Evaluating Genetic Parameters and Combining Ability of Starch Viscosity Parameters in Rice Cultivars (Oryza sativa L.)

This study was undertaken to assess the combining ability of 6 rice varieties, for viscosity parameters and determining gene action controlling Rapid Visco Analyser (RVA) characters. F2 progenies derived from a 6×6 half diallel mating design with their parents were grown in a randomized complete block design with three replications at the research farm of Rice Research Institute of Iran (RRII) in 2015. The diallel analysis by Griffing`s method indicated the involvement of additive and non-additive gene actions controlling RVA traits. For traits PV and FV RI18447-2 and IR50 were the best combiners for increasing and decreasing, respectively. Deylamani and IR50 were the best combiners for increasing and decreasing BV, respectively. Beside, due to more portion of non-additive gene action in controlling trait SV, The Gilaneh × RI18430-46, and Deylamani × RI18430-46 crosses were the best for increasing and decreasing SV, respectively. The high estimates of broad sense heritability and narrow sense heritability for BV and FV, indicated the importance of additive effects in expression of these traits. Therefore, selection base breeding methods will be useful to improve these traits and selection in the early generations could be done to fix the favourable genes. Low estimate of narrow sense heritability for SV revealed that non-additive gene effects play important role in controlling setback viscosity. So, hybrid base breeding methods will be useful to improve this trait.

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Combining ability analysis and gene action for yield and yield related traits in rice (Oryza sativa L.) under saline conditions

Journal of Plant Breeding and Genetics ◽

10.33687/pbg.007.02.2831 ◽

2019 ◽

Vol 7 (2) ◽

pp. 63-74

Author(s):

Sieh S. Kargbo ◽

Francis Showemimo ◽

Pius Akintokun ◽

Justina Porbeni

Keyword(s):

Plant Height ◽

Combining Ability ◽

Gene Action ◽

Oryza Sativa L ◽

Block Design ◽

Narrow Sense Heritability ◽

Cropping Season ◽

Significant Difference ◽

Combining Ability Analysis ◽

Additive Gene

Salinity is a major abiotic constrain faced by farmers in most rice cultivating areas of the world and improving grain yield in rice is the most important breeding objective. Twenty seven hybrids were generated in a line x tester mating design and were evaluated with their parents in a Randomized Complete Block Design at the Fadama site of the Federal University of Agriculture, Abeokuta (FUNAAB) during the 2014/2015 and 2015/2016 cropping season. Analysis of variance revealed a highly significant difference (P0.01) among testers and lines for all traits except panicle length and a number of effective tillers per plant, respectively. Variances of Specific Combining Ability (SCA) were higher in magnitude than the corresponding General Combining Ability (GCA). The lines FARO 60 (P7), OG300315 (P10), NERICA L53 (P4) including a tester ITA 212 (P1) were the best general combiners for yield per plant. POKKALI (P3) was the best general combiner for reduced vegetative growth and ITA 212 (P1) and ITA 222 (P2) were the best general combiners for plant height. The best specific combiner for yield per plant was P1 x P4. P3 x P11 was the best specific combiner for reduced duration characters and P2 x P7 was the best specific combiner for plant height. Estimates of narrow sense heritability (0.00 – 0.03) for all the traits under study were low which indicated preponderance of non-additive gene action governing these traits. Therefore, inter-mating among selected segregants followed by recombination breeding in an advanced generation might be advocated for improvement of the studied traits under salinity.

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Combining ability and gene action studies for yield-contributing traits in crosses involving winter and spring wheat genotypes

Acta Agronomica Hungarica ◽

10.1556/aagr.57.2009.4.4 ◽

2009 ◽

Vol 57 (4) ◽

pp. 417-423 ◽

Cited By ~ 1

Author(s):

S. Sharma ◽

H. Chaudhary

Keyword(s):

