Production of triticale (X Triticosecale Wittm.) hybrid seeds using the sterilizing cytoplasm of Triticum timopheevi

2002 ◽  
Vol 30 (1-2) ◽  
pp. 31-38 ◽  
Author(s):  
Halina Góral
Keyword(s):  
Triticum Timopheevi ◽  
X Triticosecale ◽  
Hybrid Seeds

scholarly journals Molecular variation in chloroplast DNA regions in ancestral species of wheat.

Genetics ◽  
1994 ◽  
Vol 137 (3) ◽  
pp. 883-889 ◽  
Author(s):  
N T Miyashita ◽  
N Mori ◽  
K Tsunewaki
Keyword(s):  
Chloroplast Dna ◽  
Restriction Enzymes ◽  
Triticum Dicoccoides ◽  
The Other ◽  
Major Type ◽  
Aegilops Speltoides ◽  
Triticum Timopheevi ◽  
Restriction Sites ◽  
D Values ◽  
Chloroplast Dna Regions

Abstract Restriction map variation in two 5-6-kb chloroplast DNA regions of five diploid Aegilops species in the section Sitopsis and two wild tetraploid wheats, Triticum dicoccoides and Triticum araraticum, was investigated with a battery of four-cutter restriction enzymes. A single accession each of Triticum durum, Triticum timopheevi and Triticum aestivum was included as a reference. More than 250 restriction sites were scored, of which only seven sites were found polymorphic in Aegilops speltoides. No restriction site polymorphisms were detected in all of the other diploid and tetraploid species. In addition, six insertion/deletion polymorphisms were detected, but they were mostly unique or species-specific. Estimated nucleotide diversity was 0.0006 for A. speltoides, and 0.0000 for all the other investigated species. In A. speltoides, none of Tajima's D values was significant, indicating no clear deviation from the neutrality of molecular polymorphisms. Significant non-random association was detected for three combinations out of 10 possible pairs between polymorphic restriction sites in A. speltoides. Phylogenetic relationship among all the plastotypes (plastid genotype) suggested the diphyletic origin of T. dicoccoides and T. araraticum. A plastotype of one A. speltoides accession was identical to the major type of T. araraticum (T. timopheevi inclusively). Three of the plastotypes found in the Sitopsis species are very similar, but not identical, to that of T. dicoccoides, T. durum and T. aestivum.

NoKalb Genetics (Pakistan) Limited: Supply Chain Management

2003 ◽  
Vol 07 (01) ◽  
pp. 43-66
Author(s):  
Arif Iqbal Rana
Keyword(s):  
Supply Chain ◽  
Supply Chain Management ◽  
Capital Requirements ◽  
Raw Material ◽  
Working Capital ◽  
Chain Management ◽  
Retail Outlets ◽  
Hybrid Seeds ◽  
Limited Supply ◽  
A Chain

This case is about the Supply Chain of a pesticides producer (disguised as a hybrid seeds producer) that imported the raw material for its pesticides from its mother company in Switzerland, formulated and packed it in Karachi, and sold it throughout Pakistan. The company had two large warehouses in the country, many regional ware-houses, and a chain of retail outlets throughout the country. The company had been steadily losing market share to cheaper "generics" in the last 15 years. The company had also changed hands a few times in the last ten years and had been under pressure to reduce working capital requirements. The case looks at the typical challenges in supply chain management.

scholarly journals Genome-wide evaluation of genetic diversity and linkage disequilibrium in winter and spring triticale (x Triticosecale Wittmack)

BMC Genomics ◽  
2012 ◽  
Vol 13 (1) ◽  
pp. 235 ◽  
Author(s):  
Katharina V Alheit ◽  
Hans Maurer ◽  
Jochen C Reif ◽  
Matthew R Tucker ◽  
Volker Hahn ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Linkage Disequilibrium ◽  
X Triticosecale ◽  
Genome Wide ◽  
Spring Triticale ◽  
Triticosecale Wittmack ◽  
X Triticosecale Wittmack

