Maximum Outcrossing Rate and Genetic Compatibility between Red Rice (Oryza sativa) Biotypes and Clearfield™ Rice

Shivrain, Vinod K.; Burgos, Nilda R.; Gealy, David R.; Moldenhauer, K. A. K.; Baquireza, Cecilia J.

doi:10.1614/ws-08-026.1

Cited by 41 publications

(45 citation statements)

References 32 publications

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“…Controlled crossing performed with a commercial HR tropical japonica inbred cultivar and 12 U.S. weedy red rice types revealed no major barriers to hybridization, with seed set ranging from 70 to 94% for 10 of the 12 types and all of the BH types (Shivrain et al 2008). In a companion experiment in the field in which the red rice flowering overlapped with rice, outcrossing rates were as high as 0.25% (Shivrain et al 2008).…”

Section: Resultsmentioning

confidence: 91%

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Outcrossing Potential between U.S. Blackhull Red Rice and Indica Rice Cultivars

et al. 2015

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Weedy red rice is a major weed pest of rice in the southern United States. Outcrossing between red rice and commercial tropical japonica rice cultivars has resulted in new weed biotypes that further hinder the effectiveness of weed management. In recent years, indica rice has been used increasingly as a germplasm source for breeding and for reduced-input systems in the United States, but little is known about its outcrossing potential with U.S. weedy red rice biotypes. In a 2-yr study, simple sequence repeat marker analysis was used to show that blackhull (BH) red rice (PI 653424) outcrossing to four, late-maturing indica cultivars averaged 0.0086% and ranged from 0.002% for ‘TeQing’ to 0.0173% for ‘4484’ (PI 615022). Rates of outcrossing to a tropical japonica cultivar standard, ‘Kaybonnet’ (0.032%), were substantially greater than for the indica cultivars. These differences in outcrossing were due largely to synchronization of flowering times between rice and red rice, with Kaybonnet and TeQing exhibiting the greatest and least synchronization, respectively. Outcrossing rates also may have been affected by rice–red rice flower density differences within the rice plots. Outcrossing from cultivated rice to the red rice (as pollen recipient), which was taller than all rice cultivars, was undetectable in these studies, and environmental conditions (e.g., temperature, humidity, solar radiation, and rainfall) were not strongly correlated with the outcrossing rates observed. Grain yields of the original BH red rice line were greatest in the Kaybonnet plots, demonstrating that the indica cultivars were superior competitors against this weed. Collectively, these results suggest that red rice biotypes that flower synchronously with rice cultivars are a potential source of pollen for outcrossing and gene flow in rice fields in the southern United States.

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Section: Resultsmentioning

confidence: 91%

“…In a companion experiment in the field in which the red rice flowering overlapped with rice, outcrossing rates were as high as 0.25% (Shivrain et al 2008).…”

Section: Resultsmentioning

confidence: 99%

Outcrossing Potential between U.S. Blackhull Red Rice and Indica Rice Cultivars

et al. 2015

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“…The CL rice cultivars used in these experiments were CL161 and CLXL8, which were imazethapyr-resistant conventional and hybrid rice, respectively. Twelve red rice biotypes were used in these experiments, collected in the summer of 2002 and 2003 from 10 counties (Shivrain et al 2008) and grown in 10 replications for seed increase at Stuttgart in 2003 and2004. In all replications, the red rice plants had the same phenotypic characteristics as the parent plant (Shivrain 2004). For each red rice biotype, seeds from 10 replications were bulked and a subsample of red rice seeds was used.…”

Section: Methodsmentioning

confidence: 99%

Red Rice (Oryza sativa) Emergence Characteristics and Influence on Rice Yield At Different Planting Dates

et al. 2009

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Cultivated rice yield losses due to red rice infestation vary by cultivar, red rice density, and duration of interference. The competition effects of red rice could be influenced further by emergence characteristics, red rice biotype, and planting time of cultivated rice. We aimed to characterize the emergence of red rice biotypes at different planting dates and evaluate the effect of red rice biotype, rice cultivar, and planting date on cultivated rice yield loss. Field experiments were conducted at the Southeast Research and Extension Center, Rohwer, AR, and at the Arkansas Rice Research and Extension Center, Stuttgart, AR, in the summer of 2005 and 2006. The experimental design was a split-split plot with three or four replications. Planting time, ClearfieldTM(CL) rice cultivar, and red rice biotype were the main plot, subplot, and sub-subplot factors, respectively. There were three planting times from mid-April to mid-May at 2-wk intervals. CL rice cultivars, CL161 and hybrid CLXL8, and 12 red rice biotypes were planted. The emergence rate and coefficient of uniformity of germination differed among some red rice biotypes within a planting time. Planting date affected the emergence characteristics of red rice biotypes. The mean emergence rate of red rice was 0.043 d−1in the mid-April planting and 0.058 d−1in the late April planting. For the mid-April planting, 50% of red rice biotypes emerged in 20 ± 2 d compared with 15 ± 2 d for CL rice cultivars. Yield losses due to red rice biotypes generally increased in later planting dates, up to 49%. Yield losses due to interference from red rice biotypes ranged from 14 to 45% and 6 to 35% in CL161 and CLXL8, respectively. Cultivated rice became less competitive with red rice in later plantings, resulting in higher yield losses.

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“…(Copsemar, SCL). Its commercialization is expected in the near future, although the ecological concerns about the rapid resistance transmission to weedy rice reported (Shivrain et al 2008;Kaloumenos et al 2013;Goulart et al 2012).…”

Section: Introductionmentioning

confidence: 99%

A Mediterranean japonica rice (Oryza sativa) cultivar improvement through anther culture

et al. 2013

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Certified seed producers systematically select and propagate registered varieties year after year in order to maintain their uniformity and the original registered cultivar traits. However, natural mutations, spontaneous breeding between varieties and alien grain contamination can introduce undesirable variability. NRVC 980385 is a temperate japonica rice cultivar (Oryza sativa ssp. japonica) first registered in Spain in 2002. In 2005 certification tests detected a plot differing from the original traits in terms of uniformity and height suggesting the presence of a certain heterozygosis. This material was therefore seen as an opportunity to obtain newly stabilized doubled haploid (DH) lines which could compete in the Spanish short grain seed market. In this study, an in vitro anther culture protocol is defined which also covers the field tests selection to obtain four new, improved and stabilized DH derived lines ready to be registered for commercial proposes. This took just four years from the initial anther collection until new lines were grown in large scale field trials. Consequently, this protocol reduces the time for obtaining field assessed DH lines thereby having considerable advantages over other techniques by both maintaining the original registered cultivars and/or generating new derived varieties.

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Maximum Outcrossing Rate and Genetic Compatibility between Red Rice (Oryza sativa) Biotypes and Clearfield™ Rice

Cited by 41 publications

References 32 publications

Outcrossing Potential between U.S. Blackhull Red Rice and Indica Rice Cultivars

Outcrossing Potential between U.S. Blackhull Red Rice and Indica Rice Cultivars

Red Rice (Oryza sativa) Emergence Characteristics and Influence on Rice Yield At Different Planting Dates

A Mediterranean japonica rice (Oryza sativa) cultivar improvement through anther culture

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