scholarly journals Phenotyping and Association Analysis of Grain Zinc and Iron Content with Seed Yield in Diverse Local Germplasm of Rice

Author(s):  
Swapan K. Tripathy

Background: Rice (Oryza sativa L.) feeds more than half of the world population, but it is a poor source of zinc (Zn) and iron (Fe). Therefore, there is a need for Zn and Fe- biofortified rice in the food chain. For this, rice breeding needs to be re-oriented to improve the status of grain Zn and Fe content while increasing the yield potential. Identification of micronutrient-rich donors and their association study with agro-economic traits can pave the way for nutritional and food security. Methods: Zinc and iron content of a set of 92 rice genotypes was estimated in the aliquot of seed extract by using an Inductive Coupled Plasma-Optical Emission Spectrophotometer (ICP-OES) to explore donors and to study the degree of association of these micronutrients with agro-economic traits including grain quality traits and seed yield. Result: The top Fe (≥50 ppm) and Zn dense (≥40 ppm) genotypes identified were P44 mutant selection-1, ORCZ 75-3-1, Basudha, Malliphulajhuli, Tikimahsuri and Nikipankhia. P44 mutant Sel.-1 and ORCZ 75-3-1 had good yield potential (44 q ha-1). Grains/panicles and the number of effective bearing tillers/hill maintained an appreciably strong positive association with seed yield, while plant height had an inverse relationship. Grain Fe content positively correlated with panicle length. On the other hand, Zn is positively associated with tillering ability and grains/panicle. Grain Fe and Zn revealed strong a inter se positive association. Interestingly, grain Fe revealed no association, but grain Zn revealed significant positive relationship with seed yield. This envisaged better scope for genetic enhancement of grain Zn content along with substantial increase in grain Fe without any yield penalty.

Author(s):  
Maini Bhattacharjee ◽  
Kasturi Majumder ◽  
Sabyasachi Kundagrami ◽  
Tapash Dasgupta

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.


Author(s):  
O.V. Palinchak ◽  
I.I. Kolesnik

Aim. To assess the melon collection material for seed productivity and to identify sources of a valuable trait for involvement in the breeding process in the northern Steppe of Ukraine. Results and Discussion. Our analysis revealed relationships between the main economic traits, and we established that the productivity of fruits and seeds significantly depended on environmental factors during the study years. There was a strong correlation between these traits (r = 0.71), while the seed productivity more depended on the fruit number per plant (r = 0.62) than on their average weight (r = 0.41). The accessions under investigation differed by fulfillment of their seed yield potential. Among the accessions included in group 4 with high seed productivity, high seed yields were provided by such accessions as Desertnaia 5 (RUS), Ineia (UKR), Delicious 51 (USA), Chaika (UKR), Fortuna (UKR), and Pamiati Pangalo (MDA) (22.3-25.3 g/plant; 0.23-0.26 t/ha). Four accessions from group 5 were identified as the most valuable genetic sources of very high seed productivity: Mistseva 256/98 (UKR), Berehynia (UKR), Victoria (MDA), and Iliyskaya (KAZ) (26.8-29.6 g/plant; 0.27-0.30 t/ha), which exceeded the check variety by 12.8-5.6 g/plant or by 0.13-0.16 t/ha. The seed yield, as a measure of the potential number of seeds depending on the fruit yield, and the 1000-seed weight, as an indicator of the seed size and plumpness, are also important traits in assessing the seed productivity of collection accessions. The highest percentages of seed yield were observed in accessions Pepen golden (ROU), Ananasna 217/06 (RUS), Accession 4596 (USA), Mistseva 256/98 (UKR), Inhulka (UKR), Mistsevyi 5827 (KAZ), and Basarabiya (MDA): 1.23-1.42% (0.33-0.52% higher than from the check variety). As to the 1000-seed weight, the highest values were recorded for accessions Pridnestrovskaya (MDA), Lyleia (UKR), Dumka (UKR), Ineia (UKR), Mistseva 256/98 (UKR), Pamyati Pangalo (MDA), and Berehynia (UKR): 40.4-46.2 g (+3.9-9.7 g to the check variety). Due to the combination of high yield capacity and increased seed productivity, variety Berehynia (UL3800002) originating from Ukraine has been submitted for registration to the National Centre for Plant Genetic Resources of Ukraine as an accession of the gene pool. Conclusions. Assessment of the genetic diversity of melons revealed patterns in levels of seed productivity, depending on the variety; and the relationships between the main economic traits were determined. Sources of valuable economic traits for further use in breeding have been identified: with high seed productivity (10), with increased seed yield (7) and with large seeds (7). Valuable specimen of melon, Berehynia (UL3800002), with high seed productivity has been singled out and submitted for registration to the National Center for Plant Genetic Resources of Ukraine.


