COMBINING ABILITY AND HETEROSIS ESTIMATES FROM LINE X TESTER MATING DESIGN UNDER WATER STRESS CONDITIONS IN RICE (Oryza sativa L.)

Hassan, Heba A.; Hammoud, S. A. A.; Elmoghazy, A. M.; El-Abd, A. B.

doi:10.21608/jpp.2012.85374

Cited by 4 publications

(7 citation statements)

References 13 publications

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“…The results suggest that improvement in these traits may be obtained via heterosis breeding or by single plant selection in later segregating generations following hybridization or intermating of selected segregants through recurrent selection. Similar results also were reported previously by Basbag et al (2007), Viswanathan and Thiyagarajan, (2008), Hassan et al (2013) and Zeinab Montazeri1 et al (2014), they exhibited that high magnitude of specific combining ability (SCA) variance revealed the predominance of non-additive gene action for all characters, viz., duration (day), plant height, number of productive tillers/plant, panicle length, number of unfilled grains/panicle, spikelet fertility %, 100-grain weight and grain yield/plant, which offer scope for exploitation of hybrid vigor through heterosis breeding.…”

Section: -Inheritance Of Quantitative Traits: Analysis Of Variance Fsupporting

confidence: 88%

“…Hence, these hybrids are expected to produce desirable segregants and could be exploited successfully in breeding programs. Similar findings were reported earlier by Pradhan, et al (2006), El Abd, et al (2007, Basbag, et al (2007), Sarma, et al (2007, Viswanathan Satheesh andThiyagarajan (2008), Muthurama, et al (2010), Hassan et al (2013) and Zeinab Montazeri1 et al (2014).…”

Section: Specific Combining Ability Effectssupporting

confidence: 85%

“…four rice crosses exhibited highly significant and positive heterosis, when it was measured as a deviation from mid-parent for spikelet fertility %, the highest estimated value was recorded on Sakha 102 X IRBL3-CP4 (11.48%), on the other hand, no heterobeltiosis were recorded for spikelet fertility % in all the studied crosses. Similar results were reported by several scientists such as, Khoyumthem, et al (2005), Basbag, et al (2007), El Abd, et al (2007, Ganapathy and Ganesh (2008), Amudha, et al (2010), Muthuramu, et al (2010, Hassan et al (2013) andZeinab Montazeri1 et al (2014).…”

Section: Estimates Of Heterosis and Heterobeltiosissupporting

confidence: 84%

“…Similar results were obtained previously by Soroush andMoumeni (2006). El Abd, et al (2007), Viswanathan satheesh and Thiyagarajan (2008), Muthuramu, et al (2010), Hassan et al (2013) andZeinab Montazeri1 et al (2014).…”

Section: Estimates Of General and Specific Combining Ability Effects mentioning

confidence: 99%

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Identifying the Genes of Blast Resistance in Rice (Oryza sativa L.) Using Line X Tester Analysis

