Abstract
Egyptian cotton growers are facing an unavoidable problem of late planting of cotton. To address such problem, four barbadense genotypes; two long staple [cultivar G86 and promising line of the cross (10229 x Giza 86)] and two extra long staple [cultivar G88 and promising line of the cross (Giza 84x G70xG51BxPima62)] were grown in three planting dates (April 15, April 30 and May15) at Nile Delta cotton zone, Egypt, during two successive seasons 2012 and 2013. Research objectives were to determine planting date effects on the performance of selected genotypes, data variability, and relation with air thermal units. The results showed that the PDs and genotypes had less effect on the data normality in both seasons with few exceptions. Slightly negative to positive skewness and kurtosis were observed. Moderate to high variability (CV %) was observed in yield determinants; while moderate to low variability existed in fiber and yarn determinants. Planting date (PD) and genotype (G) influenced significantly (P<0.01) yield, fiber and yarn variables. However, the PD x G interaction was not significant for most lint and yarn traits. With the exception of plant height and yarn evenness, mean performance of yield and fiber determinants of genotypes declined by delaying planting date. The delayed planting from 30 April to 15 May had more adverse effect on most traits than the delayed planting from 15 to 30 April. For example, seed cotton yield per plant lost 6.38 and 9.15 gm in the first season compared with 8.14 and 8.47 gm in the second season due to the first and second 15-day delay of planting, respectively. Except for yarn traits, response curves showed linearly negative effects of delaying planting on cotton yield and fiber traits in the two seasons. The two promising crosses were significantly better than their corresponding cultivars especially in yield and its attributes. Averaged over the two seasons, heat units efficiency use (HUE) measured as a number of open bolls/plant corresponded to each accumulated heat unit (AHU) were 106.14, 129.15 and 164.41 hu/boll for the first, second and third planting dates, respectively. Discussion on yield and its attributes, fiber and yarn properties pointed out that the two promising crosses possessed potential to tolerate conditions of late planting, suggesting their use to replace the present cultivars and utilize in breeding program aimed at developing barbadense genotypes to grow under late planting of agroclimatic conditions of the River Nile Delta.
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Claims 17
Claim · model-written summary
Delaying planting date declined the mean performance of yield and fiber determinants of barbadense genotypes, except plant height and yarn evenness.
- Taxon
- barbadense cottonst0
- Treatment
- delaying planting datee6
- Outcome
- mean performance of yield and fiber determinants of genotypese6
- Direction
- declinede6
- Qualifier
- With the exception of plant height and yarn evennesse6
Not reportedComparator
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e6“With the exception of plant height and yarn evenness, mean performance of yield and fiber determinants of genotypes declined by delaying planting date”
Claim · model-written summary
Delaying planting from 30 April to 15 May had a more adverse effect on most traits than delaying planting from 15 to 30 April.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e7“The delayed planting from 30 April to 15 May had more adverse effect on most traits than the delayed planting from 15 to 30 April”
Claim · model-written summary
The first and second 15-day planting delays reduced seed cotton yield per plant by 6.38 and 9.15 gm in the first season.
- Taxon
- barbadense cottonst0
- Treatment
- first and second 15-day delay of plantinge0
- Outcome
- seed cotton yield per plante0
- Direction
- loste0
- Value
- 6.38 and 9.15 gme0
- Setting
- first seasone0
Not reportedComparator
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“For example, seed cotton yield per plant lost 6.38 and 9.15 gm in the first season compared with 8.14 and 8.47 gm in the second season due to the first and second 15-day delay of planting, respectively”
Claim · model-written summary
The first and second 15-day planting delays reduced seed cotton yield per plant by 8.14 and 8.47 gm in the second season.
