scholarly journals Combining Ability and Gene Action for Yield Characteristics in Novel Aromatic Cytoplasmic Male Sterile Hybrid Rice under Water-Stress Conditions

Agriculture ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 226
Author(s):  
Hamdi F. El-Mowafi ◽  
Muneera D. F. AlKahtani ◽  
Rizk M. Abdallah ◽  
Amr M. Reda ◽  
Kotb A. Attia ◽  
...  
Keyword(s):  
Water Stress ◽  
Combining Ability ◽  
Hybrid Rice ◽  
Yield Component ◽  
Stress Conditions ◽  
Male Sterile ◽  
Genetic Components ◽  
Component Traits ◽  
Parental Lines ◽  
Yield Component Traits

Hybrid rice parental lines with better combining abilities provide an efficient tool to increase rice production. In the current study, twenty hybrid combinations were generated from five aromatic cytoplasmic male sterile (CMS) lines and four restorer lines (three of them aromatic) using a line × tester mating design. The hybrids and their parental lines were evaluated under two water regimes: normal irrigation and water-stress. Ten yield-component traits were studied over a period of 2 years, and the significant differences between the parents and hybrids are reported in this investigation. Overall, all yield component traits were significantly affected by the water deficit and were governed by both additive and non-additive gene actions. More specifically, the grain yield (GY) was mainly controlled by non-additive gene action under both normal and water-stress conditions. The contribution of the additive variance (σ2 A) was more prominent in the genetic components of traits as compared to the dominance variance (σ2 D). The aromatic parental line CMS IR58025A and the restorer line PR2 were recorded as the best combiners for the GY and good combiners for many other characteristics under both growth conditions. The cross combinations Pusa12A/IR25571-31R and Pusa12A/Giza-Basmati-201 revealed significantly positive specific combining ability (SCA) effects for the GY under both normal and water-stress conditions. The inconsistent correlation between the general combining ability (GCA) and SCA manifested complex interactions among the positive and negative alleles of the genes controlling the yield traits. Generally, the findings of this investigation demonstrated the importance of the GCA and SCA for understanding the genetic components and gene actions of the yield characteristics in new aromatic hybrid rice parental lines. Therefore, we recommend considering these findings in the selection of elite parents for developing superior aromatic hybrid rice varieties under water-stress conditions.

Combining Ability of Yield-Component Traits for Indica Chromosome Substituted Segments in Japonica Hybrid Rice

2008 ◽  
Vol 34 (8) ◽  
pp. 1308-1316
Author(s):  
Chuan-Yuan YU ◽  
Ling JIANG ◽  
Ying-Hui XIAO ◽  
Hu-Qu ZHAI ◽  
Jian-Min WAN
Keyword(s):  
Combining Ability ◽  
Hybrid Rice ◽  
Yield Component ◽  
Component Traits ◽  
Yield Component Traits

scholarly journals Combining ability, floral biology, and seed producibility of promising cytoplasmic male-sterile (CMS) lines for hybrid rice development

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Victoriano V. Casco ◽  
Rosemarie T. Tapic ◽  
Jerwin R. Undan ◽  
Anna Ma. Lourdes S. Latonio ◽  
Roel R. Suralta ◽  
...  
Keyword(s):  
Combining Ability ◽  
Hybrid Rice ◽  
Floral Biology ◽  
Outcrossing Rate ◽  
Floral Traits ◽  
Male Sterile ◽  
Ability Test ◽  
Cytoplasmic Male Sterile ◽  
Combining Abilities ◽  
Parental Lines

Abstract Background A combining ability analysis is a useful tool of plant breeders in screening and identifying promising parental lines with high potential for developing competitive rice hybrids. Also, one important factor that strongly determines the suitability of commercial utilization of hybrid rice parental lines is their extent of seed producibility. Methods In this study, the combining ability, floral biology and seed producibility of cytoplasmic male sterile (CMS) lines were investigated to identify good combiners with good seed production potential. The Line × Tester analysis was used to determine the general combining abilities (GCA) of hybrid rice parental lines, and Specific Combining Abilities (SCA) of the different hybrid combinations. A correlation analysis was also done to determine floral traits that influence the outcrossing rate of the CMS lines. There were 4 CMS lines, 6 restorer lines, 24 hybrid combinations and 1 check variety in a randomized complete block Design (RCBD) with 3 replicates. Results Results indicated that CMS lines IR79128B and IR102758B were good combiners and the most promising restorer lines were D2031-7-1-2R, Hanareumbyeo 2, and XTR036-54-10R. Based on specific combining ability test, the most promising combination was entry 10 (IR58025A/D2013-7-1-2R). It has the highest yield of 7496 kg ha−1, a high positive SCA score of 570.54, and highest standard heterosis of 12.9%. Based on floral traits, IR79128B was the most promising with a high positive GCA score of 186.93, panicle exertion rate of 74.8%, and a high outcrossing rate of 51%. There was a significant positive association between outcrossing rate, duration of floral opening, panicle exertion rate, and general combining ability. Conclusion The floral traits found to be significantly associated with outcrossing rate are useful selection criteria not only for identifying economically usable CMS lines but also for developing new and promising parental lines and hybrids. These CMS lines do not only give heterotic combinations but are also commercially producible, the two most important factors to the success of any hybrid rice breeding program.

