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 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.

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.

scholarly journals Combining Ability Analysis of Yield Components in Cucumber

2002 ◽  
Vol 127 (6) ◽  
pp. 931-937 ◽  
Author(s):  
Ana I. López-Sesé ◽  
Jack Staub
Keyword(s):  
Combining Ability ◽  
Yield Components ◽  
Block Design ◽  
Yield Component ◽  
Branch Number ◽  
Fruit Number ◽  
Horticultural Traits ◽  
Combining Ability Analysis ◽  
Component Traits ◽  
Yield Component Traits

Three U.S.-adapted Cucumis sativus var. sativus L. lines and one C. sativus var. hardwickii (R.) Alef.-derived line were crossed in a half-diallel design to determine their combining ability for several yield-related traits (yield components). Six F1 progenies were evaluated in a randomized complete block design with eight replications in 1999 and 2000 for fruit number and length/diameter ratio (L:D), lateral branch number, number of female flowering nodes, and days to anthesis. Combining ability was significantly influenced (p < 0.05) by year for most of the horticultural traits examined. General combining ability (GCA) was significant for all traits in each year. Specific combining ability (SCA) was significant in magnitude and direction for only fruit number and days to anthesis. Data indicate that the C. sativus var. hardwickii-derived inbred line WI 5551 possessed SCA for yield component traits, and thus maybe useful for improving fruit yield in commercial cucumber.

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