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https://www.readbyqxmd.com/read/29766351/comparative-whole-genome-re-sequencing-analysis-in-upland-new-rice-for-africa-insights-into-the-breeding-history-and-respective-genome-compositions
#1
Naoki Yamamoto, Richard Garcia, Tomohiro Suzuki, Celymar Angela Solis, Yuichi Tada, Ramaiah Venuprasad, Ajay Kohli
BACKGROUND: Increasing rice demand is one of the consequences of the steadily improving socio-economic status of the African countries. New Rice for Africa (NERICA), which are interspecific hybrids between Asian and African rice varieties, are one of successful breeding products utilizing biodiversity across the two different rice crop species. Upland NERICA varieties (NU) exhibit agronomic traits of value for the harsh eco-geography, including shorter duration, higher yield and stress tolerance, compared to local African varieties...
May 15, 2018: Rice
https://www.readbyqxmd.com/read/29748895/genomic-selection-of-agronomic-traits-in-hybrid-rice-using-an-ncii-population
#2
Yang Xu, Xin Wang, Xiaowen Ding, Xingfei Zheng, Zefeng Yang, Chenwu Xu, Zhongli Hu
BACKGROUND: Hybrid breeding is an effective tool to improve yield in rice, while parental selection remains the key and difficult issue. Genomic selection (GS) provides opportunities to predict the performance of hybrids before phenotypes are measured. However, the application of GS is influenced by several genetic and statistical factors. Here, we used a rice North Carolina II (NC II) population constructed by crossing 115 rice varieties with five male sterile lines as a model to evaluate effects of statistical methods, heritability, marker density and training population size on prediction for hybrid performance...
May 10, 2018: Rice
https://www.readbyqxmd.com/read/29744685/outgrowth-of-rice-tillers-requires-availability-of-glutamine-in-the-basal-portions-of-shoots
#3
Miwa Ohashi, Keiki Ishiyama, Soichi Kojima, Noriyuki Konishi, Kazuhiro Sasaki, Mitsue Miyao, Toshihiko Hayakawa, Tomoyuki Yamaya
BACKGROUND: Our previous studies concluded that metabolic disorder in the basal portions of rice shoots caused by a lack of cytosolic glutamine synthetase1;2 (GS1;2) resulted in a severe reduction in the outgrowth of tillers. Rice mutants lacking GS1;2 (gs1;2 mutants) showed a remarkable reduction in the contents of both glutamine and asparagine in the basal portions of shoots. In the current study, we attempted to reveal the mechanisms for this decrease in asparagine content using rice mutants lacking either GS1;2 or asparagine synthetase 1 (AS1)...
May 9, 2018: Rice
https://www.readbyqxmd.com/read/29725869/genetic-analysis-of-male-sterility-obtained-from-a-rice-cultivar-lebed-backcrossed-with-taichung-65
#4
Tetsuya Murakami, Tomohiko Kazama, Kinya Toriyama
BACKGROUND: Male sterility is a useful agronomic trait for breeding of self-pollinating crops and is often observed in the progenies of hybrids of distantly related species, for example, Oryza sativa L. subsp. indica and O. sativa L. subsp. japonica. To explore new male sterile lines in rice, we performed successive backcrosses using a japonica cultivar Taichung 65 (T65) as a recurrent pollen parent and various indica cultivars as the initial female parents. FINDINGS: We observed male sterile plants in the backcross progeny from an indica cultivar, Lebed...
May 3, 2018: Rice
https://www.readbyqxmd.com/read/29691670/correction-to-genetic-diversity-of-arsenic-accumulation-in-rice-and-qtl-analysis-of-methylated-arsenic-in-rice-grains
#5
Masato Kuramata, Tadashi Abe, Akira Kawasaki, Kaworu Ebana, Taeko Shibaya, Masahiro Yano, Satoru Ishikawa
The authors of article "Genetic diversity of arsenic accumulation in rice and QTL analysis of methylated arsenic in rice grains" (Kuramata et al. 2013) would like to note that the original version of the article online unfortunately contains the following errors.