Genes ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 745
Author(s):  
Youngho Kwon ◽  
Nkulu Rolly Kabange ◽  
Ji-Yun Lee ◽  
So-Myeong Lee ◽  
Jin-Kyung Cha ◽  
...  

Shoot branching is considered as an important trait for the architecture of plants and contributes to their growth and productivity. In cereal crops, such as rice, shoot branching is controlled by many factors, including phytohormones signaling networks, operating either in synergy or antagonizing each other. In rice, shoot branching indicates the ability to produce more tillers that are essential for achieving high productivity and yield potential. In the present study, we evaluated the growth and development, and yield components of a doubled haploid population derived from a cross between 93-11 (P1, indica) and Milyang352 (P2, japonica), grown under normal nitrogen and low nitrogen cultivation open field conditions. The results of the phenotypic evaluation indicated that parental lines 93-11 (P1, a high tillering indica cultivar) and Milyang352 (P2, a low tillering japonica cultivar) showed distinctive phenotypic responses, also reflected in their derived population. In addition, the linkage mapping and quantitative trait locus (QTL) analysis detected three QTLs associated with tiller number on chromosome 2 (qTNN2-1, 130 cM, logarithm of the odds (LOD) 4.14, PVE 14.5%; and qTNL2-1, 134 cM, LOD: 6.05, PVE: 20.5%) and chromosome 4 (qTN4-1, 134 cM, LOD 3.92, PVE 14.5%), with qTNL2-1 having the highest phenotypic variation explained, and the only QTL associated with tiller number under low nitrogen cultivation conditions, using Kompetitive Allele-Specific PCR (KASP) and Fluidigm markers. The additive effect (1.81) of qTNL2-1 indicates that the allele from 93-11 (P1) contributed to the observed phenotypic variation for tiller number under low nitrogen cultivation. The breakthrough is that the majority of the candidate genes harbored by the QTLs qTNL2-1 and qTNN4-1 (here associated with the control of shoot branching under low and normal nitrogen cultivation, respectively), were also proposed to be involved in plant stress signaling or response mechanisms, with regard to their annotations and previous reports. Therefore, put together, these results would suggest that a possible crosstalk exists between the control of plant growth and development and the stress response in rice.


2016 ◽  
Vol 96 (1) ◽  
pp. 151-159 ◽  
Author(s):  
Gan Yantai ◽  
K. Neil Harker ◽  
H. Randy Kutcher ◽  
Robert H. Gulden ◽  
Byron Irvine ◽  
...  

Optimal plant density is required to improve plant phenological traits and maximize seed yield in field crops. In this study, we determined the effect of plant density on duration of flowering, post-flowering phase, and seed yield of canola in diverse environments. The field study was conducted at 16 site-years across the major canola growing area of western Canada from 2010 to 2012. The cultivar InVigor® 5440, a glufosinate-resistant hybrid, was grown at five plant densities (20, 40, 60, 80, and 100 plants m−2) in a randomized complete block design with four replicates. Canola seed yield had a linear relationship with plant density at 8 of the 16 site-years, a quadratic relationship at 4 site-years, and there was no correlation between the two variables in the remaining 4 site-years. At site-years with low to medium productivity, canola seed yield increased by 10.2 to 14.7 kg ha−1 for every additional plant per square metre. Averaged across the 16 diverse environments, canola plants spent an average of 22% of their life cycle flowering and another 27% of the time filling seed post-flowering. Canola seed yield had a negative association with duration of flowering and a positive association with the days post-flowering but was not associated with number of days to maturity. The post-flowering period was 12.7, 14.7, and 12.6 d (or 55, 68, and 58%) longer in high-yield experiments than in low-yield experiments in 2010, 2011, and 2012, respectively. We conclude that optimization of plant density for canola seed yield varies with environment and that a longer post-flowering period is critical for increasing canola yield in western Canada.


