Characterization of Spontaneous Crosses between Clearfield Rice (Oryza sativa) and Red Rice (Oryza sativa)

2006 ◽  
Vol 20 (3) ◽  
pp. 576-584 ◽  
Author(s):  
Vinod K. Shivrain ◽  
Nilda R. Burgos ◽  
Karen A. K. Moldenhauer ◽  
Ronald W. Mcnew ◽  
Tomilea L. Baldwin
Keyword(s):  
Oryza Sativa ◽  
Agronomic Traits ◽  
Red Rice ◽  
Leaf Pubescence ◽  
Seed Shattering ◽  
Wide Range ◽  
Clearfield Rice ◽  
Pubescence Color ◽  
Seed Characteristics

Experiments were conducted to determine the inheritance of resistance in crosses between imazethapyr-resistant rice and red rice. Past experiments on red rice control, using the Clearfield rice technology, resulted in outcrossing between Clearfield rice and Stuttgart strawhull red rice. The F2 generation of these spontaneous crosses were characterized with respect to inheritance of imazethapyr resistance, leaf color and leaf pubescence, and seed shattering, pubescence, color, and size. Agronomic traits of hybrids were also observed in relation to their parents. To determine the segregation of resistance among F2 phenotypes, the response of three- to four-leaf plants to imazethapyr was scored 3 wk after application as resistant (R, no imazethapyr symptoms), susceptible (S, death of plants), or intermediate (I, stunted plants). R, I, and S phenotypes segregated in a 1:2:1 ratio in the F2 generation. Two- or three-gene inheritance was documented for leaf and seed characteristics. A wide range in onset of flowering (70 to 130 d after planting) was observed in F2 families, although 6% of the plants did not flower during the growing season. F2 plants were taller and had more tillers than any of their parents. Resistance to imazethapyr is associated with a single, incompletely dominant allele.

scholarly journals Performance of the agronomic traits of six advanced promising lines of red rice (oryza sativa l.) grown on the paddy field

2021 ◽  
Vol 681 (1) ◽  
pp. 012033
Author(s):  
G R Sadimantara ◽  
E Febrianti ◽  
LO Afa ◽  
S Leomo ◽  
Muhidin ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Paddy Field ◽  
Agronomic Traits ◽  
Oryza Sativa L ◽  
Red Rice

Red Rice (Oryza sativa) Biology. I. Characterization of Red Rice Ecotypes

1999 ◽  
Vol 13 (1) ◽  
pp. 12-18 ◽  
Author(s):  
José A. Noldin ◽  
James M. Chandler ◽  
Garry N. McCauley
Keyword(s):  
Flag Leaf ◽  
Natural Hybridization ◽  
Rice Cultivars ◽  
Red Rice ◽  
Cultivated Rice ◽  
Seed Shattering ◽  
Seed Moisture ◽  
Biology I ◽  
Plant Characteristics

Plant characteristics of red rice ecotypes obtained from Arkansas, Louisiana, Mississippi, and Texas, including 11 strawhulled, five blackhulled, two goldhulled, and one brownhulled type, were evaluated under field conditions. Most ecotypes were uniform and stable but manifested considerable genetic variability. Red rice plants had pubescent leaves, were taller with lighter green color, and produced more tillers and panicles per plant than rice cultivars ‘Lemont,’ ‘Mars,’ and ‘Maybelle.’ Most ecotypes were highly susceptible to seed shattering starting about 14 d after anthesis when seed moisture was more than 25%. Seeds of most ecotypes were highly dormant at harvest. Rice cultivars had a larger flag leaf and more total leaf area per plant at anthesis and produced more seeds per panicle than red rice. Some red rice ecotypes had plant characteristics closely related to cultivated rice suggesting natural hybridization with rice.

Risk assessment of the transfer of imazethapyr herbicide tolerance from Clearfield rice to red rice (Oryza sativa)

Euphytica ◽  
2006 ◽  
Vol 152 (1) ◽  
pp. 75-86 ◽  
Author(s):  
Weiqiang Zhang ◽  
Steven D. Linscombe ◽  
Eric Webster ◽  
Siyuan Tan ◽  
James Oard
Keyword(s):  
Risk Assessment ◽  
Oryza Sativa ◽  
Herbicide Tolerance ◽  
Red Rice ◽  
Clearfield Rice

Inheritance of herbicide resistance in two germplasm lines of Clearfield* rice (Oryza sativa L.)

2007 ◽  
Vol 87 (3) ◽  
pp. 659-669 ◽  
Author(s):  
Ida Wenefrida ◽  
Herry S Utomo ◽  
Mona M Meche ◽  
Jennifer L Nash
Keyword(s):  
Oryza Sativa ◽  
Herbicide Resistance ◽  
Oryza Sativa L ◽  
Nuclear Gene ◽  
Red Rice ◽  
Resistance Level ◽  
Herbicide Resistant ◽  
Resistant Gene ◽  
Clearfield Rice ◽  
Imidazolinone Resistance