Winter Wheat ◽

Spring Wheat ◽

Combining Ability ◽

Gene Action ◽

Block Design ◽

Additive Gene Action ◽

Wheat Genotypes ◽

Diallel Mating Design ◽

Additive Gene ◽

Wheat Hybrids

The success of winter × spring wheat hybridization programmes depends upon the ability of the genotypes of these two physiologically distinct ecotypes to combine well with each other. Hence the present investigation was undertaken to study the combining ability and nature of gene action for various morpho-physiological and yield-contributing traits in crosses involving winter and spring wheat genotypes. Five elite and diverse genotypes each of winter and spring wheat ecotypes and their F 1 (spring × spring, winter × winter and winter × spring) hybrids, generated in a diallel mating design excluding reciprocals, were evaluated in a random block design with three replications. Considerable variability was observed among the spring and winter wheat genotypes for all the traits under study. Furthermore, these traits were highly influenced by the winter and spring wheat genetic backgrounds, resulting in significant differences between the spring × spring, winter × winter and winter × spring wheat hybrids for some of the traits. The winter × spring wheat hybrids were observed to be the best with respect to yieldcontributing traits. On the basis of GCA effects, the spring wheat parents HPW 42, HPW 89, HW 3024, PW 552 and UP 2418 and the winter wheat parents Saptdhara, VWFW 452, W 10 and WW 24 were found to be good combiners for the majority of traits. These spring and winter wheat parents could be effectively utilized in future hybridization programmes for wheat improvement. Superior hybrid combinations for one or more traits were identified, all of which involved at least one good general combiner for one or more traits in their parentage, and can thus be exploited in successive generations to develop potential recombinants through various breeding strategies. Genetic studies revealed the preponderance of additive gene action for days to flowering, days to maturity and harvest index, and non-additive gene action for the remaining six traits.

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COMBINING ABILITY IN RELATION TO HETEROSIS EFFECTS AND GENETIC DIVERSITY IN COTTON USING LINE X TESTER MATING DESIGN

PLANT ARCHIVES ◽

10.51470/plantarchives.2021.v21.no1.001 ◽

2021 ◽

Vol 21 (No.1) ◽

Author(s):

Max Mariz ◽

Reham Gibely ◽

Abdelmoghny AM

Keyword(s):

Genetic Diversity ◽

Combining Ability ◽

Gene Action ◽

Fiber Strength ◽

Fiber Quality ◽

Block Design ◽

Specific Combining Ability ◽

Lint Yield ◽

Gene Effects ◽

Additive Gene

The aim of this study was to investigate the relationship between specific combining ability, genetic diversity of parents and heterosis over better parent effects. This research, having eighteen F1 crosses derived from crossing between six lines and three testers, was conducted in order to estimate combining ability, to determine the nature of gene action and heterosis for yield and fiber quality traits and to detect the appropriate crosses for cotton breeding program. The experiment was conducted on randomized complete block design with three replications. The analyses of variance showed significant differences among the genotypes, parents (lines and testers) and crosses for all the studied traits. Estimates of both general and specific combining ability effects were significant for most traits, indicating the importance of both additive and non-additive gene effects for these traits. While, specific was higher than general combining ability variances, for all traits, showing non-additive gene action controlling and therefore, heterosis breeding may be rewarding. The heterosis value varied from cross to cross and from trait to trait. This dissimilarity coefficient was ranged from 3.234 between Giza 85 and Giza 80 to 71.002 between Giza 96 and 10229. Association between heterosis over better parent and specific combining ability was positive and significant for all the studied traits except lint yield / plant. No correlations were found between SCA and GD for all the studied traits. Similarly, heterosis effects was negatively significantly correlated with GD only in the case of boll weight, lint yield / plant and uniformity ratio %, while showed positive and significant correlation for fiber strength and micronaire value. Four crosses showed both positive and significant heterosis and specific combining ability for most yield traits. The parents of these crosses belong to different clusters. Crossing diverse parents could produce high heterotic performance in hybri

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Estimation of combining ability and gene action for yield and its components in pigeonpea [Cajanus cajan (L.) Millspaugh]

Indian Journal of Agricultural Research ◽

10.18805/ijare.a-4785 ◽

2017 ◽

Vol 51 (06) ◽

Author(s):

Rakesh Kumar Maida ◽

M. P. Patel ◽

Chandrabhan Ahirwar ◽

A. M. Patel

Keyword(s):