El-Malky

Hassan

Metwali

et al. 2016

Journal of Plant Production

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The present study investigation was carried out at the Experimental Farm of Rice Research and Training Center (RRTC), Sakha, Kafr El-Sheikh, Egypt, during the three successive growing seasons of 2014, 2015 and 2016. Four rice genotypes namely; Sakha 101, Sakha 102, Sakha103 and Sakha 104 were used as Lines and four monogenic lines; i.e., IRBLKS-S, IRBL3-CP4, IRBL5-M and IRBL7-M, were used as Testers, which cried blast resistance genes Pik-s, Pi3, Pi5(t) and Pi7(t). Under field condition, the results showed that the varieties Sakha 102 and Sakha 103 were resistant to blast under the three locations, Sakha, Gemmiza and Zarzoura. On the contrary, the other two Egyptian varieties Sakha 101 and Sakha104 were susceptible. Moreover, the monogenic lines (IRBLKS-S, IRBL3-CP4, IRBL5-M and IRBL7-M) were blast resistant under natural infection conditions. On the other hand, under five artificial inoculations races IA-77, IG-1, ID-15, IC-17 and IB-45 of Magnaporthe grisea, the results revealed that Sakha 102 and Sakha 103 variety were resistant to all races, except IB-45 race, which were susceptible. While, the two Egyptian varieties, Sakha 101 and Sakha 104 were susceptible to blast of the five races. For monogenic rice genotypes, results showed that IRBLKS-S, IRBL3-CP4 and IRBL5-M which carried (Pik-s, Pi3 and Pi5) blast resistance genes were resistant to all races, except EG-5 race, which were susceptible and the other rice monogenic line IRBL7-M which carry Pi7(t) was resistant against IG-1, 367 and 374 races and susceptible under EG-5 and IB-45 races of M. grisea. The results also suggested that the six major genes; Pi-i, Pi-sh, Pik-s, Pi3, Pi5, Pi7 (t) were effective under Egyptian conditions and can be used for improving blast resistance character in breeding program. The results of the inheritance of blast resistance using sixteen F 1 and F 2 rice populations showed that all F 1 s were resistant to blast. Among the F 2 segregating generation eight populations showed resistant and non-segregation ratio, four rice crosses gave segregations 15 resistant (R) : 1 susceptible (S), while the segregating ratio of another four crosses were 3 R : 1 S for blast. In addition, the analysis of variance revealed significant differences among genotypes, lines, testers and line x tester interactions for blast reaction, duration, plant height, panicle length and weight, flag leaf area, number of panicles/plant and primary branches/panicle, 1000-grain weight and spikelet fertility % traits, indicated that the genotypes had wide genetic diversity for the studied traits. However, significant differences due to interactions of line x tester for the above mentioned traits, indicating the importance of both additive and non-additive gene action in the inheritance of these traits. Highly significant and desirable heterosis and heterobeltiosis were recorded in Sakha 103 X IRBL5-M for improving blast resistance, plant height, flag leaf area, number of panicles/plant and spikelet fertility %. In addition, Sakha 102 X IRBLKS-S rice hybrid was the...

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Section: -Inheritance Of Quantitative Traits: Analysis Of Variance Fsupporting

confidence: 88%

Section: Specific Combining Ability Effectssupporting

confidence: 85%

Section: Estimates Of Heterosis and Heterobeltiosissupporting

confidence: 84%

Section: Estimates Of General and Specific Combining Ability Effects mentioning

confidence: 99%

See 2 more Smart Citations

Identifying the Genes of Blast Resistance in Rice (Oryza sativa L.) Using Line X Tester Analysis

El-Malky

Hassan

Metwali

et al. 2016

Journal of Plant Production

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“…However, the non-additive gene action was predominant for days to heading, number of panicles/ plant, panicle weight, panicle length and grain yield (Abd El-Hadi et al, 2013 andHasan et al, 2015). While, the additive gene action appeared to be more important in the genetic expression of rice grain yield and some of its contributing traits (Hassan et al, 2012). The present investigation aimed to study the genetic variance components, heritability, heterosis and combining ability in relation to identify desirable parents and hybrids for hybrid rice breeding program.…”

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confidence: 97%

Genetic Analysis of Some Quantitative Traits in Hybrid Rice with Utilizing Cytoplasmic Genetic Male Sterility System

2016

Egypt. J. Agron.