April 24, 2018: Rice
https://www.readbyqxmd.com/read/29687350/genome-wide-analyses-of-late-pollen-preferred-genes-conserved-in-various-rice-cultivars-and-functional-identification-of-a-gene-involved-in-the-key-processes-of-late-pollen-development
#6
Sunok Moon, Moe Moe Oo, Backki Kim, Hee-Jong Koh, Sung Aeong Oh, Gihwan Yi, Gynheung An, Soon Ki Park, Ki-Hong Jung
BACKGROUND: Understanding late pollen development, including the maturation and pollination process, is a key component in maintaining crop yields. Transcriptome data obtained through microarray or RNA-seq technologies can provide useful insight into those developmental processes. Six series of microarray data from a public transcriptome database, the Gene Expression Omnibus of the National Center for Biotechnology Information, are related to anther and pollen development. RESULTS: We performed a systematic and functional study across the rice genome of genes that are preferentially expressed in the late stages of pollen development, including maturation and germination...
April 23, 2018: Rice
https://www.readbyqxmd.com/read/29679239/comparative-analysis-of-the-root-transcriptomes-of-cultivated-and-wild-rice-varieties-in-response-to-magnaporthe-oryzae-infection-revealed-both-common-and-species-specific-pathogen-responses
#7
Lei Tian, Shaohua Shi, Fahad Nasir, Chunling Chang, Weiqiang Li, Lam-Son Phan Tran, Chunjie Tian
BACKGROUND: Magnaporthe oryzae, the causal fungus of rice blast disease, negatively impacts global rice production. Wild rice (Oryza rufipogon), a relative of cultivated rice (O. sativa), possesses unique attributes that enable it to resist pathogen invasion. Although wild rice represents a major resource for disease resistance, relative to current cultivated rice varieties, no prior studies have compared the immune and transcriptional responses in the roots of wild and cultivated rice to M...
April 20, 2018: Rice
https://www.readbyqxmd.com/read/29679176/a-versatile-vector-toolkit-for-functional-analysis-of-rice-genes
#8
Feng He, Fan Zhang, Wenxian Sun, Yuese Ning, Guo-Liang Wang
BACKGROUND: Rice (Oryza sativa) is the main food for half of the world's population, and is considered the model for molecular biology studies of monocotyledon species. Although the rice genome was completely sequenced about 15 years ago, the function of most rice genes is still unknown. RESULTS: In this study, we developed a vector toolkit that contains 42 vectors for transient expression studies in rice protoplasts and stable expression analysis in transgenic rice...
April 20, 2018: Rice
https://www.readbyqxmd.com/read/29671148/identification-of-a-cold-tolerant-locus-in-rice-oryza-sativa-l-using-bulked-segregant-analysis-with-a-next-generation-sequencing-strategy
#9
Jian Sun, Luomiao Yang, Jingguo Wang, Hualong Liu, Hongliang Zheng, Dongwei Xie, Minghui Zhang, Mingfang Feng, Yan Jia, Hongwei Zhao, Detang Zou
BACKGROUND: Cold stress can cause serious abiotic damage that limits the growth, development and yield of rice. Cold tolerance during the booting stage of rice is a key factor that can guarantee a high and stable yield under cold stress. The cold tolerance of rice is controlled by quantitative trait loci (QTLs). Based on the complex genetic basis of cold tolerance in rice, additional efforts are needed to detect reliable QTLs and identify candidate genes. In this study, recombinant inbred lines (RILs) derived from a cross between a cold sensitive variety, Dongnong422, and strongly cold-tolerant variety, Kongyu131, were used to screen for cold-tolerant loci at the booting stage of rice...
April 18, 2018: Rice
https://www.readbyqxmd.com/read/29671092/finding-the-superior-allele-of-japonica-type-for-increasing-stem-lodging-resistance-in-indica-rice-varieties-using-chromosome-segment-substitution-lines
#10
Indria Wahyu Mulsanti, Toshio Yamamoto, Tadamasa Ueda, Ahmad Fahim Samadi, Eri Kamahora, Indrastuti Apri Rumanti, Vo Cong Thanh, Shunsuke Adachi, Sakae Suzuki, Motoki Kanekatsu, Tadashi Hirasawa, Taiichiro Ookawa
BACKGROUND: In cereal crops, stem lodging can be classified into two types: stem-breaking type and stem-bending type. To improve stem-lodging resistance, the strong culm traits of superior lodging-resistant varieties must be characterized. The identification of quantitative trait loci (QTLs) and the corresponding genes associated with the parameters for bending moment at breaking (M) and flexural rigidity (FR) is expected to enable the efficient development of lodging-resistant varieties...