Triticale (x Triticosecale Wittmack) Breeding

2019 ◽  
pp. 405-451
Author(s):  
Mohamed Mergoum ◽  
Suraj Sapkota ◽  
Ahmed ElFatih A. ElDoliefy ◽  
Sepehr M. Naraghi ◽  
Seyed Pirseyedi ◽  
...  
Keyword(s):  
X Triticosecale ◽  
Triticosecale Wittmack ◽  
X Triticosecale Wittmack

scholarly journals Interspecific Hybridization Processes between Michelia yunnanensis and M. crassipes and Embryogenesis of the Heterozygote

HortScience ◽  
2017 ◽  
Vol 52 (8) ◽  
pp. 1043-1047
Author(s):  
Haiyan Xu ◽  
Folian Li ◽  
Yuezhi Pan ◽  
Xun Gong
Keyword(s):  
Reciprocal Cross ◽  
Embryo Sac ◽  
Pollen Grains ◽  
Blue Staining ◽  
Formation Processes ◽  
Callose Deposition ◽  
Cross Compatibility ◽  
Direct Cross ◽  
Hybrid Seeds ◽  
Aniline Blue Staining

The investigation of hybridization processes and embryogenesis of heterozygote is an effective approach for early hybrids’ identification, which could provide reliable information for successful crossbreeding. In this study, we reported the whole hybridization processes of the direct cross and reciprocal cross between Michelia yunnanensis Franch. ex Finet et Gagnep. and Michelia crassipes Law using fluorescence microscopy after aniline blue staining, with the pollen germination on stigmas, pollen tube growth in styles, and subsequent extension into the embryo sac as well as the double fertilization processes are documented in detail. The M. yunnanensis × M. crassipes combination displayed considerable cross-compatibility, and the heterozygote embryogenesis was further observed with an approach of modified cryosectioning technique. Besides, the whole formation processes of hybrid seeds from artificial pollination to maturation were successfully observed. However, in the reciprocal cross, we found incompatibility between pollen grains of M. yunnanensis and stigmas of M. crassipes for the reason of hysteretic identification, as well as the abnormal callose deposition which belongs to the prefertilization barriers. This is the first study in which the complete and clear hybridization processes in Michelia were reported. We inferred that unilateral incompatibility of M. crassipes detected in this study may also exist in some other Michelia species. In artificial hybridization practices, we suggest some special treatments for overcoming prefertilization barrier should be taken when treating M. crassipes as the maternal parent.

scholarly journals Comparação entre métodos para a avaliação do vigor de lotes de sementes de triticale

2011 ◽  
Vol 41 (2) ◽  
pp. 200-204 ◽  
Author(s):  
Fábio Steiner ◽  
Silvia Sanielle Costa de Oliveira ◽  
Cibele Chalita Martins ◽  
Sihélio Júlio Silva Cruz
Keyword(s):  
X Triticosecale ◽  
Triticosecale Wittmack ◽  
X Triticosecale Wittmack

Dentro de um programa de controle de qualidade, a avaliação do vigor de sementes é fundamental e necessária para o sucesso da produção. Este trabalho teve como objetivo avaliar a eficiência de diferentes testes de vigor na avaliação da qualidade fisiológica de sementes de triticale (X. triticosecale Wittmack), buscando a diferenciação de lotes. Cinco lotes da cultivar 'IPR 111' foram submetidos ao teste de germinação, primeira contagem, teste de frio, condutividade elétrica (50 sementes 50mL-1 de água; 25°C 24h-1), lixiviação de potássio (50 sementes 75mL-1 de água; 25°C 3h-1), envelhecimento acelerado (43°C 48h-1) e teor de água. O teste de condutividade elétrica e lixiviação de potássio são eficientes na diferenciação do vigor de lotes de sementes de triticale.

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