Rice Breeding

Guimarães, E. P.

doi:10.1007/978-0-387-72297-9_2

Cited by 31 publications

(34 citation statements)

References 35 publications

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“…to narrowing the genetic base of cultivated rice, with a consequent increase in crop vulnerability (Guimarães, 2009;Nadaf et al, 2016). The increase in GY potential becomes more difficult because the actual genetic differences between cultivars are becoming ever smaller.…”

Section: Effectiveness Of Recurrent Selection In Irrigated Rice Breedingmentioning

confidence: 99%

Effectiveness of Recurrent Selection in Irrigated Rice Breeding

et al. 2017

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Plant breeding for quantitative traits is a complicated task; thus, the recurrent selection method has been used in the rice (Oryza sativa L.) breeding program at the Brazilian Agricultural Research Corporation (Embrapa). Our general objective was to assess the effectiveness of this method in achieving genetic progress, maintaining genetic variability, and increasing the potential for selection of superior lines. A genetically broad‐based population of irrigated rice, CNA12S, submitted to three selection cycles was used in this study. The dataset comprised 10 yield trials, in which 667 S1:3 progenies and six check cultivars were assessed for grain yield, plant height, and days to flowering. We measured effective population size in each cycle, using standard and linkage disequilibrium methods, and Nei's genetic diversity in the third cycle. Such analyses were performed using data of single‐nucleotide polymorphism markers from progenies of the third cycle. For estimating the genetic gain, we adapted a generalized linear regression method to the Bayesian approach. This approach was also used to estimate variance and covariance components, according to the multivariate linear mixed model. Magnitudes of genetic and relative variation coefficients, as well as Nei's genetic diversity, indicated maintenance of genetic variability over cycles. Mean genetic gain per year was 1.98% for grain yield and −1.29% for days to flowering. Genetic potential of the population for extraction of superior lines was increased, considering single‐, two‐, or three‐trait selection. Our results show the effectiveness of the recurrent selection method when applied in rice breeding, although some refinements in the selection strategy could further improve its efficiency.

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Section: Effectiveness Of Recurrent Selection In Irrigated Rice Breedingmentioning

confidence: 99%

Effectiveness of Recurrent Selection in Irrigated Rice Breeding

et al. 2017

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“…Mutagenesis approaches using chemicals or irradiation have been greatly used to diversify grain yield and quality in rice (MO et al, 2013). Gamma rays are the most popular mutagen and the mutated traits are responsible for the expression of agronomic, grain quality, pests and disease resistance and phenotypes (GUIMARAES, 2009). Food and Agriculture Organization of the United Nation (FAO) and International Atomic Eenergy Agency (IAEA) mutant varieties database indicates that there were 2541 released mutant cultivars, up to March 2007.…”

Section: Introductionmentioning

confidence: 99%

“…Food and Agriculture Organization of the United Nation (FAO) and International Atomic Eenergy Agency (IAEA) mutant varieties database indicates that there were 2541 released mutant cultivars, up to March 2007. The largest numbers are from cereals (1212), which rice presented the highest number (525) (GUIMARAES, 2009).…”

Section: Introductionmentioning

confidence: 99%

Genetic variation for grain yield, yield components and qualitative traits in rice (Oryza sativa L.) mutants

Sharifi¹

2019

Genetika

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Sharifi P. (2019): Genetic variation for grain yield components and qualitative trait in rice (Oryza sativa L.) mutants. Vol 51, No.3,[829][830][831][832][833][834][835][836][837][838][839][840][841][842][843] A study was performed to select the most successful rice mutants and to estimate the heritability of grain yield and some agro-morphological and quality traits. 65 rice genotypes including four local landraces (Hashemi, Tarom, Alikazemi and Sangjo), four released cultivars (Khazar, Fajr, H.P and Sephidrod) and 57 mutant lines (M5) were studied. The experiment was carried out during the spring of 2013-14 at Rice Research Institute of Iran (RRII) in Rasht. Analysis of variance indicated significant effects of genotype on all of the traits. Higher genotypic (GCV) and phenotypic coefficient of variation (PCV) were obtained for number of unfilled grains and grain yield. In general, very narrowly differences between PCV and GCV indicated fewer influence of environment on all of the studied traits. Broad sense heritability and genetic advance over mean were high for panicle weight, panicles per plant, number of filled grains, number of unfilled grains and grain yield. The high genetic advance over mean coupled with moderate to high heritability suggested the importance of additive gene action for the above mentioned traits. Mutant TM6-B-7-1 had high grain yield, panicles per plant, plant height, spikelets per panicle, panicle weight and hundred grain weights and can be used for future breeding programs to incorporate these characters in local genotypes.

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“…Grain yield has been steadily increasing since the 1940s due to breeding e orts focusing on high-yielding cultivars and on improvements in crop husbandry [2,3]. Quality of rice is of increasing interest.…”

Section: Introductionmentioning

confidence: 99%

Quality and Grain Yield Attributes of Rwandan Rice (Oryza sativaL.) Cultivars Grown in a Biotron Applying Two NPK Levels

Mukamuhirwa

Hovmalm

Ortíz

et al. 2018

Journal of Food Quality

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High-yielding rice cultivars with good processing quality and rich in nutrition suitable to a changing climate are of particular importance for future rice-based food production. Here, seven Rwandan rice cultivars were grown in a climate chamber of the biotron facility at the Swedish University of Agricultural Sciences, to be evaluated for their grain yield, nutritional composition, and dough mixing properties. Two di erent levels of inorganic fertilizer were applied weekly from the seedling stage until owering. Signi cant di erences for grain yield and quality attributes were found between cultivars. Jyambere showed signi cantly the highest yield while Ingwizabukungu, Nemeyubutaka, and Jyambere were high in mineral elements content. Ndamirabahinzi and Mpembuke had the highest levels of TPC and TAC. Generally, the lower fertilizer dose resulted in a better performance of the cultivars for both yield and quality attributes. Signi cantly higher content of Fe, Ca, and Ba was found in grains from the moderate fertilizer dose, whereas K, Na, P, S, Zn, Cd, and Pb increased in grains from the higher fertilizer dose. e cultivar Ndamirabahinzi showed less variability of evaluated characters across fertilizer doses. e results from this study may be used for rice breeding of cultivars with high yield and good grain quality.

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Rice Breeding

Cited by 31 publications

References 35 publications

Effectiveness of Recurrent Selection in Irrigated Rice Breeding

Effectiveness of Recurrent Selection in Irrigated Rice Breeding

Genetic variation for grain yield, yield components and qualitative traits in rice (Oryza sativa L.) mutants

Quality and Grain Yield Attributes of Rwandan Rice (Oryza sativaL.) Cultivars Grown in a Biotron Applying Two NPK Levels

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