2012 ◽  
Vol 2 (11) ◽  
pp. 13-14
Author(s):  
R. ARULMOZHI R. ARULMOZHI ◽  
◽  
Dr. A. MUTHUSWAMY Dr. A. MUTHUSWAMY
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Correlation Studies ◽  
Component Traits

Azolla (Azolla filiculoides) compost improves grain yield of rice (Oryza sativa L.) under different irrigation regimes

2018 ◽  
Vol 209 ◽  
pp. 1-10 ◽  
Author(s):  
Teimour Razavipour ◽  
Sina Siavash Moghaddam ◽  
Sahar Doaei ◽  
Seyyed Ali Noorhosseini ◽  
Christos A. Damalas
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Azolla Filiculoides ◽  
Irrigation Regimes

Identification and characterization of the erect-pose panicle gene EP conferring high grain yield in rice (Oryza sativa L.)

2009 ◽  
Vol 119 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Jiayu Wang ◽  
Tetsuya Nakazaki ◽  
Shuqian Chen ◽  
Wenfu Chen ◽  
Hiroki Saito ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Identification And Characterization
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