Distinguishing upland and lowland rice ecotypes by selective SSRs and their applications in molecular-assisted selection of rice drought resistance

Abstract. Akbar MR, Purwoko BS, Dewi IS, Suwarno WB, Sugiyanta, Anshori MF. 2021. Agronomic and yield selection of doubled haploid lines of rainfed lowland rice in advanced yield trials. Biodiversitas 22: 3006-3012. Selection process is important step to obtain high yielding variety. This study aimed to obtain information on agronomic performance of doubled haploid lines of rainfed rice in advanced yield trials and select the best lines for multi-location yield trials. Two experiments were conducted in Bogor and Subang using a randomized complete block design for each location and consisted of 35 doubled haploid lines and two check varieties namely Ciherang and Inpari 18 as a treatment. The result revealed that interaction between genotype and environment (G x E) significantly affected all agronomic characters, except on the panicle length. Characters with high heritability value were all agronomic characters except number of productive tillers and productivity. Genotypic correlation analysis showed that number of productive tillers and weight of 1000 grains had significant and positive correlation with productivity. The selection used weighted selection index based on multivariate analysis. Fourteen lines were selected for multi-location yield trials. These lines had characteristics as follows: number of productive tillers (14.0-17.7 tillers), weight of 1000 grains (24.7-32.5 g), and productivity (5.0-6.2 ton ha-1). The selected lines can be evaluated further to obtain superior lines in multi-location trials.

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Short Communication: Selection of doubled haploid lines of rainfed lowland rice in preliminary yield trial

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d201003 ◽

2019 ◽

Vol 20 (10) ◽

Author(s):

Miftahur Rizqi Akbar ◽

Bambang Sapta Purwoko ◽

Iswari Saraswati Dewi ◽

Willy Bayuardi Suwarno ◽

Sugiyanta

Keyword(s):

Doubled Haploid ◽

Short Communication ◽

Lowland Rice ◽

Yield Potential ◽

High Yield ◽

Agronomic Characters ◽

Doubled Haploid Lines ◽

Yield Trial ◽

Rainfed Lowland ◽

Selection Of

Abstract. Akbar MR, Purwoko BS, Dewi IS, Suwarno WB, Sugiyanta. 2019. Short Communication: Selection of doubled haploid lines of rainfed lowland rice in preliminary yield trial. Biodiversitas 20: 2796-2801. Yield trial is an important step in rice breeding program. This research was aimed at evaluating agronomic characters and selecting the best doubled haploid rainfed rice lines for next advanced yield trial. An experiment was conducted in Indramayu from March to August 2017. The research was arranged in randomized complete block design (RCBD) with three replications. Materials used were fifty-eight doubled haploid lines and two check varieties namely Ciherang and Inpari 18. The results revealed that all observed characters had broad genetic variability and high heritability. The number of productive tillers and the number of filled grains per panicle had a positive correlation and direct effect on productivity. Based on index selection, thirty lines were selected to have good agronomic characters and high yield. These lines had characteristics of plant height (85.7-124.7 cm), number of productive tillers (8.6-14.8 tillers), day to harvest (104.0-117.3 days), number of filled grains per panicle (136.7-264.7 grains), number of total grains per panicle (152.0-305.7 grains), weight of 1000 grain (21.5-31.3 g), and productivity (4.1-6.8 tons ha-1). Keywords: good agronomic trait, high yield potential, selection index

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Isolation and selection of indigenous Azospirillum spp. from a subtropical island, and effect of inoculation on growth of lowland rice under several levels of N application

Biology and Fertility of Soils ◽

10.1007/s003740050473 ◽

1998 ◽

Vol 28 (2) ◽

pp. 129-135 ◽

Cited By ~ 15

Author(s):

L. Gunarto ◽

K. Adachi ◽

T. Senboku

Keyword(s):

Lowland Rice ◽

N Application ◽

Selection Of

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Differentiation of accessions from the national lentil collection according to the level of drought resistance on a various concentrations PEG-6000 solution

Faktori eksperimental'noi evolucii organizmiv ◽

10.7124/feeo.v29.1409 ◽

2021 ◽

Vol 29 ◽

pp. 68-73

Author(s):

N. Vus ◽

A. O. Vasylenko ◽

L. M. Shevchenko

Keyword(s):

