TITLE:
Cottonseed Protein, Oil, and Mineral Nutrition in Near-Isogenic Gossypium hirsutum Cotton Lines Expressing Leaf Color Phenotypes under Field Conditions
AUTHORS:
Nacer Bellaloui, Rickie B. Turley, Salliana R. Stetina, William T. Molin
KEYWORDS:
Isogenic Cotton, Cottonseed, Seed Protein, Seed Oil, Seed Composition
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.10 No.7,
July
30,
2019
ABSTRACT: Information about the effects of phenotype traits on cottonseed protein,
oil, and nutrients is scarce. The objective of this research was to investigate
the effects of leaf color trait on seed nutrition in near-isogenic Gossypium
hirsutum cotton expressing green (G) and yellow (Y) leaf color phenotypes. Our
hypothesis was that leaf color can influence the accumulation of nutrients in
seeds. Sets of isogenic lines were: DES 119 (G) and DES 119 (Y); DP 5690 (G)
and DP 5690 (Y); MD 51ne (G) and MD 51ne (Y); SG 747 (G) and SG 747 (Y). Each
NIL set is 98.44 % identical. Parent line SA 30 (P) was used as the control.
The experiment was repeated for two years (2014 and 2015). The results showed
that, in 2014, seed oil in DES 119 (G) and SG 747 (G) were significantly higher
than their equivalent yellow lines. Green lines showed higher content of
phosphorus compared with yellow lines. Higher levels of Cu, Fe, Mn, Ni, and Zn
were recorded in DES 119 (G) and MD 51ne (G). In 2015, seed protein, oil, C, N, P, B, Cu, and Fe were higher in
green lines than in yellow lines. There was a significant correlation between
protein and nutrients, and between oil and nutrients in 2015, but not in 2014
as the temperature was warmer in 2015 than in 2014. This research demonstrated
that leaf color can alter seed composition and mineral nutrition under certain
environmental growing conditions such as temperature.