Early storage root bulking index and agronomic traits associated with early bulking in cassava

2016 ◽  
Vol 198 ◽  
pp. 171-178 ◽  
Author(s):  
Michael M. Chipeta ◽  
Paul Shanahan ◽  
Rob Melis ◽  
Julia Sibiya ◽  
Ibrahim R.M. Benesi
Keyword(s):  
Agronomic Traits ◽  
Storage Root ◽  
Early Bulking

scholarly journals Resequencing of 388 cassava accessions identifies valuable loci and selection for variation in heterozygosity

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Wei Hu ◽  
Changmian Ji ◽  
Zhe Liang ◽  
Jianqiu Ye ◽  
Wenjun Ou ◽  
...  
Keyword(s):  
Genome Wide Association Study ◽  
Agronomic Traits ◽  
Allelic Variation ◽  
Starch Content ◽  
Genomic Variation ◽  
Root Weight ◽  
Storage Root ◽  
Cassava Bacterial Blight ◽  
A Genome ◽  
Selection For

Abstract Background Heterozygous genomes are widespread in outcrossing and clonally propagated crops. However, the variation in heterozygosity underlying key agronomic traits and crop domestication remains largely unknown. Cassava is a staple crop in Africa and other tropical regions and has a highly heterozygous genome. Results We describe a genomic variation map from 388 resequenced genomes of cassava cultivars and wild accessions. We identify 52 loci for 23 agronomic traits through a genome-wide association study. Eighteen allelic variations in heterozygosity for nine candidate genes are significantly associated with seven key agronomic traits. We detect 81 selective sweeps with decreasing heterozygosity and nucleotide diversity, harboring 548 genes, which are enriched in multiple biological processes including growth, development, hormone metabolisms and responses, and immune-related processes. Artificial selection for decreased heterozygosity has contributed to the domestication of the large starchy storage root of cassava. Selection for homozygous GG allele in MeTIR1 during domestication contributes to increased starch content. Selection of homozygous AA allele in MeAHL17 is associated with increased storage root weight and cassava bacterial blight (CBB) susceptibility. We have verified the positive roles of MeTIR1 in increasing starch content and MeAHL17 in resistance to CBB by transient overexpression and silencing analysis. The allelic combinations in MeTIR1 and MeAHL17 may result in high starch content and resistance to CBB. Conclusions This study provides insights into allelic variation in heterozygosity associated with key agronomic traits and cassava domestication. It also offers valuable resources for the improvement of cassava and other highly heterozygous crops.

Relation of grain protein content and some agronomic traits in European cultivars of winter wheat

2012 ◽  
Vol 40 (4) ◽  
pp. 532-541 ◽  
Author(s):  
V. Mladenov ◽  
B. Banjac ◽  
A. Krishna ◽  
M. Milošević
Keyword(s):  
Winter Wheat ◽  
Protein Content ◽  
Agronomic Traits ◽  
Grain Protein Content ◽  
Grain Protein

Relationships between HMW-GS GluA1, GluB1 alleles and agronomic traits

Biologija ◽  
2008 ◽  
Vol 54 (1) ◽  
pp. 12-16
Author(s):  
Žilvinas Liatukas ◽  
Vytautas Ruzgas ◽  
Vanda Paplauskienė
Keyword(s):  
Agronomic Traits

Agronomic performance of autumn- and winter-cropped Indian mustard (Brassica juncea L.) in response to varying levels of nitrogen fertiliser

2020 ◽  
pp. 83-95
Author(s):  
Bent Al-Hoda Asghari ◽  
Mohsen Yousefi ◽  
Katarzyna Możdżeń ◽  
Joanna Puła ◽  
Peiman Zandi ◽  
...  
Keyword(s):  
Brassica Juncea ◽  
Seed Yield ◽  
Agronomic Traits ◽  
Growth Parameters ◽  
Indian Mustard ◽  
Climatic Conditions ◽  
Plant Seed ◽  
Nitrogen Fertiliser ◽  
Nitrogen Levels ◽  
Cropping Seasons

Indian mustard (Brassica juncea L. Czern) cultivation is suggested for regions with short seasons and low rainfall. Although there have been many studies conducted on agronomic production of mustard in Iran, the information regarding the interactive impact of cropping seasons and nitrogen fertiliser on growth characteristics and yield quality of mustard plant is still insufficient and requires further investigation. This study focused on the possible implications of different cropping seasons and different nitrogen levels on selected agronomic traits in mustard. In this experiment, five different doses of nitrogen and two sowing periods were used to assess for their combined effects on the growth parameters, seed yield and agronomic characteristics of mustard in the semi-arid climatic conditions of Takestan. The results revealed that cultivation seasons and nitrogen rates had a significant effect on plant height, biomass yield, number of siliques per plant, seed oil content and seed yield.