scholarly journals Selection of parental lines among round fruited brinjal for hybridization aiming at export promotion

2017 ◽  
Vol 9 (1) ◽  
pp. 451-455
Author(s):  
Varun Durwas Shende ◽  
Tania Seth ◽  
Subhra Mukherjee ◽  
Arup Chattopadhyay
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Yield Component ◽  
Fruit Yield ◽  
Component Traits ◽  
Parental Lines ◽  
Yield Component Traits ◽  
Marketable Fruit ◽  
Selection Of

Selection of parental lines for considering export trade in hybridization programme is a new approach in brinjal breeding. Eight quantitative characters were taken to estimate genetic variation and relationships among twenty seven genotypes of round fruited brinjal, and to identify potential donors for the development of recombinants suitable for export. Analysis of variation revealed considerable level of variability among the genotypes. High broad sense heritability (˃80 %) and genetic advance as per cent of mean (˃20 %) were observed for the maximum number of traits under study. Among the yield components, only number of marketable fruits per plant showed positive and significant correlation (r = 0.771 and 0.725 at genotypic and phenotypic level, respectively) with marketable fruit yield per plant. However, number of marketable fruits per plant (1.24) followed by average fruit weight (0.834) ex-hibited maximum positive direct effects on marketable fruit yield per plant suggesting to give emphasis on these traits while imposing selection for amenability in fruit yield of round fruited brinjal. Principal component analysis showed the amount of variation by principal components 1 to 4 viz., 26.75, 49.98, 69.81 and 84.28 %, respectively. Divergence analysis based on various yield component traits grouped 27 brinjal genotypes into nine main clusters. Dendrogram based on hierarchal clustering grouped genotypes based on their yield component traits rather than their geographic origin. Based on averages and principal component analysis, six genotypes (BCB-30, Deshi Makra, Gujrat Brinjal Round, 09/BRBWRes-3, BCB-10, 10/BRRVar-2) appeared to be promising donors for use in export oriented breeding programme.

Combined Genetic Analysis of Brown Spot (Helminthosporium oryzae) Disease for Developed Hybrid Combinations and their Parental Lines in Hybrid Rice

2018 ◽  
Vol 1 ◽  
pp. 37-48
Author(s):  
Mostafa Mamdouh Elshenawy ◽  
Walid Hassan Elgamal ◽  
Galal Bakr Anis ◽  
Fatma Awad
Keyword(s):  
Hybrid Rice ◽  
Natural Infection ◽  
Block Design ◽  
Brown Spot ◽  
Male Sterile ◽  
Rice Varieties ◽  
Genetic Components ◽  
Female Line ◽  
Parental Lines ◽  
Helminthosporium Oryzae

This experiment was carried out at the Farm of Rice Research and Training Center, Sakha, Kafrelsheikh, Egypt during three rice grown seasons from 2014-2016. Three cytoplasmic male sterile lines, two wild abortive type (WA); IR69625A, IR70368A and one (K-type) K17A as females were tested with seven rice genotypes Giza 178, Giza 179, Giza 181,Giza 182, Sakha 105, GZ 6296-12-1-2-1-1 and HR195R as testers using line x tester model of hybridization. The parental lines and their resulting (21F1crosses) were evaluated in Randomized Complete Block Design (RCBD) experiment having three replications during 2015 and 2016 growing seasons and surrounded by susceptible rice varieties i.e. Giza 171, Giza 177 and Giza 159 as natural infection to brown spot (Helminthosporium oryzae). Three brown spot acceptability traits; disease severity (%), infected leaves (%) and infected grains/panicle (%) were observed during this investigation. The combined data was calculated over both seasons to test the interaction of the different genetic components. According to the results, the male parents Giza178, Giza179, HR195, Giza 181 and Giza 182 could be utilized either for producing new hybrid combinations or for developing new parental lines in brown spot resistance program. The female line K17A was found to have a good combiner to brown spot resistance. Evaluation of hybrids for heterosis breeding based on mean performance, better-parent (BP %) and mid-parent heterosis (MP %) indicated that, out of 21F1hybrid rice combinations, one hybrid K17A x Giza182 found significantly desirable values for most brown spot traits and can be utilized as commercial hybrids resistant to brown spot disease.

