Staining techniques to ascertain CMS/FR system in maize (Zea mays L.) for hybrid development

2018 ◽  
Vol 5 (03) ◽  
Author(s):  
ISHFAQ ABIDI ◽  
G ALI ◽  
ZA DAR ◽  
SHABIR H WANI ◽  
ASIF M IQBAL ◽  
...  
Keyword(s):  
Seed Production ◽  
Female Parent ◽  
Production Costs ◽  
Hybrid Seed Production ◽  
Maize Seed ◽  
Maize Pollen ◽  
Seed Industry ◽  
Great Utility ◽  
Staining Techniques ◽  
Hybrid Maize

The major hurdle impeding the wide adoption of hybrid maize, in developing countries particularly in high altitudes of Indian Himalayas has been the cost consideration. Hybrid maize seed is generally 4-10 times more expensive than the seed of OPVs and often beyond the purchasing power of poor farmers who have limited resources and little access to the credit facilities. The seed production costs, therefore, need to be reduced drastically to make it available to the farmers at affordable prices. Currently, the hybrid maize seed is produced by detasseling of seed parent is labour intensive and costs 280-300 US dollars per hectare. Cytoplasmic male sterility (genetic emasculation) therefore, has been looked since long back as a sound and sustainable alternative to bring down the hybrid seed production costs besides adding purity to the end product. CMS plants are characterized by their inability to produce viable pollen while having little or no effect on female fertility. The unique pattern of inheritance (CMS is transmitted only through female parent) has enabled the CMS trait to be of great utility to plant breeders and the commercial seed industry. Staining techniques used in present investigation helped in the objective classification of maize pollen into fertile and sterile phenotypes in maize.

scholarly journals Profitability of Hybrid Maize (Zea mays L.) Seed Production Under Contract Farming in Bangladesh: A Farm Level Study

2012 ◽  
Vol 37 (2) ◽  
pp. 327-334 ◽  
Author(s):  
MA Haque ◽  
Monir Uz Zaman ◽  
MS Rahman ◽  
QM Alam
Keyword(s):  
Seed Production ◽  
Hybrid Seed ◽  
High Price ◽  
Cost Ratio ◽  
Hybrid Seed Production ◽  
Maize Seed ◽  
Private Company ◽  
Public Agency ◽  
Net Return ◽  
Hybrid Maize

The study was conducted with three catagories of seed producers, namely BADC farms at Dattanagar, Jhenaidah and Tabunia, Pabna as public agency, LAL TEER Seed Company in Lalmonirhat district as private company and BRAC farm in Bogra district as NGO during Rabi season of 2007-08 to know the present status and profitability of hybrid maize seed production. A total of 60 hybrid maize seed contract growers and 120 maize (Non-seed) growers were selected randomly for the study. The cost of production was found higher for NGO (Tk. 66472/ha) than the public agency (64836/ha) and private company (Tk. 59352/ha). The yield of hybrid seed was highest under NGO (3780 kg/ha) than that of public agency and private company. Net return of hybrid seed production for contract growers was higher under public agency (Tk. 78204/ha) compared to private company (Tk. 39088/ha) and NGO (Tk. 33246/ha). Benefit cost ratio (BCR) was higher for the contract growers of public agency (2.21) Net return of hybrid maize seed production was 50% higher than that of non-seed production. High price of seed and lack of technical knowledge were major constraints of hybrid maize seed production in the study areas. DOI: http://dx.doi.org/10.3329/bjar.v37i2.11237 Bangladesh J. Agril. Res. 37(2): 327-334, June 2012    

Simulating kernel number under different water regimes using the Water-Flowering Model in hybrid maize seed production

2018 ◽  
Vol 209 ◽  
pp. 188-196 ◽  
Author(s):  
Jintao Wang ◽  
Shaozhong Kang ◽  
Xiaotao Zhang ◽  
Taisheng Du ◽  
Ling Tong ◽  
...  
Keyword(s):  
Seed Production ◽  
Maize Seed ◽  
Kernel Number ◽  
Water Regimes ◽  
Hybrid Maize

scholarly journals Effects of irrigation and nitrogen management on hybrid maize seed production in north-west China

2016 ◽  
Vol 3 (1) ◽  
pp. 55 ◽  
Author(s):  
Hui RAN ◽  
Shaozhong KANG ◽  
Fusheng LI ◽  
Ling TONG ◽  
Taisheng DU
Keyword(s):  
Seed Production ◽  
Nitrogen Management ◽  
Maize Seed ◽  
West China ◽  
North West ◽  
Hybrid Maize

Joint optimization of irrigation and planting pattern to guarantee seed quality, maximize yield, and save water in hybrid maize seed production

