Combining Ability and Gene Action in Hybrid Rice

Ramesh, C.

doi:10.18782/2320-7051.5199

Cited by 8 publications

(8 citation statements)

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“…In the current study, it was observed that GCA variances were greater than SCA variances for the majority of the characters, indicating the predominance of additive gene action for the traits like Plant height, panicle length, panicle weight, number of grains per panicle, spikelet fertility percent, 1000 grain weight, kernel length, kernel breadth and kernel length-breadth ratio. The findings of Pratap et al, (2013); Samrath andDeepak, 2014 andRamesh et al, (2018) support the present results of predominance of additive positive gene action for majority of traits. The SCA variances were greater than the GCA variances for the number of productive tillers per plant, pollen fertility percent, hulling percentage, milling percentage, head rice recovery and grain yield per plant, indicating predominance of non-additive gene action.…”

Section: Resultssupporting

confidence: 88%

Studies on gene action and combining ability in rice (Oryza sativa. L) hybrids

2022

EJPB

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The study was carried out to learn about the nature of gene action and combining ability in rice hybrids for grain yield and its component traits. For this, eight lines were crossed with four testers in an L x T mating design. The analysis of variance revealed significant variance for all the characters studied among the parents and hybrids. GCA variances were higher than SCA variances for most of the characters, indicating the predominance of additive gene action, while SCA variances were higher than GCA variances for number of productive tillers per plant, pollen fertility, hulling, milling, head rice recovery and grain yield per plant, indicating the predominance of non-additive gene action. The testers JMS 13A (3.91) and CMS 59A (2.46), as well as the lines MTU 1153 (9.52), RNR 28355 (3.26) and RNR 26085 (3.09), were the best combiners for grain yield and important yield components due to positive GCA effects. Based on SCA effects and corresponding mean performance for grain yield and its component traits, the hybrids CMS 59Ax RNR 26015, CMS 23A x JGL 25960, CMS 64Ax RNR 26015 and JMS 13Ax MTU 1153 were identified as the best specific combiners. These hybrids could be tested in multi-environment trials for commercial use.

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Section: Resultssupporting

confidence: 88%

Studies on gene action and combining ability in rice (Oryza sativa. L) hybrids

2022

EJPB

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“…This shows the significance for the success of these characteristics of additives and nonadditive genetic variances. These results were similar to those reported by Ramesh et al (2018), who revealed that significant GCA and SCA showed the significance for the expression of the yield traits in rice genotypes of additive and non-additive gene behavior.…”

Section: Analysis Of Variance and Mean Performancesupporting

confidence: 91%

“…Thus selection may be performed on the basis of mean output or GCA effects on similar productivity in order to boost economic characteristics in rice. Many investigators found significant GCA effects in positive direction for these traits in many rice genotypes under both conditions, As for Ramesh et al . ( 2018) who found that substantial additive and nonadditive gene effects for the expression of yield features in the genotypes of rice were described as important as GCA and SCA.…”

Section: General Combining Abilitymentioning

confidence: 78%

Evaluation of Combining Ability and Heterosis for Yield and Its Components Traits of Rice under Normal Irrigation and Drought Stress Conditions تقییم القدرة على التآلف وقوة الهجین للمحصول ومکوناته فی الأرز تحت ظروف الری الطبیعی والجفاف

El–Hadi

El–Adl

Draz

et al. 2020

Journal of Agricultural Chemistry and Biotechnology

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During 2010 and 2011seasons, two field experiments of rice experimental farm of Sakha, Kafr El-Sheïkh, Egypt, were performed through a 6 x 6 diallel system analysis to investigation the combining ability and heterosis and their component features of rice under normal irrigation and drought stress conditions.A broad range of genetic variation among research genotypes was indicated by the routine analysis of variance. As for all the features of normal irrigation and drought stress conditionsThe significance of non-additive genetic variation in the heritage of grain yield / plant has been established by GCA / SCA ratios. While the selection based on the accumulation of the additive effect will boost yield and assign it successfully. According to drought susceptibility index (DSI), four parents and six crosses were the lowest genotypes affected by drought.GCA shows all parental lines are intrinsically performing with a strong index of their overall ability to blend. The combinations of IR7887-176-B-2-B X IR80508-B-194-1-B to boost the output of grain per plant was the best possible cross, as reported by SCA.Under drought, the highest values significant for heterosis from better parent, five crosses for panicle length and seven crosses for number of branches / panicles and grain yield characters. In the general sense, higher heritability levels emerged in normal irrigation; genotypic variances played a major part in phonotypical yield variances and their components.Lower and moderate heritage tests for all yields and their components showed that selection for these characteristics would be successful in late generations.

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“…Zewdu (2020) found that analysis of variance indicated that genotypes, general combining and specific combining abilities mean square values were highly significant (p ≤ 0.001) for all measured traits which indicated the genetic diversity of the parents and the importance of both additive and non-additive gene effects in the inheritance of the measured traits respectively. The estimate of variance due to GCA was higher than that due to SCA for these traits suggesting greater importance of additive genetic variance which is in agreement with the results of Lathaet al, (2013), Ramesh et al, (2018), El Mowafi and AbouShousha (2003), Negm, (2012) and El Mowafi et al, (2019and 2022.…”

Section: 2general Combining Abilitysupporting

confidence: 89%

Combining Ability and Heterosis Studying for Yield and its Attributes of Hybrid Rice Under Normal and Salinity Conditions Using Line × tester Scheme

Ibrahim,

EL-Gammaal,

Zayed

et al. 2024

Journal of Sustainable Agricultural and Environmental Sciences

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The present investigation was conducted under normal and salinity conditions during the two rice successive seasons of 2020 and 2021. Three CMS lines of rice, IR69625A, G46A and GAB-A were used as female parents. In addition, four Egyptian tester lines viz., Giza179, PR5, PR6 and GZ9399 were used as testers beside their twelve F1 crosses. A randomized complete block design with three replications was used and the data were analyzed according to line × tester design. The results indicated highly significant differences among genotypes, parents, crosses and parents vs. crosses under the two environments (normal and salinity conditions).The results showed that dominance genetic variance (σ²D) was greater than additive genetic variance for Plant height, Number of panicles/plant, Spikelet fertility %, 1000-grain weight, Grain yield/plant, sodium content and potassium content under normal and salinity conditions, Panicle weight under salinity condition, indicating that non-additive gene action played an important role in the inheritance of this trait. For heterosis over the mid-parents (H.M.P.%): The most desirable hybrids; For grain yield plant-1, the highly values and highly significant heterosis based on midparents for grain yield plant-1 were observed for the crosses GAB-A/PR5, GAB-A/PR6, GAB-A/GZ9399, G46A/GZ9399, G46A/PR6 and G46A/PR6 under both conditions. The following genotypes could use in breeding program and expected improvement in such traits under normal and saline condition, G46A, PR6, GZ9399, Giza179 and GAB-A as a good donor. G46A/PR6, G46A/PR5, GAB-A/ PR6 and IR69625A/Giza179 could use as good crosses.

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Combining Ability and Gene Action in Hybrid Rice

Cited by 8 publications

References 0 publications

Studies on gene action and combining ability in rice (Oryza sativa. L) hybrids

Studies on gene action and combining ability in rice (Oryza sativa. L) hybrids

Combining Ability and Heterosis Studying for Yield and its Attributes of Hybrid Rice Under Normal and Salinity Conditions Using Line × tester Scheme

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