Seed Yield ◽

Combining Ability ◽

Gene Action ◽

Block Design ◽

Hybrid Breeding ◽

Additive Gene Action ◽

Randomized Block Design ◽

Diallel Mating Design ◽

Breeding Programmes ◽

Additive Gene

Twenty eight hybrids developed by utilizing eight parents in 8 x 8 diallel mating design excluding reciprocals were evaluated in randomized block design with three replications for twelve characters in order to understand the combining ability and gene action in pigeonpea. The analysis of variance for combining ability revealed presence of additive and non- additive gene action. The ratio of gca/sca variance was less than unity which indicated the preponderance of non- additive gene action for action in the control of pod length, harvest index, protein content and leaf area. The estimates of general combining ability suggested that parents ICPL-87119, GT-103 and AGT-2 were good general combiners for seed yield per plant and its attributing characters while, hybrids UPAS-120 x GT-103, BSMR-853 x BANAS and BSMR-853 x GT-1 showed the higher order sca effect for seed yield per plant. These cross combinations can be potentially utilized in hybrid breeding programmes.

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Combining Ability and Gene Action for Yield Improvement in Kenaf (Hibiscus Cannabinus L.) Under Tropical Conditions Through Diallel Mating Design

10.21203/rs.3.rs-1107040/v1 ◽

2021 ◽

Author(s):

Md Al-Mamun ◽

RAFII Y. MOHD. ◽

MISRAN AZIZAH ◽

BERAHIM ZULKARAMI ◽

AHMAD ZAITON ◽

...

Keyword(s):

Plant Height ◽

Combining Ability ◽

Gene Action ◽

Gene Effects ◽

Mating Design ◽

Diallel Mating Design ◽

Tropical Conditions ◽

Additive Gene ◽

Fibre Yield ◽

Diallel Mating

Abstract Nine morphologically distinct kenaf genotypes were hybridized to produce 36 hybrids following a half diallel mating design. The combining ability and gene action of 15 yield and yield components were assessed in hybrids and their parents across two environments. Except for the mid diameter and plant height traits, there were highly significant differences (p ≤ 0.01) between both the analysis of variance of environments and the interaction of genotype and environment. For the inheritance of these traits, additive gene effects were considerable, and the expression of these additive genes was heavily influenced by the environment. Significant differences were found for all studied traits for GCA except top diameter, and SCA except plant height and top diameter, implying the presence of both additive and non-additive gene action for the inheritance of the concerned characters. For all features except top diameter and number of nodes, the magnitude of GCA variation was significantly higher than that of SCA variance, indicating the additive gene's predominance. The parental lines P1, P3 and P4 were determined to be outstanding general combiners for fibre yield and yield-related parameters. Considering combining ability and genetic analysis study together, the crosses P1 × P4, P1 × P9, P2 × P3, P2 × P5, P4 × P6, P4 × P7, P4 × P9, P5 × P8, and P7 × P9 were found promising for their heterotic response to higher fibre yield, stick yield, seed yield and and could be useful by adopting proper strategies for future improvement in kenaf breeding programmes.

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Genetic analysis of physiological indicators of drought tolerance in bread wheat using diallel technique

Genetika ◽

10.2298/gensr1501107f ◽

2015 ◽

Vol 47 (1) ◽

pp. 107-118 ◽

Cited By ~ 6

Author(s):

Ezatollah Farshadfar ◽

Reza Amiri

Keyword(s):

Drought Tolerance ◽

Bread Wheat ◽

Analysis Of Variance ◽

Combining Ability ◽

Gene Action ◽

Block Design ◽

Additive Gene Action ◽

Gene Effects ◽

Chl A ◽

Additive Gene

In order to study genetic architecture of physiological criteria of drought tolerance in wheat using different diallel techniques, an experiment was conducted on six bread wheat genotypes as parents and their 15 hybrids in a randomized complete block design with three replicates under rainfed conditions at the Research Farm of the Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran during 2010- 2011 cropping season. The results of analysis of variance showed significant differences between the genotypes for relative water content (RWC), relative chlorophyll content (RCC), chlorophyll a (Chl a), chlorophyll b (Chl b), total chlorophyll (Chl T) and proline concentration (PC). RWC, Chl T and PC exhibited significant differences for general combining ability, indicating the involvement of additive gene action in their inheritance. Moreover, as specific combining ability was not significant for all studied traits, hence these traits are predominantly controlled by additive gene action. Parent number one was the best general combiner for improvement of RWC, RCC and Chl b, while the best general combiner for improvement of Chl a, Chl T and PC was parent number five. Also, the best specific combination for improvement of RWC, RCC, Chl a, Chl b, Chl T and PC were the crosses 2?4, 1?2, 3?6, 1?6, 1?6 and 1?4, respectively indicating that parents of these crosses are genetically varied. Hayman and Morley-Jones analysis of variance revealed that the inheritance of RWC, Chl a, Chl b, and Chl T was mainly controlled by additive gene effects, while PC was controlled by both additive as well as dominance type of gene action.

