Genetic variation among cotton (<i>Gossypium hirsutum</i> L.) cultivars for mote frequency

Bolek, Yuksel

doi:10.1017/s0021859606006174

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…Both excessive and reduced plant densities can lead to a reduction in cotton yield due to less fruit formation (Yao et al., 2016). Although maximum cotton yield can only be achieved at an optimal plant density (Darawsheh, Chachalis, Aivalakis, & Khan, 2009; Feinerman, 1983), the high yield produced by J‐4B might be attributed to genetic variation, early maturity, and stress tolerance (Bao, Liu, & Chen, 2014; Bölek & Oglakci, 2007). These data further confirmed that selection of an appropriate genotype and optimal density could play important roles in successful crop production.…”

Section: Discussionmentioning

confidence: 99%

Leaf nitrogen metabolism during reproductive phase is crucial for sustaining lint yield of densely populated cotton genotypes

et al. 2020

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Planting density and genotype choice are important agronomic techniques to achieve high crop yields. This study explored how planting density and genotypes affect cotton (Gossypium hirsutum L.) leaf N metabolism and lint yield. Treatments included three planting densities (low, 3.00 × 10 4 ; moderate, 6.00 × 10 4 ; and high, 9.00 × 10 4 plants ha −1) and two genotypes (Zhongmiang16 and J-4B). A randomized complete block design with split plot arrangement was used. Planting density of 6.00 × 10 4 ha −1 positively influenced leaf physiobiochemical attributes and boll production. The high planting density reduced lint yield by suppressing leaf soluble sugar, protein, amino acid, chlorophyll a, chlorophyll b, nitrate N and nitrite N content, nitrite reductase, and nitrate reductase activity. Moderate-density crop produced 15.9 and 10.7% more lint yield than low-and high-density planting, respectively. This high yield was the result of improved leaf level functioning (e.g., increased pigmentation and N metabolism during late reproductive growth), which increased C assimilation. Favorable leaf microclimate could also have sustained activities of leaf nitrate and nitrite reductase and increased amino acid and protein contents, with better distribution of N metabolic assimilates. Late reproductive structure development closely allied with leaf physiological attributes under a short growing season. Cotton genotypes, irrespective of their architectural variation, produced higher lint yield when grown at 6 × 10 4 ha −1 in a short cropping season. 1 INTRODUCTION Cotton (Gossypium hirsutum L.) is the leading natural fiber producing plant worldwide (Constable & Bange, 2015). China is among the top cotton-producing countries of

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Section: Discussionmentioning

confidence: 99%

Leaf nitrogen metabolism during reproductive phase is crucial for sustaining lint yield of densely populated cotton genotypes

et al. 2020

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“…By this procedure, undesirable mutations or segregates may be removed, while exploiting those affecting yield, stability and other desirable traits. For instance, mote frequencies that represent a loss in yield and cause imperfections in yarn and cloth quality (Bolek 2006), or leaf morphology that affects yield, quality, maturity, water-use efficiency, etc. (Hao et al 2008) might be improvable via intra-cultivar selection at very low density.…”

Section: Discussionmentioning

confidence: 99%

Intra-cultivar variation in cotton: response to single-plant yield selection at low density

et al. 2010

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SUM M ARYIn a 5-year study (2004)(2005)(2006)(2007)(2008), the possibility of exploiting intra-cultivar variation in cotton (Gossypium hirsutum L.) was investigated. Honeycomb single-plant selection for seedcotton yield was employed within three cultivars at a low density of 1·15 plants/m 2 . First-and second-generation progeny lines (1GPLs and 2GPLs) were evaluated for seedcotton yield at low density at three sites, whereas third-generation progeny lines (3GPLs) were tested at the crop density of 10 plants/m 2 across two sites and 2 years. Significant differentiation for seedcotton yield was discovered within cultivar (cvar) Christina and cvar Corona at both low and crop densities, and within cvar Flora at low density. In addition, significant intra-cultivar heterogeneity for fibre quality properties was found at crop density. The 1GPLs and 2GPLs grown at low density showed increases in seedcotton yield of 16 and 19%, respectively, in cvar Christina, and of 2·6 and 3·7%, respectively, in cvar Corona. In cvar Flora, the 1GPLs and 2GPLs yielded 10 and 3·3% lower than the mother cultivar, respectively. When grown at standard crop density, across sites and years, 12 and 5·2% higher yield was obtained by the Christina-derived 3GPLs and the Corona-derived 3GPLs, respectively, when compared with the original cultivars. These results provide evidence that elite cultivars are not homogeneous but rather heterogeneous material, within which selections can be made to maintain or improve uniformity and further improve desirable agronomic traits.

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“…As previously mentioned, polyamines play an important role as regulators of many physiological processes including flower induction. In addition, lint yield and quality is affected by the fruiting pattern along the cotton plant (Gokani & Thaker 2001; Bolek 2006). However, only limited information exists on the polyamine content and distribution along the cotton plant.…”

Section: Introductionmentioning

confidence: 99%

Nodal distribution of free polyamines in cotton ovaries

et al. 2011

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The nodal distribution of free polyamines (important regulators of flower induction) in cotton (Gossypium hirsutum L.) ovaries was determined by high-performance liquid chromatography (HPLC). The objective of the study was to investigate the nodal distribution of putrescine (Put), spermidine (Spd) and spermine (Sp) of cotton lines (G. hirsutum L.), and to determine whether there are differences in ovarian polyamine content among three commercial cotton cultivars. A field study was conducted in 2005 and 2006 using the cultivars FM960BR, ST5599BR and DP444BR. Free polyamines Put, Spd and Sp were determined in ovarian tissue of first-position white flowers starting at the beginning of anthesis and collected from the 7th, 9th, 11th and 13th main-stem nodes for four consecutive weeks. There was no significant nodal position by cultivar interaction; thus, the main effects were tested. Put content decreased acropetally along the main stem of the cotton plant with the highest content observed at the 7th node and the lowest at the 13th node. Spd content decreased below and above the 9th node, with the 9th node showing the highest amount of Spd and the 13th node the lowest in both years of the study. Similarly, Sp content decreased below and above the 9th node. In general, the 7th and the 9th node had the highest titre of free polyamines. Among the cultivars tested, FM960BR showed higher polyamine content in one season; however, the observation was not consistent from year to year. The highest amounts of polyamines were observed at the 7th and the 9th node of cotton and this may be associated with the known yield distribution: almost 0·80 of the total yield of cotton is derived from these nodal positions.

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Genetic variation among cotton (Gossypium hirsutum L.) cultivars for mote frequency

Cited by 5 publications

References 24 publications

Leaf nitrogen metabolism during reproductive phase is crucial for sustaining lint yield of densely populated cotton genotypes

Leaf nitrogen metabolism during reproductive phase is crucial for sustaining lint yield of densely populated cotton genotypes

Intra-cultivar variation in cotton: response to single-plant yield selection at low density

Nodal distribution of free polyamines in cotton ovaries

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