Differentiation and classification of parental lines and favorable genic interactions affecting F1 fertility in distant crosses of rice (Oryza sativa L.)

1998 ◽  
Vol 96 (3-4) ◽  
pp. 526-538 ◽  
Author(s):  
R. H. Li ◽  
C. G. Xue ◽  
L. P. Yuan ◽  
Y. Q. He ◽  
C. Q. Sun ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Parental Lines

Prediction of hybrid performance based on the genetic distance of parental lines in two-line rice (Oryza sativa L.) hybrids

2011 ◽  
Vol 14 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Vikas Kumar Singh ◽  
Priti Upadhyay ◽  
Pallavi Sinha ◽  
Ashish Kumar Mall ◽  
Ranjith K. Ellur ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Genetic Distance ◽  
Oryza Sativa L ◽  
Hybrid Performance ◽  
Parental Lines

scholarly journals Combining ability and heterosis prediction for grain yield of parental lines and hybrids for heat tolerance in rice (Oryza sativa L.)

2017 ◽  
Vol 12 (Special-5) ◽  
pp. 1213-1221
Author(s):  
N. SRAVAN RAJU ◽  
P. SENGUTTUVEL ◽  
A.S. HARI PRASAD ◽  
P. BEULAH ◽  
P. NAGANNA ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Heat Tolerance ◽  
Combining Ability ◽  
Oryza Sativa L ◽  
Heterosis Prediction ◽  
Parental Lines

scholarly journals The Effect of Degree of Milling on the Nutraceutical Content in Ecofriendly and Conventional Rice (Oryza sativa L.)

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1297
Author(s):  
Seung-Hyun Kim ◽  
Yu-Jin Yang ◽  
Ill-Min Chung
Keyword(s):  
Oryza Sativa ◽  
Antioxidant Activities ◽  
Oryza Sativa L ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Brown Rice ◽  
Stepwise Discriminant Analysis ◽  
Rice Grains ◽  
Degree Of Milling

We investigated the effects of the type of rice and degree of milling (DOM) on the nutraceutical content and antioxidant activity of rice (Oryza sativa L.). The fatty acid (FA), vitamin E homolog, and phenolic contents in organic (OR), pesticide-free (PFR), and conventional rice (CR) decreased significantly with an increase in the DOM of rice grains, particularly for a DOM of 7 and 9 (p < 0.05). The 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity also decreased with the DOM; particularly, this activity decreased significantly, by approximately 60%, in rice grains with a DOM between 7 and 11, as compared to that of brown rice (p < 0.05). α-Tocopherol (r = 0.854) and p-coumaric acid (r = 0.501) showed the strongest correlation with DPPH activity in each chemical group. Stepwise discriminant analysis enabled the correct original and cross-validated classification of 87.0% and 81.5% of rice types, respectively. Additionally, the original and cross-validated classification of rice DOM levels showed that, overall, 93.8% and 92.6% of rice samples were correctly classified. Our findings reveal variations in the nutraceutical levels and antioxidant activities in rice grains based on the rice type and DOM, which can help improve the nutritional evaluation of human-health-promoting rice grains.

scholarly journals Identification of a Novel QTL for Chlorate Resistance in Rice (Oryza sativa L.)

Agriculture ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 360 ◽  
Author(s):  
Nkulu Rolly Kabange ◽  
So-Yeon Park ◽  
Dongjin Shin ◽  
So-Myeong Lee ◽  
Su-Min Jo ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Candidate Genes ◽  
Phenotypic Variation ◽  
Oryza Sativa L ◽  
In Silico Analysis ◽  
Parental Line ◽  
Chlorate Resistance ◽  
Specific Pcr ◽  
Significant Difference ◽  
Parental Lines

Chlorate resistance analysis is an effective approach commonly used to distinguish the genetic variation between Oryza sativa L. ssp. indica and japonica, and predict the nitrogen use efficiency (NUE). This study aimed at investigating the response of a doubled haploid (DH) population derived from anther culture of 93-11 × Milyang352 exposed to 0.1% potassium chlorate (KClO3) at the seedling stage. The results revealed that the parental rice lines 93-11 (indica) and Milyang352 (japonica) showed distinctive phenotypic responses. The parental line 93-11 scored highly sensitive (0% survival) and Milyang352 scored resistant (66.7% survival) 7 days after treatment. The DH lines reflected the differential phenotypic response observed in parental lines. Interestingly, we identified a novel quantitative trait locus (QTL) for chlorate resistance on chromosome 3 (qCHR-3, 136 cM, logarithm of the odds—LOD: 4.1) using Kompetitive Allele-Specific PCR (KASP) markers. The additive effect (−11.97) and phenotypic variation explained (PVE; 14.9%) indicated that the allele from Milyang352 explained the observed phenotypic variation. In addition, shoot growth showed a significant difference between parental lines, but not root growth. Moreover, in silico analysis identified candidate genes with diverse and interesting molecular and physiological functions. Therefore, this study suggested that the QTL qCHR-3 harbors promising candidate genes that could play a role in the regulation of nitrogen metabolism in rice.

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