Backcross Breeding for Enhancing Minerals (Iron and Zinc) Content in Rice (Oryza sativa L.)

Rice is one of the most important staple food crops for billions of people throughout the world. It is the cheapest source of dietary energy, protein and minerals for people but poor in micronutrients such as Fe and Zn to eliminate “hidden hunger”. In the present study, a population of 126recombinant inbred lines developed from a cross between Lemont X Satabdi (IET 4786) were used to identify high iron and zinc content coupled with yield and yield attributing traits. Analysis of Variance revealed that a considerable variation in iron and zinc existed among genotypes. The correlation study revealed that number of filled grain was positively associated with panicle length and yield per plant and number of panicles, but no significant positive correlation was observed between grain zinc content and iron content. Zinc and iron content of rice was estimated using Atomic Absorption Spectrophotometer and the samples were prepared by tri-acid digestion method. Among RIL lines, the line 57, 97,120, 48, 99, 124 contained more than 30 ppm Fe and the lines 24, 6, 9, 23, 29, 125 were found to possess more than 50 ppm Zn. The lines 9,6,48 and 57 were recorded to be high yielding with high zinc and Fe content in grain and in future these four lines look promising for multi location trial also. These high Fe and Zn content genotypes can be utilized in future breeding programme as a donor or good source for bio fortification of rice genotypes.

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Breeding for Improving Human Nutrition and Grain Quality through Biofortification of Traditional Land Races and Improved Cultivars in Rice (Oryza sativa L.)

Examining the Development, Regulation, and Consumption of Functional Foods - Advances in Environmental Engineering and Green Technologies ◽

10.4018/978-1-5225-0607-2.ch006 ◽

2017 ◽

pp. 126-148

Author(s):

P. Savitha ◽

R. Usha Kumari

Keyword(s):

Oryza Sativa ◽

Tamil Nadu ◽

Oryza Sativa L ◽

Farming Systems ◽

Total Production ◽

Micronutrient Deficiencies ◽

Rice Varieties ◽

The Family ◽

Iron And Zinc

Rice (Oryza sativa L.) which belongs to the family poaceae, is the life and the prince among cereals as this unique grain helps to sustain two thirds of the world's population. India have traditionally been used or rice cultivation due to availability of water and conductive soil (Nadesa panic). Rice was grown in 155.30 million hectares and around 600 million tonnes of rice harvested each year globally. About 114 countries produce rice with China and India supporting 50 per cent of total production. India stands first in area under cultivation (41.85 mha) and ranks second in production, where as China ranks first in production with just half of the area. India's production is 89.13 million tonnes with a productivity of 2130 kg/ha. Among the rice producing states of India, Tamil Nadu ranks sixth in production (6.53 million tonnes) and second in productivity of 3918 kg/ha with an area of 20.16 lakh ha (Season and Crop Report, 2012). Local farmers in such farming systems retain the traditional varieties based on their knowledge of the quality of the rice varieties and their adaptation to varying agro-ecological situations created by diverse seasons and land situations (Tapasi das & Ashesh Kumar Das, 2014). Among the major micronutrient deficiencies common in rice consuming countries, iron and zinc deficiencies (“hidden hunger”), affect over three billion people worldwide, mostly in developing countries (Welch & Graham, 2004).

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Identification of Polymorphic Loci between Donors and Recipient Parents for Marker Assisted Backcross Breeding in Rice (Oryza sativa L.)

International Journal of Pure & Applied Bioscience ◽

10.18782/2320-7051.5437 ◽

2017 ◽

Vol 5 (4) ◽

pp. 723-727

Author(s):

P. J. Harikrishnan ◽

Keyword(s):

Oryza Sativa ◽

Oryza Sativa L ◽

Polymorphic Loci ◽

Backcross Breeding ◽

Marker Assisted Backcross Breeding

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Study The Inheritance of Iron and Zinc in Segregating Population of Rice (Oryza sativa L.)

International Journal of Pure & Applied Bioscience ◽

10.18782/2320-7051.2891 ◽

2017 ◽

Vol 5 (5) ◽

pp. 888-892 ◽

Cited By ~ 1

Author(s):

Maddeppa Mallimar ◽

Keyword(s):

Oryza Sativa ◽

Oryza Sativa L ◽

Iron And Zinc ◽

Segregating Population

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Descriptive Statistics and Heritability for Agronomic Traits and Grain Micronutrient Content in Rice (Oryza sativa L.)

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2019/v38i630419 ◽

2019 ◽

pp. 1-10

Author(s):

Avinash Kumar ◽

Ashutosh Kumar ◽

N. K. Singh ◽

Rajesh Kumar ◽

S. K. Singh ◽

...

Keyword(s):

Grain Yield ◽

Agronomic Traits ◽

Oryza Sativa L ◽

Block Design ◽

Zinc Content ◽

Yield Potential ◽

High Yield ◽

Grain Zinc ◽

Iron And Zinc ◽

Breeding Programmes

In the present investigation, 10 parents and their 45 crosses (half diallel) along with 2 standard checks (Rajendra Nilam and Rajendra Mahsuri-1) were evaluated during Kharif, 2018 in Randomized Complete Block Design (RCBD) with 3 replications at Rice Farm Section, Dr. Rajendra Prasad Central Agricultural University (RPCAU), Pusa, Bihar. The objective of this study was to identify promising rice genotypes having desirable combination of morphological traits along with high grain iron and zinc content and high grain yield potential. The results of variability parameters indicated that ample amount of genetic variability was present for all the studied traits. Most of the traits showed high heritability coupled with high genetic advance indicating fruitfulness of selection for improvement of these traits. One genotype (P2×P7) with high grain iron (16.10 ppm) and grain zinc (26.40 ppm) content along with high yield (43.12 g/plant) was identified. Genotypes with high grain iron coupled with high grain yield (P7×P9, P8×P9, P5×P7 and P5×P9) and high grain zinc content coupled with high grain yield (P4×P7, P9×P10, P8×P9 and P5×P7) were also identified. These promising genotypes identified can be used further in breeding programmes to obtain superior segregants with high grain micronutrient content and high grain yield.

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