scholarly journals Combining ability of potato parents for tuber appearance and tuber yield component traits

2017 ◽  
Vol 17 (2) ◽  
pp. 99-106 ◽  
Author(s):  
Laerte Reis Terres ◽  
Emerson Andrei Lenz ◽  
Dediel Rocha ◽  
Murilo Cerioli ◽  
Arione da Silva Pereira
Keyword(s):  
Combining Ability ◽  
Tuber Yield ◽  
Yield Component ◽  
Component Traits ◽  
Yield Component Traits

scholarly journals Combining Ability and Heterosis for Some Yield Component Traits in a 10x10 Diallel Cross of Rice (Oryza sativa L.)

2020 ◽  
pp. 24-34
Author(s):  
T. Vange ◽  
G. O. S. Ojo ◽  
A. M. Ladan
Keyword(s):  
Combining Ability ◽  
Oryza Sativa L ◽  
Yield Component ◽  
Leaf Length ◽  
Panicle Length ◽  
Rice Varieties ◽  
Additive Variance ◽  
Days To Flowering ◽  
Component Traits ◽  
Yield Component Traits

A ten – parent diallel experiment was carried out at the Teaching and Research Farms of the Federal University of Agriculture, Makurdi, Nigeria, to estimate combining ability and heterosis in rice. The design was a 10x10 alpha lattice with three replications and data was collected on plant height (PH), tiller numbers/plant (TN), leaf length (LL) and width (LW), days to flowering (DF), panicle length (PL), panicle exsertion (PE), spikelet numbers/panicle (SN), 100 seed weight (100SW) and days to maturity(DM). A preponderance of both additive and non – additive gene action with both negative and positive GCA, SCA and % heterosis was observed in the control of yield component traits in the studied rice varieties and their hybrids. Non – additive variance was higher, except for DF, SN and DM where additive variance was higher compared to non – additivity. Six parents, namely MGD 101, FARO 44, FARO 52, FARO 57, STRASSA 58 and IR 72 recorded the highest GCA values for most of the traits and the least values in terms of days to flowering and maturity. These parents were the most frequent in crosses with the highest SCA effects and % heterosis for Tiller number, Leaf length, leaf width, panicle length and Spikelet numbers/panicle. Crosses involving these six parents also recorded the least SCA effects and % heterosis for days to flowering and maturity. Based on the results of GCA, SCA and % heterosis, backcross breeding of F1s to their respective parents (the six parents), was recommended for improvement of yield component traits.

scholarly journals Heterosis and Combining Ability for Grain Yield and Yield Component Traits of Maize in Eastern Ethiopia

2015 ◽  
Vol 3 (2) ◽  
pp. 118-127 ◽  
Author(s):  
Habtamu Zeleke
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Genetic Variance ◽  
Additive Genetic Variance ◽  
Kernel Weight ◽  
Yield Component ◽  
Days To Maturity ◽  
Component Traits ◽  
The Mean ◽  
Yield Component Traits

Combining ability analysis for grain yield and yield component traits in maize were carried out in 8×8 diallel cross. The analysis of variance showed there is highly significant variation between the genotypes for all the traits considered. Year of testing was significant only for days to maturity and grain yield per hectare. The highest percentage of heterosis for grain over the standard varieties (BH 660) was observed by the cross L1 x L4 (29.3%) followed by crosses L1 x L5 (28.3%), L3 x L5 (21.7%) and L1 x L7 (20.8%). Mid-parent heterosis for days to maturity ranged from -2.5 to -23.9%, whereas that of better parent heterosis ranged from 0 to -13% indicating that the hybrids tend to be earlier in maturity than the parents. The mean squares due to GCA for days to maturity, ear diameter, member of kernels per row, 1000 kernel weight and grain yield were significant, indicating the importance of additive genetic variance in controlling these traits. The mean squares due to SCA were also significant for days to maturity, ear length, member of kernels per row and 1000 kernel weight indicating the importance of non-additive genetic variance in controlling these traits. The inbred lines L1, L3, and L4 were good general combiners for grain yield.

Sign in / Sign up

Export Citation Format

Share Document