Yield Potential and Physiological and Morphological Characteristics Related to Yield Performance in<i>Oryza glaberrima</i>Steud.

Futakuchi, Koichi; Sié, Moussa; Saito, Kazuki

doi:10.1626/pps.15.151

Cited by 24 publications

(13 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These aus ‐type cultivars might have favorable alleles for stresses, as they have been grown in harsh environments. As these stresses are also common in Africa, intensive screening of aus ‐type cultivars in Africa could help in identifying new genes and developing new cultivars rather than mainly focusing on O. glaberrima (Futakuchi et al, 2012). However, aus ‐type cultivars have been considered to have poor plant characteristics (e.g., Chin et al, 2010), such as propensity to lodge in high‐yielding environments and so‐called grain‐shattering.…”

Section: Discussionmentioning

confidence: 99%

“…These results suggest that the use of the two cultivars with greater biomass accumulation, harvest index, nutrient uptake, and use efficiency is critical for improving rice yield. such as weed-suppressive ability and resistance to African diseases, with the yield potential of tropical japonica parents ( Jones et al, 1997;Futakuchi et al, 2012). Cultivars derived from these crosses that performed well were named New Rice for Africa (NERICA).…”

Section: Plant Characteristics Of High-yielding Upland Rice Cultivarsmentioning

confidence: 99%

“…In the 1990s, scientists at the West Africa Rice Development Association now the Africa Rice Center (AfricaRice), initiated an approach to increase the yield of upland rice through the development of interspecific cultivars from wide crosses between O. sativa L. (improved tropical japonica ) and O. glaberrima Steud. The idea was to combine specific assets of O. glaberrima , such as weed‐suppressive ability and resistance to African diseases, with the yield potential of tropical japonica parents (Jones et al, 1997; Futakuchi et al, 2012). Cultivars derived from these crosses that performed well were named New Rice for Africa (NERICA).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Plant Characteristics of High‐Yielding Upland Rice Cultivars in West Africa

Saito

2016

Crop Science

Self Cite

View full text Add to dashboard Cite

In West Africa, upland rice (Oryza spp.) is typically grown in low‐input production systems under low soil fertility conditions. Genetic improvement may offer a cost‐effective approach to improving the productivity rather than approaches that rely solely on external nutrient inputs. In the 1990s, the upland rice breeding program of the West Africa Rice Development Association (now Africa Rice Center [AfricaRice]) developed New Rice for Africa (NERICA) cultivars. However, recent studies suggest that there is scope for improving on the currently available NERICA cultivars. The objectives of this study are to (i) quantify yield advantage of two cultivars (Aus 257 and IR 74371‐3‐1‐1) which were identified as high‐yielding ones from a wide range of materials, over NERICA 1, and (ii) identify plant characteristics of these two high‐yielding cultivars. Data were compiled from nine on‐station and 23 on‐farm trials in Benin. On average over all the trials, the two cultivars out yielded local check upland NERICA 1. Particularly, their relative yield advantage was higher when NERICA 1 showed low yield. Aus 257 had greater biomass accumulation, harvest index (HI), and uptake of N, P, and K. Greater biomass accumulation was the result of high leaf area index (LAI). Cultivar variation in nutrient‐use efficiency also contributed to high yield, and IR 74371‐3‐1‐1 showed higher nutrient‐use efficiency than NERICA 1 and Aus 257. These results suggest that the use of the two cultivars with greater biomass accumulation, harvest index, nutrient uptake, and use efficiency is critical for improving rice yield.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Plant Characteristics Of High-yielding Upland Rice Cultivarsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Plant Characteristics of High‐Yielding Upland Rice Cultivars in West Africa

Saito

2016

Crop Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recent breeding progress in upland rice in the tropics has replaced traditional upland rice varieties characterized by low yield, tall plants, and few tillers by improved varieties; in West Africa, the traditional varieties are often tropical japonica (Oryza sativa) or Oryza glaberrima, which is highly weed competitive, and resistant to local biotic and abiotic stresses (Arouna et al, 2017;Atlin et al, 2006;Futakuchi et al, 2012;Pinheiro et al, 2006;Saito & Futakuchi, 2009). However, few reports have provided an overview of progress in genetic improvement and yield gains observed for upland rice in the tropics (Gupta & O'Toole, 1986).…”

Section: Introductionmentioning

confidence: 99%

Progress in varietal improvement for increasing upland rice productivity in the tropics

Saito

Asai

Zhao

et al. 2018

Plant Production Science

Self Cite

View full text Add to dashboard Cite

Enhancing rice yield in upland rice systems through genetic improvement remains a major challenge in the tropics. This review aims to provide the trends on upland rice cultivation over the last 30 years and recent distribution of upland rice in the tropics, and to report progress in studies on genetic improvement for enhancing productivity in Africa, Asia, and Latin America. While upland rice cultivation area has reduced in Asia and Latin America over the last 30 years, the area in Africa has increased. The current share of upland rice area in total rice area is related to rainfall and gross national income per capita, especially in Africa, and higher share is associated with lower rice selfsufficiency at national level. Breeding programs in Asia and Latin America have developed highyielding varieties using indica materials as parents. In Africa, New Rice for Africa (NERICA) varieties were developed from crosses between improved tropical japonica and Oryza glaberrima. However, recent studies report that there is scope for improving existing NERICA using upland indica materials from Asia. In highlands of Africa, there are ongoing breeding programs using japonica varieties, such as the Nepalese Chhomrong Dhan. Key important plant traits used in the breeding programs are not largely different across regions, especially intermediate plant height and tillering capacity (which may be related to weed-suppressive ability), and high harvest index. In conclusion, we propose an international network for breeding upland rice with accelerating seed exchange across regions that could enhance upland rice productivity through genetic improvement.

show abstract

“…There is a possibility that the wild species may have traits adaptable to the growth under low N conditions and show N responses different from those of the cultivated Oryza species. Therefore, it is also necessary to evaluate the N response in the wild species as well as the cultivated species (Futakuchi et al, 2012).…”

mentioning

confidence: 99%