Heterosis for rate of nitrogen uptake in F<sub>1</sub>rice hybrids

Suzuki, Yasuhiro; Yoshida, Hisashi; Morooka, Minora

doi:10.1080/00380768.1988.10415582

Cited by 3 publications

(1 citation statement)

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“…Shi et al (1999) reported that a hybrid had higher root dry weight and greater nitrogen uptake than its parents, especially under low -nitrogen treatment. Suzuki et al (1988) observed that there was a considerable heterosis for the nitrogen During grain fi lling in rice, nitrogen is remobilized from leaves to grains along with photo -assimilates to meet the demand of grain development. At the same time, enough nitrogen must remain in the leaves to maintain the rate of leaf photosynthesis.…”

Section: Varietal Difference In Nuementioning

confidence: 99%

Crop Improvement for Nitrogen Use Efficiency in Irrigated Lowland Rice

Peng

2011

The Molecular and Physiological Basis of Nutrient Use Efficiency in Crops

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There is an urgent need to develop superior nitrogen -effi cient rice varieties because of poor fertilizer nitrogen use effi ciency (NUE), associated economic and environmental concerns, and the lack of adoption of improved nitrogen management practices. Genotypic variation in NUE has been reported for rice in many studies. The physiological mechanisms underlying both nitrogen uptake effi ciency and utilization effi ciency are fairly well understood. Plant traits that are closely associated with NUE have been identifi ed. In general, there is a positive relationship between grain yield and NUE, suggesting that it is possible to develop rice varieties with both high grain yield and high NUE. An empirical breeding method can be used for developing nitrogeneffi cient varieties using existing genotypic variation in NUE. However, for signifi cant improvement in NUE, new breeding techniques such as the development of F 1 hybrids, marker -aided selection, transformation, and genetic engineering should be considered.

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Section: Varietal Difference In Nuementioning

confidence: 99%