Inheritance of imidazolinone resistance in two germplasms of Clearfield rice lines, 93AS3510 and PWC-16, was studied using parents, F1 hybrids, F2 populations , and F2:3 families. Germination tests were conducted in Petri dishes under controlled environments to reveal any discrete phenotypic responses to herbicide treatments. PWC-16 has a herbicide resistance level 4.9 times higher than that of 93AS3510. A concentration of 1 mg L-1 a.i. (active ingredient) of imazethapyr herbicide produced three distinctive response types in 93AS3510 crosses, while a concentration of 10 mg L-1 was required to differentiate the three response types in PWC-16 crosses. The segregation of the herbicide-resistant gene from both Clearfield rice lines fit into the Mendelian 1:2:1 (susceptible:intermediate:resistant) ratio. There was no maternal effect associated with the inheritance of the trait. The imidazolinone resistance, therefore, is governed by a single incomplete dominant nuclear gene. The F1 hybrid from a cross between resistant and non-resistant lines will produce resistant plants. Clearfield rice provides an effective use of imidazolinone herbicides to control red rice, the most troublesome weed of rice, along with other rice weeds. Preventing transfer of the herbicide-resistant gene into red rice is crucial to maintain its effectiveness. Key words: Rice, Oryza sativa, imazethapyr, herbicide resistance, imidazolinone, incomplete dominance, heritability

scholarly journals Chemical characterization of the antioxidant, antihyperglycemic and antihypertensive capacities of red rice (Oryza sativa L.) whole flour

2020 ◽  
Vol 47 (2) ◽  
pp. 238-246
Author(s):  
Andréa dos Anjos Silva ◽  
Marcus Vinicius da Silva Ferreira ◽  
Rafael Hydalgo Passeri Lima ◽  
José Lucena Barbosa Junior ◽  
Luiz Beja Moreira Moreira ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Chemical Characterization ◽  
Red Rice

scholarly journals The performance of agronomic traits, genetic variability, and correlation studies for yield and its components in some red rice (Oryza sativa) promising lines

2021 ◽  
Vol 22 (9) ◽  
Author(s):  
Gusti Ray Sadimantara ◽  
Dewi Nurhayati Yusuf ◽  
Eka Febrianti ◽  
Sitti Leomo ◽  
Muhidin MUHIDIN
Keyword(s):  
Oryza Sativa ◽  
Genetic Variability ◽  
Grain Yield ◽  
Coefficient Of Variation ◽  
Agronomic Traits ◽  
Grain Weight ◽  
Red Rice ◽  
Panicle Length ◽  
Thousand Grain Weight ◽  
Correlation Studies

Abstract. Sadimantara GR, Yusuf DN, Febrianti E, Leomo S, Muhidin. 2021. The performance of agronomic traits, genetic variability, and correlation studies for yield and its components in some red rice (Oryza sativa) promising lines. Biodiversitas 22: 3994-4001. Improving a new variety commonly depends on the nature and magnitude of genetic variability and its utilization, followed by selection and evaluation before being released into new superior types. The present study aims to estimate the genetic variability and relation between yield and its related traits of the red rice promising lines. The experiment was arranged based on a randomized complete block design (RCBD) with three replications. Analysis of variance revealed significant differences among rice lines for 12 quantitative traits. The phenotypic coefficient of variation (PCV) value was higher than the genotypic coefficient of variation (GCV), indicating a negligible environmental influence in the phenotypic expression of traits. High heritability estimates coupled with high genetic advance were recorded for grain total per panicle and grain yield per hill. Grain yield observed a highly significant positive correlation with panicle length (0.63), percentage of filled grains (0.53), grain weight per panicle (0.54), and thousand-grain weight (0.52). It correlated negatively with days to 50% flowering (-0.61) and days to maturity (-0.48). The study indicated that panicle length, percentage of filled grains, grain weight per panicle, and thousand-grain weight are important yield-related traits and could be used for selection to improve the genetic potential of rice yield.

Spread of herbicide-resistant weedy rice (red rice, Oryza sativa L.) after 5 years of Clearfield rice cultivation in Italy

Plant Biology ◽  
2012 ◽  
Vol 14 (5) ◽  
pp. 751-759 ◽  
Author(s):  
M. Busconi ◽  
D. Rossi ◽  
C. Lorenzoni ◽  
G. Baldi ◽  
C. Fogher
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Rice Cultivation ◽  
Weedy Rice ◽  
Red Rice ◽  
Herbicide Resistant ◽  
Clearfield Rice

scholarly journals Platinum-grade soybean reference genome facilitates characterization of genetic underpinnings of traits

2020 ◽  
Author(s):  
Xinxin Yi ◽  
Jing Liu ◽  
Shengcai Chen ◽  
Hao Wu ◽  
Min Liu ◽  
...  
Keyword(s):  
Reference Genome ◽  
De Novo ◽  
Agronomic Traits ◽  
Genomic Analysis ◽  
Comparative Genomic ◽  
High Quality ◽  
Wide Range ◽  
Breeding Research ◽  
High Quality Genome

Abstract BackgroundCultivated soybean (Glycine max) is an important source for protein and oil. Each soybean strain has its own genetic diversity, and the availability of more soybean genomes may enhance comparative genomic analysis of soybean.ResultsIn this study, we constructed a high-quality de novo assembly of an elite soybean cultivar Jidou 17 (JD17) with high contiguity, completeness, and accuracy. We annotated 59,629 gene models and reconstructed 235,109 high-quality full-length transcripts. We have molecularly characterized the genotypes of some important agronomic traits of JD17 by taking advantage of these newly established genomic resources.ConclusionsWe reported a high-quality genome and annotations of a wide range of cultivars, and used them to analyze the genotypes of genes related to important agronomic traits of soybean in JD17. We have demonstrated that high-quality genome assembly can serve as a valuable reference for soybean genomics and breeding research community.

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