April 18, 2018: Rice
https://www.readbyqxmd.com/read/29651780/sub-cellular-markers-highlight-intracellular-dynamics-of-membrane-proteins-in-response-to-abiotic-treatments-in-rice
#11
Thi Thu Huyen Chu, Thi Giang Hoang, Duy Chi Trinh, Charlotte Bureau, Donaldo Meynard, Aurore Vernet, Mathieu Ingouff, Nang Vinh Do, Christophe Périn, Emmanuel Guiderdoni, Pascal Gantet, Christophe Maurel, Doan-Trung Luu
BACKGROUND: Cell biology approach using membrane protein markers tagged with fluorescent proteins highlights the dynamic behaviour of plant cell membranes, not only in the standard but also in changing environmental conditions. In the past, this strategy has been extensively developed in plant models such as Arabidopsis. RESULTS: Here, we generated a set of transgenic lines expressing membrane protein markers to extend this approach to rice, one of the most cultivated crop in the world and an emerging plant model...
April 12, 2018: Rice
https://www.readbyqxmd.com/read/29644569/evaluation-and-breeding-application-of-six-brown-planthopper-resistance-genes-in-rice-maintainer-line-jin-23b
#12
Haichao Jiang, Jie Hu, Zhi Li, Jia Liu, Guanjun Gao, Qinglu Zhang, Jinghua Xiao, Yuqing He
BACKGROUND: The brown planthopper (BPH), an insect species that feeds on rice plants (Oryza sativa L.), is one of the most destructive insect pests of rice. BPH can be controlled with chemical pesticides, but they are expensive in terms of the cost and environmental hazards. Hence, utilization of resistance genes in resistant varieties is considered as a more economical and eco-friendly effective method for control. RESULTS: In this study, six dominant BPH-resistance genes (Bph3, Bph14, Bph15, Bph18, Bph20 and Bph21) were introduced into an elite indica rice cultivar Jin 23B using the marker-assisted selection (MAS) method of breeding...
April 11, 2018: Rice
https://www.readbyqxmd.com/read/29637380/improving-rice-grain-length-through-updating-the-gs3-locus-of-an-elite-variety-kongyu-131
#13
Jianzong Nan, Xiaomin Feng, Chen Wang, Xiaohui Zhang, Rongsheng Wang, Jiaxin Liu, Qingbo Yuan, Guoqiang Jiang, Shaoyang Lin
BACKGROUND: Traditional crop breeding has made significant achievement meet food needs worldwide. However, the way has some inevitable problems including time-consuming, laborious, low predictability and reproducibility. In this study, we updated the GRAIN SIZE 3 (GS3) locus to improve the grain length of a major cultivate variety of Kongyu 131 at Heilongjiang Province, the northernmost region of China. High-resolution melting (HRM) analysis is used for single nucleotide polymorphism (SNP) genotyping...
April 10, 2018: Rice
https://www.readbyqxmd.com/read/29633040/thai-hom-mali-rice-origin-and-breeding-for-subsistence-rainfed-lowland-rice-system
#14
REVIEW
Apichart Vanavichit, Wintai Kamolsukyeunyong, Meechai Siangliw, Jonaliza L Siangliw, Suniyom Traprab, Siriphat Ruengphayak, Ekawat Chaichoompu, Chatree Saensuk, Ekapol Phuvanartnarubal, Theerayut Toojinda, Somvong Tragoonrung
The world-renowned Thai Hom Mali Rice has been the most important aromatic rice originating in Thailand. The aromatic variety was collected from Chachoengsao, a central province, and after pure-line selection, it was officially named as Khao Dawk Mali 105, (KDML105). Because of its superb fragrance and cooking quality, KDML105 has been a model variety for studying genes controlling grain quality and aroma. The aromatic gene was cloned in KDML105, as an amino aldehyde dehydrogenase (AMADH) or better known as BADH2 located on chromosome 8...