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HE PRESENT investigation was conducted to study the genetic variance components, heritability, heterosis and combining ability in relation to identifying desirable parents and hybrids for hybrid rice breeding program. Three cytoplasmic male sterile (CMS) lines and five restorers (testers) were crossed in line × tester scheme in 2014 growing season. The resulted 15 F 1 hybrids along with their eight parents, three maintainers lines and one standard check variety (Giza 178) were evaluated in a randomized complete block design (RCBD) with three replications at Rice Research and Training Center (RRTC) Farm, Sakha, Kafrelsheikh, Egypt during 2015 growing season. Data were recorded on eight quantitative traits, i.e. days to heading, plant height , panicle length, 1000-grain weight, panicle weight, the number of panicles/plant, spikelet fertility percentage and grain yield. The results showed that, the mean squares due to genotypes, parents, crosses and parents vs. crosses were highly significant for all the studied traits. Highly significant differences were detected among lines, testers and line × tester for all the studied traits. The nonadditive genetic variance played an effective role in the inheritance of all studied traits, except days to heading, plant height and panicle weight. Heritability estimates in the broad sense (h 2 b %) were high for all the studied traits. However, heritability estimates in the narrow sense (h 2 n %) were moderate to high for some traits. Relatively high genetic advance coupled with high heritability estimates were detected for panicle weight. Highly significant and positive estimates of heterosis over better parent and the check variety (Giza 178) were detected in all the F 1 hybrids for the grain yield trait. The CMS line G46A and the restorers GZ9399 and PR6 were the best general combiners for grain yield. The hybrid combinations viz., IR69625A × Giza179, IR69625A × PR5, IR70368A × GZ9399, IR70368A × WTR1 and G46A × PR5 had the best SCA effects for grain yield and some of its components.Rice (Oryza sativa L.) is the main food crop for over one-half of the world's human population (Yuan, 2014). Rice plays a significant role in Egypt strategy for sustaining the food self-sufficiency and for increasing the export. By the year T G. B. ANIS et al.

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YIELD POTENTIAL OF NOVEL RICE GENOTYPES, AND EFFECT OF Trichogramma RELEASE AND BLAST RESISTANCE ON RICE PRODUCTIVITY

El-Habashy¹,

El-Shafey²,

Anis³

et al. 2015

Journal of Plant Protection and Pathology

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Rice is a vital food crop for about one-half of the global population. Unfortunately, it suffers from some biotic and abiotic stresses, which negatively affect the yield potential. Rice plants, in Egypt, are subject to infestation with several insect pests, but the most destructive one is the rice stem borer, Chilo agamemnon Bles. In addition, rice blast remains the most serious disease to manage. Blast resistance has consistently been one of the most important objectives of rice breeders in Egypt. The current investigation was conducted at the experimental farm of Rice Research and Training Center, Sakha Agricultural Research Station during 2014 and 2015 rice seasons. The objectives were to find out the efficiency of Trichogramma release in controlling the rice stem borer compared with insecticide, and to identify some novel resistant and high yielding varieties with high broad spectrum of blast resistance and high level of tolerance to stem borer infestation. Seventeen genotypes were evaluated under both natural and artificial inoculation for blast. Also, yield and yield attributes of these genotypes were estimated. The results revealed that all japonica genotypes were resistant or moderately resistant to the stem borer while indica and indica japonica genotypes were almost susceptible to the stem borer. The release of Trichogramma twice, each at a rate of 30,000 individuals /feddan, the first release was ten days before maximum tillering, and the second one was at 20% flowering. The release of this egg-parasitoid reduced the borer infestation, overall the 17 genotypes, by 78-80% white heads, and was relatively more efficient than the application of the recommended insecticide (Furadan at a rate of 6 kg /feddan). Consequently, Trichogramma, as eco-friendly application, could be used as an alternative management for stem borer than insecticide. Blast nursery evaluation revealed that all japonica GZ lines were highly resistant, as well as high yielding, such as GZ10364-22-3-1-2 and GZ10365-2-4-1-2. Under artificial inoculation with specific and virulent blast races, all genotypes were resistant to all aggressive races except Sakha 101 that was susceptible Till now, the genotypes,

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COMBINING ABILITY AND HETEROSIS ESTIMATES FROM LINE X TESTER MATING DESIGN UNDER WATER STRESS CONDITIONS IN RICE (Oryza sativa L.)

Cited by 4 publications

References 13 publications

Identifying the Genes of Blast Resistance in Rice (Oryza sativa L.) Using Line X Tester Analysis

Identifying the Genes of Blast Resistance in Rice (Oryza sativa L.) Using Line X Tester Analysis

Genetic Analysis of Some Quantitative Traits in Hybrid Rice with Utilizing Cytoplasmic Genetic Male Sterility System

YIELD POTENTIAL OF NOVEL RICE GENOTYPES, AND EFFECT OF Trichogramma RELEASE AND BLAST RESISTANCE ON RICE PRODUCTIVITY

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