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Genetic parameters and combining ability of some important traits in rice (Oryza sativa L.)

Genetika ◽

10.2298/gensr1703001h ◽

2017 ◽

Vol 49 (3) ◽

pp. 1001-1014 ◽

Cited By ~ 1

Author(s):

Hasanalideh Haghighi ◽

Ezatollah Farshadfar ◽

Mehrzad Allahgholipour

Keyword(s):

Combining Ability ◽

Genetic Parameters ◽

Amylose Content ◽

Oryza Sativa L ◽

Block Design ◽

Regression Line ◽

Diallel Cross ◽

Combining Ability Analysis ◽

Additive Gene ◽

F2 Generation

In order to study the combining ability, genetic parameters and gene actions of yield, yield components and quality characters in rice, fifteen F2 generation of a 6?6 diallel cross, excluding reciprocals, was grown in a randomized complete block design (RCBD) with three replications. The results of analysis of variance showed significant differences between the genotypes for grain yield (GY), 100-grain weight (HGW), number of panicles per plant (PN), panicle length (PL), number of full grains per panicle (FGN) and for quality characters including amylose content (AC) and gel consistency (GC). The results of combining ability analysis revealed that general combining ability (GCA) and specific combining ability (SCA) were significant for characters GY, FGN, GC, AC, HGW and PN indicating the involvement of additive and non-additive effects in their inheritance, however high amounts of Bakers ratio remarked that additive gene effect had more portion in controlling these traits. The best combiners for GY, HGW, FGN, PN and PL, were RI18447-2, IR 50, Daylamani, RI18430-46 and Daylamani respectively. For AC and GC, the best combiner was Daylamani. Hayman's graphs showed that regression line passed below the origin cutting Wr axis in the negative region for HGW, PN, PL and GC, indicating the presence of over dominance. Estimates of genetic parameters showed significant amount of H1 and H2, and non-significant amount of D for the characters GY, PN, PL and GC, which confirmed the existence of dominance in the inheritance of these traits.

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The Effects of Combining Ability for Yield Traits in Rice (Oryza sativa L.) under Sodic Soil

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i1230661 ◽

2020 ◽

pp. 34-44

Author(s):

Durgesh Kumar Shukla ◽

S. N. Singh ◽

S. C. Gaur ◽

Anil Kumar

Keyword(s):

Combining Ability ◽

Gene Action ◽

Oryza Sativa L ◽

Hybrid Vigour ◽

Yield Traits ◽

Additive Gene Action ◽

Early Maturity ◽

Additive Gene ◽

Rice Genotypes ◽

Positive Effect

Information on combining ability is derived from data on twelve yield and yield contributing characters in fifteen male and three female parents utilised in line x tester fashion to estimate combining ability of rice genotypes under coastal saline condition. Forty Five hybrids generated from crossing three lines with fifteen testers were studied along with their parents for combining ability and gene action involved in the expression of characters in rice. The gca and sca effects were significant for all the characters. The magnitude of sca variance was higher than the gca variance for all the characters revealed the presence of predominance of non-additive gene action for all the characters under study. Halchal (-12.29) was found to be good general combiners for days to 50% flowering and early maturity, Halchal (-13.39). However, IR-24 (1.88) was good general combiners with significant positive effect for tallness. Magic (-12.05) good general combiners for dwarfness and Shriram 434 (1.57) was good general combiners for test weight however, Moti was best general combiner with gca estimates of 7.07 for harvest index and Kuber (3.48) was the good general combiners for yield/hill. Cross combinations RHR 27 x IR 24 (4.04) was significant and positive effect for yield/hill, performance for ear bearing tillers per plant were RHR 27 x IR 24 (1.88). In general, the crosses showing significant and desirable combining ability effects were associated with better per se performance for the respective traits. These hybrids could be utilized in heterosis breeding to exploit hybrid vigour.

