Measurement of Earliness in Upland Cotton

Anjum, Rehana; ., A. R. Soomro; Chang, Muhammad Ali

doi:10.3923/pjbs.2001.462.463

Cited by 8 publications

(1 citation statement)

References 2 publications

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“…Aside from the spatial distribution of bolls, cotton earliness could be determined by how early the plant initiates squares, the duration of flowering period, and length of time required for the boll to mature (Anjum et al, 2001;Bednarz & Nichols, 2005). Claims have been made that soaking cotton seeds in MC could promote leaf initiation during the late seedling period (Zhang et al, 1994), and the development of squares was hastened by MC application (He et al, 1991;Gwathmey & Craig, 2003).…”

Section: Crop Sciencementioning

confidence: 99%

Multiple applications of mepiquat chloride enhanced development of plant‐wide fruits from square initiation to boll opening in cotton

Liao

Ren

et al. 2021

Crop Science

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Mepiquat chloride (MC) has been widely used for the field management of cotton (Gossypium hirsutum L.) and could enhance yield and quality. However, it is not completely clear how MC influences cotton development. A field study was conducted during 2011∼2012 cotton growing seasons to determine the effects of multiple MC applications (from the late seedling stage to near cutout) on the development of each fruit by calendar days and thermal time. Two cotton cultivars (GX3 and XK4) were used for the study. The MC application significantly hastened the appearance of squares across fruiting positions by 0.4-2.9 d in 2011; and those on upper (from the 11th) fruiting branches and on inner (first two) fruiting nodes of middle (5th-10th) fruiting branches under MC treatment formed 1.8-3.8 d earlier in 2012 compared with control. Also, MC decreased the duration from squaring to flowering by 0.1-0.3 d, and that from bloom to boll opening by 0.9-2.1 d. The MC application reduced the growing degree days (GDD) of most fruiting positions from planting to squaring owing to the early onset of squares. However, it increased the GDD of cotton bolls on the upper fruiting branches during maturation period, presumably due to their early set which exposed them to the higher temperatures during development. These results have improved our understanding of MC-induced earliness in cotton and could help growers to optimize earliness management. INTRODUCTIONCotton (Gossypium hirsutum L.) is an inherently indeterminate crop; its vegetative and reproductive growth continues simultaneously over a lengthy period (Chen & Dong, 2016). Cotton growth and maturity are highly dependent on the environmental condition and field management (Schaefer et al., 2017;Zhao & Oosterhuis, 2000). Late maturity was often observed during abnormal climate conditions which adversely affected cotton yield and sowing of subsequent crops (Du Abbreviations: GDD, growing degree days; MC, mepiquat chloride.

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Section: Crop Sciencementioning

confidence: 99%

Multiple applications of mepiquat chloride enhanced development of plant‐wide fruits from square initiation to boll opening in cotton

Liao

Ren

et al. 2021

Crop Science

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Management practices to control premature senescence in Bt cotton

Bilal

Saleem

Wahid

et al. 2017

Journal of Plant Nutrition

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Combining ability and heterosis for earliness characters in line×tester population of Gossypium hirsutum L.

Başbağ

Ekinci²,

Gençer

2007

Hereditas

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The objective of this study was to estimate the general combining ability of the parents and specific combining ability of hybrids for earliness traits for line selection. Inheritance and interrelationships of earliness characters were evaluated in a line x tester design. Three intermediate-early-maturing female (lines) which are grown regionally and four early-maturing males (testers) cotton varieties were crossed in 2003. The twelve F(1) and seven parents were planted randomized block design with three replications in 2004. For each earliness trait, general combining ability (GCA) and specific combining ability and gene effects were estimated using the line x tester method of analysis and also were determined heterosis and narrow sense heritability. Parents and their hybrids (except the monopodial branch) were significant for all the earliness traits studied. Estimates of variance due to GCA and SCA and their ratio revealed predominantly non-additive gene effects for date of first square, date of first flowers and harvested rate of first picking. Among the lines, Ersan 92 and Maras 92 and among the testers Acala Royal was found to be the best general combiners for most of the earliness characters. Four out of twelve crosses namely Ersan 92 x Chirpan 603, Ersan 92 x Acala Maxa, Maras 92 x Acala Royal and Nazilli 87 x Acala Royal were found to be the best crosses for investigated earliness characters.

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Measurement of Earliness in Upland Cotton

Cited by 8 publications

References 2 publications

Multiple applications of mepiquat chloride enhanced development of plant‐wide fruits from square initiation to boll opening in cotton

Multiple applications of mepiquat chloride enhanced development of plant‐wide fruits from square initiation to boll opening in cotton

Management practices to control premature senescence in Bt cotton

Combining ability and heterosis for earliness characters in line×tester population of Gossypium hirsutum L.

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