April 9, 2018: Rice
https://www.readbyqxmd.com/read/29629488/pusa-basmati-1121-a-rice-variety-with-exceptional-kernel-elongation-and-volume-expansion-after-cooking
#15
REVIEW
Vijaipal Singh, Ashok Kumar Singh, Trilochan Mohapatra, Gopala Krishnan S, Ranjith Kumar Ellur
Pusa Basmati 1121 (PB 1121) is a landmark Basmati rice variety having Basmati quality traits introgressed from traditional Basmati varieties such as Basmati 370 and Type 3. It was released for commercial cultivation in 2003. It possesses extra-long slender milled grains (9.00 mm), pleasant aroma, and an exceptionally high cooked kernel elongation ratio of 2.5 with a cooked kernel length of up to 22 mm, volume expansion more than four times, appealing taste, good mouth feel and easy digestibility. Owing to its exceptional quality characteristics, it has set new standards in the Basmati rice market...
April 9, 2018: Rice
https://www.readbyqxmd.com/read/29629486/koshihikari-a-premium-short-grain-rice-cultivar-its-expansion-and-breeding-in-japan
#16
REVIEW
Asako Kobayashi, Kiyosumi Hori, Toshio Yamamoto, Masahiro Yano
Koshihikari, a Japanese short-grain rice cultivar, was developed in 1956, more than 60 years ago. Despite its age, it has been the most widely grown cultivar in Japan for more than 35 years, making it the most important rice for the Japanese people. In its early days, there was no reason to predict that Koshihikari would become so widely disseminated. However, since the end of the post-World War II food shortage in the 1960s, Japanese preferences changed from high productivity to good eating quality. This triggered wide expansion of Koshihikari cultivation due to the cultivar's excellent taste and texture...
April 9, 2018: Rice
https://www.readbyqxmd.com/read/29629479/ir64-a-high-quality-and-high-yielding-mega-variety
#17
REVIEW
David J Mackill, Gurdev S Khush
High-yielding varieties developed in the 1960s and 1970s at the International Rice Research Institute (IRRI) and elsewhere benefited farmers and the public, ultimately increasing yields and reducing the cost of rice to consumers. Most of these varieties, however, did not have the optimum cooking quality that was possessed by many of the traditional varieties they replaced. In 1985, the IRRI-developed indica variety IR64 was released in the Philippines. In addition to its high yield, early maturity and disease resistance, it had excellent cooking quality, matching that of the best varieties available...
April 9, 2018: Rice
https://www.readbyqxmd.com/read/29629478/shanyou-63-an-elite-mega-rice-hybrid-in-china
#18
REVIEW
Fangming Xie, Jianfu Zhang
Hybrid rice has been successfully used for commercial rice production for 40 years in China. Shanyou 63, a mega rice hybrid, derived from the parents Zhenshan 97A and Minghui 63, was a milestone for China's hybrid rice development and production because of its high yield and wide adaptability. It was planted in 16 provinces of the country on 17% of the national hybrid rice area annually during the 29 years from 1984 to 2012. The hybrid and its parents have also been widely used for basic and agronomic studies related to rice heterosis, stress tolerance, molecular markers and genomics...
April 9, 2018: Rice
https://www.readbyqxmd.com/read/29629475/special-issue-iconic-rice-varieties
#19
EDITORIAL
David J Mackill
No abstract text is available yet for this article.
April 9, 2018: Rice
https://www.readbyqxmd.com/read/29532187/heat-stress-induces-spikelet-sterility-in-rice-at-anthesis-through-inhibition-of-pollen-tube-elongation-interfering-with-auxin-homeostasis-in-pollinated-pistils
#20
Caixia Zhang, Guangyan Li, Tingting Chen, Baohua Feng, Weimeng Fu, Jinxiang Yan, Mohammad Rezaul Islam, Qianyu Jin, Longxing Tao, Guanfu Fu
BACKGROUND: Pollen tube elongation in the pistil is a key step for pollination success in plants, and auxins play an important role in this process. However, the function of auxins in pollen tube elongation in the pistil of rice under heat stress has seldom been previously reported. RESULTS: Two rice genotypes differing in heat tolerance were subjected to heat stress of 40 °C for 2 h after flowering. A sharp decrease in spikelet fertility was found in the Nipponbare (NPB) and its mutant High temperature susceptible (HTS) under heat stress, but the stress-induced spikelet sterility was reversed by 1-naphthaleneacetic acid (NAA), especially the HTS...
March 12, 2018: Rice
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