LOW-TEMPERATURE TOLERANCE OF OCTOPLOID TRITICALE AND ITS PARENTAL SPECIES GROWN IN SOUTHERN ONTARIO

1984 ◽  
Vol 64 (3) ◽  
pp. 451-456 ◽  
Author(s):  
V. W. POYSA ◽  
C. J. KNOBLAUCH ◽  
B. D. McKERSIE ◽  
E. REINBERGS
Keyword(s):  
Triticum Aestivum ◽  
Low Temperature ◽  
Secale Cereale ◽  
Triticum Aestivum L ◽  
Temperature Tolerance ◽  
Intergeneric Hybridization ◽  
Southern Ontario ◽  
Low Temperature Tolerance ◽  
Secale Cereale L ◽  
Octoploid Triticale

The low-temperature tolerance of 25 octoploid triticale (× Triticosecale Wittmack) lines and their five wheat (Triticum aestivum L. em. Thell) and five rye (Secale cereale L.) parental cultivars was evaluated in controlled freezing tests following field acclimation in southern Ontario. The average LT50 rating of triticale was 1–2 °C inferior to that of wheat and rye. Triticale synthesized from very hardy rye did not have better levels of hardiness than triticale from less hardy rye. The raw primary octoploid triticale lines were generally less cold tolerant than their hardy wheat parents. The LT50 rating of triticale was not significantly correlated with the LT50 rating of either the wheat or the rye parent.Key words: Triticum aestivum L. em. Thell., Secale cereale L., cold hardiness, intergeneric hybridization

PARENTAL EFFECTS ON CHROMOSOME DOUBLING FOR THE PRODUCTION OF PRIMARY TRITICALE

1981 ◽  
Vol 23 (2) ◽  
pp. 191-193 ◽  
Author(s):  
D. G. Tanner
Keyword(s):  
Triticum Aestivum ◽  
Secale Cereale ◽  
Hexaploid Wheat ◽  
Chromosome Doubling ◽  
Colchicine Treatment ◽  
Triticum Aestivum L ◽  
Intergeneric Hybridization ◽  
Parental Effects ◽  
Secale Cereale L ◽  
Independent Effects

Intergeneric hybridization between six hexaploid wheat (Triticum aestivum L.) cultivars and five inbred rye (Secale cereale L.) lines was used to study the influence of parental genotypes upon chromosome doubling after colchicine treatment. Significant differences were attributed to independent effects of the wheat and rye parents. Self-fertility of the derived amphidiploids was positively correlated with colchicine responsiveness.

The effect of cytoplasm on cold hardiness in alloplasmic rye (Secale cereale L.) and triticale

1984 ◽  
Vol 26 (4) ◽  
pp. 405-408 ◽  
Author(s):  
A. E. Limin ◽  
D. B. Fowler
Keyword(s):  
Triticum Aestivum ◽  
Secale Cereale ◽  
Cold Hardiness ◽  
Triticum Aestivum L ◽  
Complete Suppression ◽  
Cytoplasmic Effects ◽  
Secale Cereale L ◽  
Triticosecale Wittmack ◽  
Octoploid Triticale ◽  
Wheat Parent

Many changes occur within the cytoplasm of plant cells during cold acclimation. However, the cause and effect relationship between cytoplasmic response to low temperature and the development of cold hardiness in cells has been difficult to determine. This study considered the importance of rye (Secale cereale L.) and wheat (Triticum aestivum L. and Triticum tauschii (Coss.) Schmal.) cytoplasmic effects in conditioning plant cold hardiness. The cold hardiness of octoploid triticale (× Triticosecale Wittmack) produced from hardy rye and nonhardy wheat was similar to that of the wheat parent, demonstrating a complete suppression of the rye cold hardiness genes. Similar observations were made for wheat – rye amphiploids from reciprocal crosses, indicating that this suppression was not due to cytoplasmic effects. It is more probable that, because the cold hardiness of octoploid triticale approximates that of the wheat parent, the cold hardiness potential of the rye genome is suppressed by a gene or genes in the wheat complement. The cold hardiness of alloplasmic rye with T. tauschii cytoplasm was similar to that of the rye parent indicating that the cold hardiness genes of rye have normal expression in the T. tauschii cytoplasm. Based on observations made in these two studies, it was concluded that the cytoplasm has little direct effect on cold hardiness, or on the nuclear expression of cold hardiness.Key words: cold hardiness, cytoplasm, Triticum aestivum L., triticale, alloplasmic rye.

