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Fine-mapping and validating qHTSF4.1 to increase spikelet fertility under heat stress at flowering in rice [PDF]

Theoretical and Applied Genetics, 2015
This study fine mapped and validated a QTL on rice chromosome 4 that increases spikelet fertility under high temperature (over 37 °C) at the flowering stage. Climate change has a negative effect on crop production and food security. Understanding the genetic mechanism of heat tolerance and developing heat-tolerant varieties is essential to cope with ...
Krishna Jagadish, Changrong Ye, Glenn B Gregorio   +2 more
exaly   +4 more sources

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Genetic dissection of embryo sac fertility, pollen fertility, and their contributions to spikelet fertility of intersubspecific hybrids in rice

Theoretical and Applied Genetics, 2004
The partial sterility of hybrids has been a major barrier for utilization of the strong heterosis expressed in hybrids between Oryza sativa ssp. indica and O. sativa ssp. japonica. Wide-compatibility varieties, comprising a special class of germplasm, are able to produce fertile hybrids when crossed to both indica and japonica varieties.
Qifa Zhang, C G Xu, Zhang Qifa
exaly   +3 more sources

Effect of nitrogen fertilization on rice spikelet differentiation and survival

The Journal of Agricultural Science, 1996
SUMMARYExperiments were conducted in glasshouses at the Agronomy Department, International Rice Research Institute (IRRI), Philippines, in 1987 and 1988 to test the effects of small amounts of additional N applied at different times during the vegetative and reproductive phases of growth on rice yield components and on spikelet differentiation and ...
N. Senanayake, R. E. L. Naylor, S. K. De Datta   +2 more
openaire   +1 more source

Spikelet initiation of winter triticale and winter wheat in response to nitrogen fertilization

European Journal of Agronomy, 1999
Abstract Spikelet initiation in response to two levels of nitrogen fertilization (0 and 200 kg N ha −1 split into 5×40 kg N ha −1 ) was investigated on the main stem and the first initiated tiller of winter triticale ( Triticosecale WITTM., cv. Grado) and winter wheat ( Triticum aestivum L., cv.
Ewert, F., Honermeier, B.
openaire   +1 more source

Nitrogen fertilizer increases spikelet number per panicle by enhancing cytokinin synthesis in rice

Plant Cell Reports, 2013
Flower number per panicle is one of the most important traits in rice productivity determination. The number of flowers is established in the early stages of panicle development. Nitrogen fertilizer application before panicle initiation is well known to increase flower number. Nitrogen increases cytokinin (CKs) biosynthesis in plants, and CKs have very
Chengqiang, Ding, Juan, You, Lin, Chen, Shaohua, Wang, Yanfeng, Ding   +4 more
openaire   +2 more sources

Selection for Spikelet Fertility in a Semidwarf Durum Wheat Population¹

Crop Science, 1986
Genetic variability for spikelet fertility is present in durum wheat (Triticum turgidum L. var. durum). Divergent selection for spikelet fertility was practiced in a semidwarf durum population derived from a single cross of parents that differ for number of kernels/spikelet to determine the effect of indirect selection for this yield component on grain
R. G. Cantrell, E. S. Haro‐Arias
openaire   +1 more source

A Reduction in Spikelet Number and Fertility Causes Yield Vulnerability in High‐Yielding Rice

Agronomy Journal, 2017
Core Ideas Low irradiance caused by a later end to the rainy season as a result of climate change is of concern in Japan. The objectives of this study were to identify the critical factors causing yield instability in high‐yielding indica‐ and japonica‐dominant rice cultivars released from 1990 to 2010 in Japan over 3 yr with contrasting levels of ...
Tohru Kobata, Hibiki Ishi, Hiroyuki Iwasaki   +2 more
openaire   +1 more source

A novel digenic epistatic interaction at two loci regulating spikelet fertility in rice

Plant Growth Regulation, 2019
The seed setting rate (spikelet fertility) is an important determinant of rice yield. In the past few decades, genes that control rice seed set have been cloned, and many quantitative trait loci (QTL) have been identified. However, the epistasis influencing rice seed set remains largely unclear.
Yuxiang Zeng, Yuan Chen, Zhijuan Ji, Yan Liang, Changdeng Yang   +4 more
openaire   +1 more source

INFLUENCE OF BORON ON SPIKELET FERTILITY UNDER VARIED SOIL CONDITIONS IN RICE GENOTYPES

Journal of Plant Nutrition, 2013
Rice, grown on a wide range of soils with varying soil pH levels boron (B) availability, uptake and mobilization could be limiting hence may lead to lower productivity and rice yields has been tested at 11 locations on low yielding rice genotypes from, Initial Evaluation Trials (IET) of AICRIP viz.IET 20979, IET 21003, IET 21007, IET 21014, IET 21025 ...
P. Raghuveer Rao, D. Subrhamanyam, B. Sailaja, R. P. Singh, V. Ravichandran, G. V. Sudershan Rao, P. Swain, S. G. Sharma, S. Saha, S. Nadaradjan, P. J. R. Reddy, A. Shukla, P. C. Dey, D. P. Patel, S. Ravichandran, S. R. Voleti   +15 more
openaire   +1 more source

Vascular system of the fertile spikelet of Sorghum (Gramineae: Panicoideae)

Canadian Journal of Botany, 1991
The vascular system of the sessile, fertile spikelet of Sorghum was reconstructed from serial transverse sections. The vascular system is a composite of the basipetal extensions of the traces from the appendages on the rachilla. The rachilla immediately above the glumes consists of an outer and an inner series of these vascular extensions.
openaire   +1 more source