- Taxon
- barbadense cottonst0
- Treatment
- first and second 15-day delay of plantinge0
- Outcome
- seed cotton yield per plante0
- Direction
- loste0
- Value
- 8.14 and 8.47 gme0
- Setting
- second seasone0
Not reportedComparator
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“For example, seed cotton yield per plant lost 6.38 and 9.15 gm in the first season compared with 8.14 and 8.47 gm in the second season due to the first and second 15-day delay of planting, respectively”
Claim · model-written summary
Delaying planting had linearly negative effects on cotton yield and fiber traits in both seasons, except yarn traits.
- Taxon
- barbadense cottonst0
- Treatment
- delaying plantinge0
- Outcome
- cotton yield and fiber traitse0
- Direction
- linearly negative effectse0
- Qualifier
- Except for yarn traitse0
Not reportedComparator
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“Except for yarn traits, response curves showed linearly negative effects of delaying planting on cotton yield and fiber traits in the two seasons”
Claim · model-written summary
Planting date and genotype influenced yield, fiber and yarn variables significantly (P<0.01).
- Taxon
- barbadense cottonst0
- Treatment
- Planting date (PD) and genotype (G)e4
- Outcome
- yield, fiber and yarn variablese4
- Qualifier
- P<0.01e4
Not reportedComparatorDirection
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e4“Planting date (PD) and genotype (G) influenced significantly (P<0.01) yield, fiber and yarn variables”
Claim · model-written summary
The planting date x genotype interaction was not significant for most lint and yarn traits.
Not reportedDirection
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e5“However, the PD x G interaction was not significant for most lint and yarn traits”
Claim · model-written summary
Yield determinants of barbadense cotton showed moderate to high variability (CV %).
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e3“Moderate to high variability (CV %) was observed in yield determinants”
Claim · model-written summary
Fiber and yarn determinants of barbadense cotton showed moderate to low variability (CV %).
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e3“while moderate to low variability existed in fiber and yarn determinants”
Claim · model-written summary
Planting date and genotype had less effect on data normality, with few exceptions.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e1“The results showed that the PDs and genotypes had less effect on the data normality in both seasons with few exceptions”
Claim · model-written summary
Skewness and kurtosis were slightly negative to positive.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e2“Slightly negative to positive skewness and kurtosis were observed”
Claim · model-written summary
The two promising crosses were significantly better than their corresponding cultivars, especially in yield and its attributes.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“The two promising crosses were significantly better than their corresponding cultivars especially in yield and its attributes”
Claim · model-written summary
Heat units efficiency use (HUE) was 106.14 hu/boll for the first planting date, averaged over two seasons.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“Averaged over the two seasons, heat units efficiency use (HUE) measured as a number of open bolls/plant corresponded to each accumulated heat unit (AHU) were 106.14, 129.15 and 164.41 hu/boll for the first, second and third planting dates, respectively”
Claim · model-written summary
Heat units efficiency use (HUE) was 129.15 hu/boll for the second planting date, averaged over two seasons.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“Averaged over the two seasons, heat units efficiency use (HUE) measured as a number of open bolls/plant corresponded to each accumulated heat unit (AHU) were 106.14, 129.15 and 164.41 hu/boll for the first, second and third planting dates, respectively”
Claim · model-written summary
Heat units efficiency use (HUE) was 164.41 hu/boll for the third planting date, averaged over two seasons.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“Averaged over the two seasons, heat units efficiency use (HUE) measured as a number of open bolls/plant corresponded to each accumulated heat unit (AHU) were 106.14, 129.15 and 164.41 hu/boll for the first, second and third planting dates, respectively”
Claim · model-written summary
The two promising crosses possess potential to tolerate conditions of late planting.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“the two promising crosses possessed potential to tolerate conditions of late planting”
Claim · model-written summary
The two promising crosses should be used to replace the present cultivars and in breeding for late planting.
Verbatim
t0“ATTAINING ONE MONTH -LATE- PLANTING OF BARBADENSE COTTONS GROWN IN THE RIVER NILE DELTA”
e0“suggesting their use to replace the present cultivars”