Location: Commodity Utilization ResearchTitle: Effects of inter-species chromosome substitution on cottonseed mineral and protein nutrition profiles
|ZHANG, HAILIN - Oklahoma State University|
Submitted to: Agronomy Journal
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/17/2020
Publication Date: N/A
Interpretive Summary: As a world crop, cotton has been cultivated for at least 3000 yr. Upland cotton is the major species grown in the USA. Pima cotton has also been cultivated with the characteristics of longer, finer, and stronger fibers. However, the lint yield and the environmental adaptation of Pima cotton are not as good as Upland cotton. Thus, researchers have been trying to incorporate superior fiber quality traits from Pima into Upland cotton for decades. Specifically, the effort has produced a random mated population, RMBUP-C4S1, with 18 Pima cotton lines introgressed into 3 Upland cotton lines. While there is limited information on the effects of novel phenotype traits or genetic modification on the cottonseed nutrients, this work evaluated and compared the mineral and protein contents of the seeds of the 21 parental and 177 progeny lines of 3 Upland cultivars with 18 Pima lines. Our data provided opportunities for researchers and breeders to select better and/or preferred seed quality and nutrient values, in addition to the assurance of lint yield and quality, f.or further breeding development
Technical Abstract: Upland cotton (Gossypium hirsutum L.) is the major species of cotton crops grown globally due to its high yield and good adaptability. Although with much less acreage, Pima cotton (Gossypium barbadense L.) is also cultivated for its superior fibers. Existing research efforts have mainly focused on fiber quality traits introgressing from Pima into Upland cotton, with few on the seed mineral and protein contents. In this research, we used a multi-parent advanced generation inter-crossing (MAGIC) population that was derived from crosses between 18 G. barbadense chromosome substitution lines and 3 Upland cotton cultivars to understand the profile of mineral and protein contents in the parental and progeny seeds. We evaluated and compared the contents of 13 nutrient parameters (i.e., six macro elements P, Ca, K, Mg, Na, S; six micro elements Fe, Zn, Cu, Mn, B, Ni; and protein) in the seeds of 21 parental cotton lines and their 177 recombinant inbred lines (RILs). The profile patterns of these parameters were not always the same in the individual cottonseed samples. The contents of Ca, K and B were different among both parental and progeny lines. In addition, the contents of Cu and Mn were also different (p = 0.05) among the 21 parents. In contrast, there were four additional parameters (Mg, Fe, Zn, and Ni) differing significantly in content among the progeny samples. These observations implied that chromosome substitution had impacts on the profile of the mineral nutrients in cottonseed. The data identifying top five cotton lines with the highest and lowest contents of each element and protein provide a base for researchers and breeders to select better and/or preferred seed quality, in addition to the assurance of lint yield and quality, for further development.