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Combining ability and heritability of selected rice varieties for grain yield, its components and grain quality characters

Genetika ◽

10.2298/gensr1502559a ◽

2015 ◽

Vol 47 (2) ◽

pp. 559-570 ◽

Cited By ~ 1

Author(s):

Mehrzad Allahgholipour ◽

Ezatollah Farshdfar ◽

Babak Rabiei

Keyword(s):

Grain Yield ◽

Combining Ability ◽

Grain Quality ◽

Amylose Content ◽

Gelatinization Temperature ◽

Narrow Sense ◽

Rice Varieties ◽

Narrow Sense Heritability ◽

Head Rice ◽

Additive Gene

This study was conducted to determine the combining ability and heritability of rice grain yield, its components and some grain quality traits such as amylose content (AC), gelatinization temperature (GT), gel consistency (GC) and head rice recovery (HRR). The study was commenced by crossing the selected rice varieties based on a full diallel mating design. The F1 was harvested at the end of the season. In the following season, the crossed, reciprocal and parental lines were planted in randomly complete block design with three replications. Analysis of variance indicated that genotypes were significantly different for all traits. The diallel analysis by Griffing`s method showed highly significant differences for GCA for number of panicles per plant (PN), amylose content, gelatinization temperature and head rice recovery. Highly significant differences were also observed for both SCA and REC for all evaluated characters. The results showed that the grain yield (GY), number of filled grains (FGN), 100-grain weight (HGW) and GC were controlled by non-additive gene action, while the inheritance of PN, AC, GT and HRR were largely controlled by additive gene effects, although non- additive genetic components and reciprocal effect were also involved, which suggest that a selection process could be done in the early generations. The two improved lines (RI18442-1 and RI18430-46) were found to be good general combiners for GY and FGN, while the best combiners for PN was Tarom Mohali and IR50 and for HGW was RI18430-46. The best combinations for GY were RI18430-46 ? IR50, Tarom Mohali ? RI18447-2 and Daylamani ? RI18430-46. The good hybrids were Tarom Mohali ? IR50, Line23 ? RI18447-2 and Line23 ? Backcross line for AC. Narrow sense heritability showed that the GY and GC had the lowest values while the other traits had either moderate or high heritability, which indicates selection in the early generations could be done to fix the favorable genes. In present study, narrow sense heritability was high for AC and moderate for GT, PN and HRR.

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Combining Ability Analysis of Blast Disease Resistance and Agronomic Traits in Finger Millet [Eleusine coracana (L.) Gaertn]

Journal of Agricultural Science ◽

10.5539/jas.v8n11p138 ◽

2016 ◽

Vol 8 (11) ◽

pp. 138 ◽

Cited By ~ 1

Author(s):

Lawrence Owere ◽

Pangirayi Tongoona ◽

John Derera ◽

Nelson Wanyera

Keyword(s):

Disease Resistance ◽

Combining Ability ◽

Finger Millet ◽

Gene Action ◽

Agronomic Traits ◽

The Other ◽

Blast Disease ◽

Additive Gene Action ◽

Gene Effects ◽

Additive Gene

Blast disease is the most important biotic constraint to finger millet production. Therefore disease resistant varieties are required. However, there is limited information on combining ability for resistance and indeed other agronomic traits of the germplasm in Uganda. This study was carried out to estimate the combining ability and gene effects controlling blast disease resistance and selected agronomic traits in finger millet. Thirty six crosses were generated from a 9 × 9 half diallel mating design. The seed from the 36 F1 crosses were advanced by selfing and the F2 families and their parents were evaluated in three replications. General combining ability (GCA) for head blast resistance and the other agronomic traits were all highly significant (p ≤ 0.01), whereas specific combining ability (SCA) was highly significant for all traits except grain yield and grain mass head-1. On partitioning the mean sum of squares, the GCA values ranged from 31.65% to 53.05% for head blast incidence and severity respectively, and 36.18% to 77.22% for the other agronomic traits measured. Additive gene effects were found to be predominant for head blast severity, days to 50% flowering, grain yield, number of productive tillers plant-1, grain mass head-1, plant height and panicle length. Non-additive gene action was predominant for number of fingers head-1, finger width and panicle width. The parents which contributed towards high yield were Seremi 2, Achaki, Otunduru, Bulo and Amumwari. Generally, highly significant additive gene action implied that progress would be made through selection whereas non-additive gene action could slow selection progress and indicated selection in the later generations.

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