Morphological and cytological characters associated with low-temperature tolerance in wheat (Triticum aestivum L. em Thell.)

2000 ◽  
Vol 80 (4) ◽  
pp. 687-692 ◽  
Author(s):  
A. E. Limin ◽  
D. B. Fowler
Keyword(s):  
Triticum Aestivum ◽  
Low Temperature ◽  
Stress Tolerance ◽  
Cell Size ◽  
Plant Morphology ◽  
Triticum Aestivum L ◽  
Temperature Tolerance ◽  
Leaf Length ◽  
Low Temperature Tolerance ◽  
Highly Correlated

Attempts to associate morphological or cytological characters with low-temperature (LT) tolerance in wheat (Triticum aestivum L. em. Thell.) and other members of the Triticeae group have met with ambiguous or contradictory results. Consequently no single character has emerged that can be considered a reliable predictor of LT tolerance. Twenty-six winter wheat cultivars of diverse origin were analyzed to determine the association among leaf length, width, area and cell size (guard cell length) and their association with LT stress tolerance. Measurements were made on plants grown at 4 °C and at 17 °C to determine if expression of LT tolerance associated characters was temperature dependent. At 4 °C, all individual leaf characters measured, including cell size, were very highly correlated with LT tolerance and with each other. Undisturbed plant height was not significantly correlated with LT tolerance until 5 wk of growth at 4 °C and reached its highest correlation at 10 wk when the plants were on average at their most prostrate state of growth. Growth at 17 °C resulted in much weaker relationships among all characters. At 4 °C short narrow leaves and small cell size were the best indicators of LT stress tolerance. Prostrate growth habit of plants grown at LT was also a good indicator of plant LT tolerance, but measurements of this character did not improve prediction equations based on leaf characters and cell size. Key words: Low-temperature tolerance, plant morphology, cell size, leaf characteristics, Triticum aestivum

scholarly journals Tolerância de cultivares de trigo, triticale e centeio em diferentes níveis de alumínio em solução nutritiva

Bragantia ◽  
1984 ◽  
Vol 43 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Carlos Eduardo de Oliveira Camargo ◽  
João Carlos Fenício
Keyword(s):  
Triticum Aestivum ◽  
Secale Cereale ◽  
Triticum Durum ◽  
Triticum Aestivum L ◽  
Secale Cereale L

Foram estudados sete cultivares de trigo (Triticum aestivum L. ), um de trigo duro (Triticum durum L.), sete de triticale e dois de centeio (Secale cereale L.), em soluções nutritivas contendo quatro níveis de alumínio tóxico. A tolerância foi medida pela capacidade de as raízes primárias continuarem a crescer em soluçâo sem alumínio após um período de 48 horas em solução contendo uma concentração conhecida de alumínio. A temperatura de 28 ± 1 °C foi mantida constante nas soluções durante o experimento. Os cultivares de centeio, Goyarowo e Branco, foram tolerantes a 20mg/ litro de Al3+; os de trigo, Siete Cerros, Tobari-66 e Cocorit, foram sensíveis a 5mg/lítro de alumínio, porém BH-1146, IAC-5, BR-1 e IAC-18 foram tolerantes e, IAC-17, moderadamente tolerante a essa concentração de alumínio; os cultivares de triticale, PFT-763, TCEP-77142, PFT-764, TCEP-75709, Cynamon, TCEP-77138 e TCEP-77136, foram tolerantes a 5mg/litro de Al3+. Todos os cultivares de trigo e triticale foram sensíveis a 10mg/litro de Al3+.

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