Drought Resistance ◽

Rank Correlation ◽

Shoot Length ◽

Peg 6000 ◽

Spearman’S Rank Correlation ◽

Spearman’S Rank Correlation Coefficient ◽

Solution Methods ◽

Working Solution ◽

Range Of Variation ◽

Selection Of

Aim. assessment of accessions from the lentil national collectionon the level of drought resistance on a PEG-6000 solution. Methods. The germination was carried out in growth plates on a filter paper bed at t = 21ºC for five days. A working solution of PEG-6000 with concentrations of 15.0% and 19.5% was used. The control was germinated in distilled water. The length of the shoot and root was measured and the level of depression of growth processes was calculated. Results. When germinating on a PEG-6000 solution with 19.5% concentration, the overwhelming number of accessions had depression indicators for shoots above 85% and above 60% for roots, and therefore it was not possible to isolate samples tolerant to the action of PEG-6000. When germinating on a 15% solution of PEG-6000, a wider range of variation was noted: depression in feature of “root length” ranged from 0% to 100%, “shoot length” - from 50% to 100%. The calculated Spearman's rank correlation coefficient confirms that shoots, in comparison with roots, are more sensitive to the action of osmotic in both variants of the experiment. Conclusions. The concentration of PEG-6000 was established for the selection of sources and the ranking of samples by drought resistance. Sources of drought resistance were identified from the studied sample – accessions subsp. microsperma: 8-MIL M 5 (UD0600007, France), UD0600028 (Ethiopia), Giza 9 (UD0600065, Egypt) and the accession-standard of drought resistance is Gornostepnaya (UD0600131, Armenia) subsp. microsperma. Keywords: lentil, PEG-6000, concentration, sources of drought resistance.

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Drought resistance characters and variety development for rainfed lowland rice in Southeast Asia

Drought Frontiers in Rice ◽

10.1142/9789814280013_0005 ◽

2009 ◽

pp. 75-89 ◽

Cited By ~ 1

Author(s):

Shu Fukai ◽

Jaya Basnayake ◽

Ouk Makara

Keyword(s):

Southeast Asia ◽

Drought Resistance ◽

Lowland Rice ◽

Rainfed Lowland

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Participatory evaluation and selection of improved haricot bean varieties at liben district, lowland agro ecology of Guji zone, Oromia regional state, Ethiopia

Asian Journal of Agriculture and Rural Development ◽

10.18488/journal.1005/2017.7.8/1005.8.160.166 ◽

2018 ◽

Vol 7 (8) ◽

pp. 160-166

Author(s):

Basha Kebede ◽

Dembi Korji ◽

Girma Amare

Keyword(s):

Drought Resistance ◽

Participatory Evaluation ◽

Descriptive Statistics ◽

Market Demand ◽

Yield Performance ◽

Local Variety ◽

Resistance To Insects ◽

Check Variety ◽

Exchange Visit ◽

Selection Of

The activity was conducted in Liben district to evaluate the yield performance of improved haricot bean varieties. 25 pastorals and agro pastorals were selected from Measa kebele with collaboration of Liben Pastoral and Agro Pastoral Office, Zonal Mobile Supporting Team and kebele leaders. The 25 pastoral and agro pastorals were grouped into one PAPRG. Then 25 PAPRG members were regrouped into three experimental pastorals and agro pastoralists. Training were given for PAPRG members. Exchange visit was arranged to share experience on the work each PAPRG. Haramaya, Awasa Dume, Ebado varieties were evaluated with standard check variety. Descriptive statistics and direct matrix ranking was used to analysis the data. Local variety give the highest yield (31kg/ha). PAPRG criteria for haricot bean production was market demand, color, disease/insect reaction, drought resistance. Accordingly, Ebado variety was preferred by PAPRGs based on marketability while Local check and Awasa Dube were selected as first and second respectively based on drought resistance, number of pod/plant, higher yield and resistance to insects. Haramaya variety was susceptible to insects. Pastoralists and agro pastoralists should use Ebado variety to increase their income and local variety for household consumption.

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Changes in Root Anatomy of Peanut (Arachis hypogaea L.) under Different Durations of Early Season Drought

Agronomy ◽

10.3390/agronomy9050215 ◽

2019 ◽

Vol 9 (5) ◽

pp. 215 ◽

Cited By ~ 2

Author(s):

Nuengsap Thangthong ◽

Sanun Jogloy ◽

Tasanai Punjansing ◽

Craig K. Kvien ◽

Thawan Kesmala ◽

...

Keyword(s):

Drought Resistance ◽

Lateral Roots ◽

Soil Surface ◽

Vessel Diameter ◽

Second Order ◽

Root Anatomy ◽

Drought Treatment ◽

Drought Period ◽

Early Season ◽

Selection Of

Changes in the anatomical structure of peanut roots due to early season drought will likely affect the water acquiring capacity of the root system. Yet, as important as these changes are likely to be in conferring drought resistance, they have not been thoroughly investigated. The objective of this study was to investigate the effects of different durations of drought on the root anatomy of peanut in response to early season drought. Plants of peanut genotype ICGV 98305 were grown in rhizoboxes with an internal dimension of 50 cm in width, 10 cm in thickness and 120 cm in height. Fourteen days after emergence, water was withheld for periods of 0, 7, 14 or 21 days. After these drought periods, the first and second order roots from 0–20 cm below soil surface were sampled for anatomical observation. The mean xylem vessel diameter of first- order lateral roots was higher than that of second- order lateral roots. Under early season drought stress root anatomy changes were more pronounced in the longer drought period treatments. Twenty-one days after imposing water stress, the drought treatment and irrigated treatment were clearly different in diameter, number and area of xylem vessels of first- and second-order lateral roots. Plants under drought conditions had a smaller diameter and area of xylem vessels than did the plants under irrigated control. The ability of plants to change root anatomy likely improves water uptake and transport and this may be an important mechanism for drought tolerance. The information will be useful for the selection of drought durations for evaluation of root anatomy related to drought resistance and the selection of key traits for drought resistance.

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