Duration of meiosis in relation to temperature

Wilson, J. Yanney

doi:10.1038/hdy.1959.29

Cited by 20 publications

(16 citation statements)

References 9 publications

(7 reference statements)

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“…I compared the regression developed by Sarvas (1972) with Wilson's (1959) early results and found close similarities in the lower parts of the two curves ( Figure 7). Wilson's (1959) method was inaccurate for the shortest durations of meiosis, so the upper part of the curve is the least reliable. Generally, the largest differences among curvilinear regressions of this kind occur at the upper inflection of the curve.…”

Section: Discussionmentioning

confidence: 58%

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Phenological measurements of microsporogenesis in trees

Luomajoki¹

1995

Tree Physiology

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The value of two heat sum methods, one linear (degree days > 5 degrees C) and the other curvilinear (period units), were assessed together with calendar days as predictors of the duration of microsporogenesis in seven natural stands of Norway spruce (Picea abies (L.) Karst.) and eleven natural stands of Scots pine (Pinus sylvestris L.). Microsporogenesis was divided into two subperiods: March 19 to tetrads (i.e., the end of meiosis) and tetrads to anthesis. The total period from March 19 to anthesis was also assessed. The methods were compared on a calendar day basis. When annual deviations between the predicted (stand means) and the observed annual heat sums were converted to days, the period unit method outperformed the other methods for both subphases and for the total period of microsporogenesis. The degree day parameter was more variable but a better predictor of the duration of the initial phase up to tetrads and of the total period than the calendar day parameter, but the calendar day parameter more accurately predicted the duration of the subphase from tetrads to anthesis. The heat sum methods were better predictors of the duration of development of microsporogenesis in exceptionally cold or warm years than the calendar day method.

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Section: Discussionmentioning

confidence: 58%

“…Figure 7. The rate of development on temperature during the 'active period' (Sarvas 1972) compared with Wilson's (1959) results from the progress of the meiosis in Endymion. The regressions were made to unite at 10 °C after calculating the relative rates of development from Wilson's data (circles; curve-fitting by the author).…”

Section: Discussionmentioning

confidence: 99%

Phenological measurements of microsporogenesis in trees

Luomajoki¹

1995

Tree Physiology

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“…Environmental factors such as temperature and photoperiod play an Important role in determining the rate of microspore develop ment. Bennett, Smith and Kemble (1972), Bennett (1973a) and Wilson (1959) reported that a negative relationship between temperature and the duration of melosls within certain temperature ranges. Leng Bonnett (1966) reported that there is a critical time period in several cereals when the maximum effect of growth factors occurs.…”

Section: Discussionmentioning

confidence: 99%

“…'s) of different angiosperm species grown at about 20°C ranges from 1 day (Haplopappus gracilis) to about 1 month (Fritlllaria meleagris). Wilson (1959) Table 2.5. The data were collected from three reports - Finch and Bennett, 1972;Bennett and Kaltsikes, 1973. From Table 2.5, it is evident that first prophase of meiosis in higher plants occupies the major portion of the total melotlc time;…”

Section: Duration Of Meiosismentioning

confidence: 99%

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Microspore development in maize: the maturation of upper and lower flowers among an assortment of genotypes

Hsu

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2.3. Stage Duration in MSG 54 3. MATERIALS AND METHODS 72 3.1. Statistical Symbols and Definition 72 of Terms 3.2. The Tassel and Male Spikelet of Zea Mays 76 3.3. Classification of Each Stage of 76 Microsporogenesis (MSG) 3.4. Genotype Classification 81 3.5. Classification of Tassel Maturity and 84 Spikelet Position 3.6. Field Experiment Design 84 3.7. Sampling and Microsporocyte Techniques 85 3.8. Methods in Anthesls Investigation 86 3.9. Methods in Data Processing 88 3.10. Methods in Statistical Analysis 89 4. RESULTS 99 4.1. Microsporogenesis (MSG) 100 4.2. Relationship Between Upper (U) and 127 Lower (L) Flowers in the Development of Microspores ill Page 4.3. Influence of Genotype Groups, Genotypes, 143 Tassel Maturities and Spikelet Positions on the Relationship Between Upper and Lower Flowers in the Development of Microspores 4.4. Influence of Interaction Effects on the 172 Relationship Between Upper and Lower Flowers in the Development of Microspores 4.5. Anthesis

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Cytogenetik

Röbbelen¹

1960

Bericht Über Das Jahr 1959

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Duration of meiosis in relation to temperature

Cited by 20 publications

References 9 publications

Phenological measurements of microsporogenesis in trees

Phenological measurements of microsporogenesis in trees

Microspore development in maize: the maturation of upper and lower flowers among an assortment of genotypes

Cytogenetik

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