2011 ◽  
Vol 62 (1) ◽  
pp. 1 ◽  
Author(s):  
R. J. Lawn ◽  
A. T. James

The purpose of this paper and its companion1 is to describe how, in eastern Australia, soybean improvement, in terms of both breeding and agronomy, has been informed and influenced over the past four decades by physiological understanding of the environmental control of phenology. This first paper describes how initial attempts to grow soybean in eastern Australia, using varieties and production practices from the southern USA, met with limited success due to large variety × environment interaction effects on seed yield. In particular, there were large variety × location, variety × sowing date, and variety × sowing date × density effects. These various interaction effects were ultimately explained in terms of the effects of photo-thermal environment on the phenology of different varieties, and the consequences for radiation interception, dry matter production, harvest index, and seed yield. This knowledge enabled the formulation of agronomic practices to optimise sowing date and planting arrangement to suit particular varieties, and underpinned the establishment of commercial production in south-eastern Queensland in the early 1970s. It also influenced the establishment and operation over the next three decades of several separate breeding programs, each targeting phenological adaptation to specific latitudinal regions of eastern Australia. This paper also describes how physiological developments internationally, particularly the discovery of the long juvenile trait and to a lesser extent the semi-dwarf ideotype, subsequently enabled an approach to be conceived for broadening the phenological adaptation of soybeans across latitudes and sowing dates. The application of this approach, and its outcomes in terms of varietal improvement, agronomic management, and the structure of the breeding program, are described in the companion paper.


2017 ◽  
Vol 9 (4) ◽  
pp. 109-117 ◽  
Author(s):  
Budianti Kadidaa ◽  
Gusti Ray Sadimantar ◽  
Suaib . ◽  
La Ode Safuan ◽  
Muhidin .

2016 ◽  
Vol 96 (1) ◽  
pp. 17-26 ◽  
Author(s):  
Yunfei* Jiang ◽  
Claude D. Caldwell

Camelina [Camelina sativa (L.) Crantz] has potential in aquaculture, livestock feed production, and the biofuel industry. It is necessary to determine the appropriate production technology for the newly introduced crop under different environmental conditions. The objective of this 2-year study was to measure the response of five camelina genotypes in terms of seed yield, yield components, and disease incidence to applied nitrogen (N) at multiple sites in the Maritime provinces of eastern Canada. The factorial experiment was set up as a randomized complete block design. The two factors were six N rates (0, 25, 50, 100, 150, and 200 kg ha−1 N) and five genotypes of camelina (Calena, CDI002, CDI005, CDI007, and CDI008). The interactive effect of N rates and genotypes was considered. Results showed that camelina, which is usually considered a low-input crop, responded positively to increased applied N at rates up to 200 kg ha−1 N. Seed yield responded differently to applied N rates depending on genotype. Branch and pod development were decisive for seed yield. The advanced line CDI007 had the highest yield potential among the five genotypes. Downy mildew infection was positively correlated with applied N rates; however, seed yield was not significantly affected by downy mildew infection.


Genetika ◽  
2008 ◽  
Vol 40 (2) ◽  
pp. 109-120
Author(s):  
H.K. Yadav ◽  
S. Shukla ◽  
S.P. Singh

Opium poppy (Papaver somniferum L.) is an important medicinal plant of pharmacopoel uses. Opium latex and its derivatives are used in different medicines as analgesic, narcotic, sedative, sudorific, hyponitic, antispasmodic, ant diarrhea and cough etc. Genetic improvement in opium and seed yield, component breeding is important and selection based on multiple characters is more beneficial in developing desired plant types. Therefore the present study was made on group of 22 strains of opium poppy to find out variability and suitable selection indices for opium and seed yield. Heritability in broad sense was high for capsule weight/plant, plant height, capsule length, stem diameter and opium yield. The discriminant functions based on single character were less efficient while on the basis of combination it was in general more efficient. The comparison of different functions revealed that capsule weight/plant, capsule length, plant height are major yield component and thus practicing selection for attainment of high opium and seed yield lines, maximum weight age could be given to these characters. The positive association of opium yield and seed yield suggested that by adopting suitable component breeding and selection, a dual-purpose variety (opium and seed yield) may be developed.


2020 ◽  
Vol 26 (2) ◽  
Author(s):  
Ajey Karan Chaudhari ◽  
Anand Prakash Singh ◽  
B R Chaudhary

Mutation breeding like in other plants can significantly strengthen medicinal plants breeding programs and help to produce novel varieties with higher yield potential and improved yield quality. The dry and healthy seeds of P. corylifolia IC 111228 were subjected to mutagenic treatments namely ethyl methane sulphonate (EMS) and sodium azide (SA). The treatment concentrations 15mM, 30mM, 45mM and 60mM of EMS and 1mM, 2mM, 3mM and 4mM of SA were chosen to evaluate the mutagenic potential in either case. The morphological traits were evaluated in M1 generation viz. plant height, days to flowering initiation, seed yield/plant and 100-seed weight. In EMS treatment 15 mM increased the plant height and seed yield, while in SA treatment 4 mM increased the seed yield/plant and 100-seed yield.


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