Yield performance with heritability measurements of half sib families obtained from maize variety Azam

1970 ◽  
pp. 33-36
Author(s):  
Faizan Mahmood, Hidayat- Ur-Rahman, Nazir Ahmad ◽  
Fahim-ul- Haq ◽  
Samrin Gul, Quaid Hussain ◽  
Ammara Khalid ◽  
Touheed Iqbal ◽  
...  
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Heritability Estimate ◽  
Kernel Weight ◽  
Yield Performance ◽  
Grain Moisture ◽  
Maize Variety ◽  
Ear Height ◽  
Sib Families

This study evaluated the performance of 64 half sib families (HSF) derived from “Azam” variety of maize using partially balanced lattice square design with two replications. Data were recorded on grain yield and other agronomic traits. Observations showed difference in half-sib families for studied traits. Among the 64 half-sib families, minimum days to 50% tasseling (51 days) were observed for HS-49 while maximum (57 days) for HS-63. Minimum days to 50% silking (56 days) were counted for HS-6 while maximum (63 days) for HS-23. Minimum days to 50% anthesis (55 days) were counted for HS-1 and HS-6 while maximum (62 days) for HS-23. Similarly, minimum ASI (-2 days) were observed in HS-1, HS-15, HS-16, HS-28 and HS-63 while maximum (2 days) in HS-48. Minimum (60 cm) ear height was recorded for HS-11 and maximum (93.5 cm) for HS-28. Minimum fresh ear weight (1.3 kg) was weighted for HS-17 while maximum (3.2 kg) for HS-21. Grain moisture was recorded minimum (19.35 %) for HS-19 and maximum (31.25%) for HS-2. HS-42 showed minimum (28 g) 100 kernel weight while HS-5 showed maximum (47 g). Grain yield was minimum (2323 kg ha-1) for HS-17 and maximum (5742 kg ha-1) for HS-21. Maximum heritability estimate (0.92) was recorded for fresh ear weight, while minimum (0.41) was observed for ear height.

Performance Evaluation of Grain Yield and Yield Related Traits in Common bean Genotypes at Yabello and Abaya, Southern Ethiopia

1970 ◽  
Vol 3 ◽  
pp. 28-34
Author(s):  
Ejigu Ejara, Wassu Mohammed, Berhanu Amsalu ◽  
Zinash Misgana, Mulatu Gabisa, Ganane Tasama
Keyword(s):  
Grain Yield ◽  
Common Bean ◽  
Agronomic Traits ◽  
Southern Ethiopia ◽  
Design Data ◽  
Nutrition Security ◽  
Lattice Design ◽  
Food And Nutrition ◽  
Borana Zone ◽  
Home Consumption

Common bean is among the major crops grown in southern Ethiopia including Borana zone where the majority of the farmers are Agro-pastoralist and produce the crop mainly for home consumption. The area has potential to the production of common bean for food and nutrition security as well as export commodity. However, scarcity of varieties that fit to the environment is one of the major constraints of production. Therefore, this experiment was conducted to evaluate 36 common bean genotypes including seven released varieties to evaluate performance of genotypes for yield and agronomic traits. The field experiment was conducted in 2015 at two locations (Abaya and Yabello) and genotypes were planted in triple lattice design. Data were collected on yield and important agronomic traits. Analysis of variance computed for individual locations and combined analysis over locations revealed significant variations among genotypes for all traits. Moreover, 16.67% of the genotypes had mean grain yield greater than the best performing released variety across locations and the genotypes showed a grain yield as high as 3.25 tons ha-1. Based on results of this study it is recommended to test the high yielding and early maturing genotypes at many locations to develop preferred varieties across many locations.

Evaluation of Agronomic Traits of Sponge Gourd (Luffa cylindrica) Inbred Lines Under Plastic House in Thua Thien Hue

2017 ◽  
Vol 126 (3E) ◽  
Author(s):  
Trương Thị Hồng Hải ◽  
Nguyễn Thị Diệu Thể ◽  
Phan Thu Thảo
Keyword(s):  
Skin Color ◽  
Agronomic Traits ◽  
Block Design ◽  
Leaf Traits ◽  
Pure Line ◽  
Inbred Lines ◽  
Fruit Shape ◽  
Yield Potential ◽  
High Yield ◽  
Sponge Gourd

In order to establish the pure line of sponge gourd containing aroma feature, we selected the desirable inbred lines by using a self-pollinating method. The present study was investigated to estimate the morphological traits and fruit quality of 6 sponge gourd inbred lines which generated at 4th generation of an aroma Luffa accession B29 under plastic house conditions. The experiment was conducted in a randomized complete block design (RCBD) with three replications, from May to November in 2016. Five plants per replication were examined. The results indicated that all inbred lines could grow well under plastic house conditions. The inbred lines had the same stem and leaf traits; whereas fruit shape, skin color and fruit veins color were observed differently among inbred lines. The aromatic trait was retained in all inbred lines either before or after cooking. The high yield was found in lines BC1 and BC2 by 10.1 tons/ha and 10.7 tons/ha, respectively. These inbred lines should be examined in open field condition to confirm the presence of aromatic trait and yield potential before completion of the procedures for recognition of new Luffa varieties.  

EVALUATION OF IMPROVED CASSAVA GENOTYPES FOR STORAGE ROOT YIELD AND POST HARVEST TRAITS IN THE NJALA SOIL SERIES

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Lansana Kamara ◽  
Fayia Kassoh ◽  
Ernest Kamara ◽  
Festus Masssaquoi ◽  
Keiwoma Yila ◽  
...  
Keyword(s):  
Storage Root ◽  
Soil Series ◽  
Root Yield ◽  
Post Harvest
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