2020 ◽  
Vol 113 ◽  
pp. 125970 ◽  
Author(s):  
Jintao Wang ◽  
Shanshan Guo ◽  
Shaozhong Kang ◽  
Yufeng Wang ◽  
Taisheng Du ◽  
...  
Keyword(s):  
Seed Production ◽  
Seed Quality ◽  
Joint Optimization ◽  
Maize Seed ◽  
Planting Pattern ◽  
Hybrid Maize

scholarly journals Greenhouse gas emissions and mitigation potential of hybrid maize seed production in northwestern China

2021 ◽  
Author(s):  
Dan Liu ◽  
Wushuai Zhang ◽  
Xiaozhong Wang ◽  
Yanjun Guo ◽  
Xinping Chen
Keyword(s):  
Greenhouse Gas ◽  
Seed Production ◽  
Carbon Footprint ◽  
Ghg Emissions ◽  
Electricity Consumption ◽  
Northwest China ◽  
Mitigation Measures ◽  
Maize Seed ◽  
Quantitative Evidence ◽  
Hybrid Maize

Abstract Although hybrid maize seed production is one of the most important agriculture systems worldwide, its greenhouse gas (GHG) emissions and potential mitigation measures have not been studied. In this study, we used life cycle assessment (LCA) to quantify the GHG emissions of 150 farmers run by 6 companies in an area of northwest China known for hybrid maize seed production. The results indicated that the average reactive nitrogen (Nr) losses and GHG emissions from hybrid maize seed production were 53 kg N ha− 1 and 8077 kg CO2 eq ha− 1, respectively, which are higher than those of the conventional maize production system. Furthermore, the average nitrogen and carbon footprints of the process were 12.2 kg N Mg− 1 and 1495 kg CO2 eq Mg− 1, respectively. Nitrogen fertilizer and electricity consumption for irrigation were the main contributors to high GHG emissions, accounting for 60% and 30% of the total, respectively. The GHG emissions from seed production for different companies varied greatly with their resource input. There was also a large variation in environmental burdens among the 150 farmers. Based on an analysis of the yield group, we found that the carbon footprint of the first group (the one with the highest yield) was 27% lower than the overall average. Scenario analysis suggests that a combined reduction of N input rate, optimizing irrigation, and increasing yield can eventually mitigate the carbon footprint of hybrid maize seed production by 37%. An integrated systematic approach (e.g., ISSM: integrated soil-crop system management) can reduce the GHG emissions involved in producing hybrid maize seeds. This study provides quantitative evidence and a potential strategy for GHG emissions reduction of hybrid maize seed production.

Estimating the upper and lower limits of kernel weight under different water regimes in hybrid maize seed production

2019 ◽  
Vol 213 ◽  
pp. 128-134 ◽  
Author(s):  
Jintao Wang ◽  
Shaozhong Kang ◽  
Taisheng Du ◽  
Ling Tong ◽  
Risheng Ding ◽  
...  
Keyword(s):  
Seed Production ◽  
Kernel Weight ◽  
Maize Seed ◽  
Water Regimes ◽  
Hybrid Maize ◽  
Lower Limits

Modeling kernel weight of hybrid maize seed production with different water regimes

2021 ◽  
Vol 250 ◽  
pp. 106851
Author(s):  
Rongchao Shi ◽  
Ling Tong ◽  
Risheng Ding ◽  
Taisheng Du ◽  
Manoj Kumar Shukla
Keyword(s):  
Seed Production ◽  
Kernel Weight ◽  
Maize Seed ◽  
Water Regimes ◽  
Hybrid Maize

scholarly journals Incorporating Male Sterility Increases Hybrid Maize Yield in Low Input African Farming Systems

2021 ◽  
Author(s):  
Sarah Collinson ◽  
Esnath Hamidziripi ◽  
Hugo De Groote ◽  
Michael Ndegwa ◽  
Jill Cairns ◽  
...  
Keyword(s):  
Seed Production ◽  
Farming Systems ◽  
Maize Yield ◽  
Sub Saharan Africa ◽  
Hybrid Seed Production ◽  
Seed Systems ◽  
Sub Saharan ◽  
Hybrid Maize ◽  
The Cost ◽  
Staple Crop

Abstract Maize is a staple crop in sub-Saharan Africa, but yields remain sub-optimal. Improved breeding and seed systems are vital to increase productivity. We describe a novel hybrid seed production technology that will benefit seed companies and farmers. This technology reduces the cost of seed production by preventing the need for detasseling. The resulting hybrids segregate 1:1 for pollen production, conserving resources for grain production and conferring a 200 kg ha-1 benefit across a range of yield levels. This represents a 10% increase for farmers operating at national average yield levels in sub-Saharan Africa. The yield benefit of fifty-percent non-pollen producing hybrids is equivalent to approximately six years of progress in plant breeding. Benefits to seed companies in the form of reduced production cost and improved seed purity will provide incentives to improve smallholder farmer access to higher quality seed of climate-smart hybrids. Demonstrated farmer preference for these hybrids will help drive their adoption.

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