Studies on Choice of Parents and Gene Action in Rice Hybrids Involving Yield and Physiological Traits under Aerobic Condition

Sathya, R.

doi:10.5376/pgt.2010.01.0019

Cited by 2 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This showed the presence of greater variance of non-additive gene action for all the characters, which offer scope for exploitation of hybrid vigour through heterosis breeding and selection procedure in late or advanced generation will be very important to improve these traits. These results were in agreement with those reported by Hosseini et al (2005) and Malarvizhi et al (2010) for spad chlorophyll meter reading and dry shoot weight in rice, Gnanasekaran et al (2006) for biomass yield in rice, Das et al (2005) for relative water content in rice; Ganesh et al (2004), Sathya and Jebaraj (2013) and Utharasu and Anandakumar (2013) for dry root weight and root/shoot ratio in rice. The GCA effects represent the nature of gene action.…”

Section: Resultssupporting

confidence: 90%

“…The hybrids viz., ADT (R) 49 x Chinnar 20, ADT 43 x Anna (R) 4, ADT 36 x Anna (R) 4, BPT 5204 x Chinnar 20, CO (R) 50 x Nootripathu and CO (R) 50 x PMK (R) 3 were also found to be specific combiners. Similar results were obtained by Sathya and Jebaraj (2013) for the traits 70 percent relative water content, dry root weight, dry shoot weight and root length in rice. For these combinations, since they involved non-additive gene action, cyclic method of breeding involving selection of desired recombinants and their inter crossing would be more desirable (Muthuramu et al, 2010).…”

Section: Resultssupporting

confidence: 85%

See 1 more Smart Citation

Combining ability and heterosis analysis for drought tolerant traits in rice (Oryza sativa L.)

Karpagam¹,

Jebaraj

Rajeswari

2016

JANS

View full text Add to dashboard Cite

Rice is the most important staple food for more than half of the worldâ€™s population and also for most of the countries. A Line x Tester analysis was undertaken to study the nature of gene action for yield and drought tolerant traits. The ratio of SCA and GCA was less than unity for all the characters which revealed that the preponderance of non- additive gene action governing the traits concerned. The lines viz., ADT 43, ADT (R) 49, CO (R) 50 and the testers viz., PMK (R) 3, Chandikar and Anna (R) 4 were adjudged as the best general combiners for drought tolerant traits. The cross combinations viz., ADT 39 x Vellaichitraikar had exhibited significant values for dry root weight (9.66), root/shoot ratio (0.31), root length (3.82), number of roots per plant (37.08), root thickness (0.11), root volume (4.27) and root length density (0.03) ADT (R) 49 x Chandikar for 70 percent relative water content (8.85), dry root weight (18.03), dry shoot weight (40.55), root length (3.10), number of roots per plant (140.16) root thickness (0.38) and root volume (23.14) were found to be specific combiners for most of the drought tolerant traits. The cross combinations, viz., ADT 43 x Anna (R) 4, ADT (R) 49 x Chandikar and ADT 43 x PMK (R) 3 had highly significant standard heterosis. Breeding for drought tolerance in rice would be of immense value to the farmers economic health, family well-being and harmony in the society.

show abstract

Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 85%

Combining ability and heterosis analysis for drought tolerant traits in rice (Oryza sativa L.)

Karpagam¹,

Jebaraj

Rajeswari

2016

JANS

View full text Add to dashboard Cite

show abstract

“…Because the parent groups were genetically different, it appears that the SCA was mainly attributable to the difference between the allele frequencies in the parent groups, as the heterosis in the F 2 generation was reduced to half its initial value. However, the absence of dominance is unlikely, as the occurrence in rice of both additive and nonadditive factors (dominance and epistasis) has been reported in several studies (Rutger et al, 1986;Pereira et al, 2008;Sathya and Jebaraj, 2013), although the relationship between these effects is highly dependent on inbreeding (Cockerham, 1963).…”

Section: Gene Action and Combining Abilitymentioning

confidence: 99%

Gene Action and Combining Ability for Certain Agronomic Traits in Red Rice Lines and Commercial Cultivars

et al. 2017

View full text Add to dashboard Cite

1295RESEARCH P roduction and consumption of white rice (Oryza sativa L.) are prevalent in the world, although the original pigmentation of the pericarp of all rice species is red. The white pericarp, a colorless phenotype, is determined by the rc allele that originated from a loss-of-function mutation at the Rc locus on chromosome 7 in Oryza rufipogon Griffiths-a wild relative of cultivated rice. The red coloration, in turn, is determined by the complementary effect of two genes, Rc and Rd, each one inherited monogenically. The original dominant allele (Rc) interacts with the Rd allele on chromosome 1 to synthesize the proanthocyanidin compound that determines red pericarp pigmentation in rice grains. Specifically, the Rc allele that encodes the basic helix-loop-helix (bHLH) protein is responsible for the accumulation of pigments in the pericarp of brown-colored grains, whereas the Rd allele that encodes the dihydroflavonol-4-reductase (DFR) enzyme is required to increase the content of the pigment, resulting in redcolored grains (Nagao et al., 1957;Furukawa et al., 2007).ABSTRACT Cultivated red rice (Oryza sativa L.) is the most important special type of rice in Brazil and makes an excellent food, mainly because of its nutritional value. Genetic variability, useful for rice breeding programs, exists among red rice accessions. The objectives of the present study were: (i) to determine the nature of gene action and magnitude of genetic components conditioning grain yield (GY), plant height (PH), and days to flowering (DTF); and (ii) to determine the combining ability for these traits in nine red rice lines (female parents) and four commercial cultivars (male parents). Thirteen parents, an F 2 generation of 18 crosses, and a check cultivar were evaluated at two locations (Goianira and Teresina, Brazil) using a randomized complete block design with four replications. Data (unbalanced because of lost plots) from this incomplete set of crosses in a factorial mating design were subjected to variance analyses using a general linear model. According to Baker's ratio, nonadditive genetic effects were more important than additive effects for the expression of the three traits. The dominance deviations were predominantly negative for GY and DTF and were positive for PH.

show abstract

Studies on Choice of Parents and Gene Action in Rice Hybrids Involving Yield and Physiological Traits under Aerobic Condition

Cited by 2 publications

References 1 publication

Combining ability and heterosis analysis for drought tolerant traits in rice (Oryza sativa L.)

Combining ability and heterosis analysis for drought tolerant traits in rice (Oryza sativa L.)

Gene Action and Combining Ability for Certain Agronomic Traits in Red Rice Lines and Commercial Cultivars

Contact Info

Product

Resources

About