Selection Index for High Density Grain in Rice to Maximize Productivity

Govindarasu, R.; Manian, K.; Ramamoorthi, N.; Hanifa, Aqni

doi:10.1046/j.1439-037x.2000.00405.x

Cited by 3 publications

(2 citation statements)

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“…The economic consequences of the effects of discolouration on cereal grain yield and quality, especially in wheat, have been discussed by Gooding et al (2002). Earlier studies have shown a significant effect of genotype on high density grain number per panicle (Padmaja Rao 1994;Govindarasu et al 2000). Mohapatra et al (1993) and Chau & Bhargava (1993) observed that the time of flowering and the position of the spikelet in the rachis affected the quality and proportion of high-density grains.…”

Section: Introductionmentioning

confidence: 99%

Effects of genotype and environment on seed yield and quality of rice

Krishnan

Rao

2005

J. Agric. Sci.

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SU MMARYSeed yield and seed quality determine much of the value of rice (Oryza sativa L.) crops to the producers. The effects of genotype and environment on seed yield and quality were investigated using 12 rice genotypes grown during 3 years (2000)(2001)(2002)(2003) at four different sowing dates in India, where detailed environmental data were collected. Yield, seed weight, proportion of seed setting and quality in terms of potential seed longevity, proportion of discoloured seeds, seed leachate conductivity and percentage germination were evaluated. The results were subjected to analysis of variance and the influence of environmental factors was evaluated by correlation analysis. Analysis of variance suggested that proportion of seed setting, seed leachate conductivity, potential seed longevity, percentage seed germination and proportion of seed discoloration were influenced more by environmental effects than by genotypic effects. In contrast, yield, panicle number, seed weight, and proportion of highdensity grains were influenced more by genotypic than by environmental effects. The significant interaction effects of genotype and environment for all characteristics were attributed to differential resistance of genotypes to lodging (caused by increased plant height, low radiation and excessive rain at the time of grain filling) and were associated with fewer panicles harvested, lower seed setting and lower seed weight. Correlation analysis suggested that warm weather conditions with high solar radiation and without excessive rains during grain filling stage gave the best rice seed yield with high quality.

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Section: Introductionmentioning

confidence: 99%

Effects of genotype and environment on seed yield and quality of rice

Krishnan

Rao

2005

J. Agric. Sci.

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“…Genotype is the primary source of variation in kernel weight, number of panicles, grains per panicle and overall yield. 75,76 Delayed maturation, immature grains and contamination of grain with other types of different sizes and weights were some of the consequences of volunteer rice infestation. In the fields with volunteer rice, the panicles on volunteer rice plants were fewer compared with the planted cultivar.…”

Section: Yield Attributesmentioning

confidence: 99%