Molecular Marker Diversity and Field Performance in Commercial Cotton Cultivars Evaluated in the Southwestern USA

• DOI: 10.2135/cropsci2004.0581
• Publication Date: 2005-06-25T00:44:22Z
• Authors: Jinfa Zhang; Y. Lu; R. G. Cantrell; E. Hughs
• Keywords: Germ plasm; Fiber crop; Gossypium; Genetic divergence; Genetic similarity

Genetic diversity in modern upland cotton cultivars ( Gossypium hirsutum L.) is thought to be narrow, thus limiting genetic advance. Robust information on the relatedness among currently grown lacking. The objectives of present study were field test a sample elite commercial cultivars, including many transgenic representing major cottonseed companies, and evaluate their divergence using simple sequence repeat (SSR) markers. Eighty‐eight SSR primer pairs chosen for genotyping that provided 177 SSRs. Jaccard's similarity coefficients 24 genotypes ranged from 0.694 0.936, with an average 0.772, indicating sufficient does exist within our cotton. similarities same seed companies generally higher than mean all grouped into six groups: two Deltapine (DP), one Stoneville (ST), FiberMax (FM), New Mexico (NM) Acalas. One California Acala cultivar origin, developed by Phytogen (PHY), did not group germplasm. Texas High Plains stripper type distant picker types formed independent groups. Under growing conditions, DP ST yielded but produced lower fiber quality, while NM had yield quality. PHY FM intermediate Six markers identified significantly correlated or quality tested, providing impetus validate marker–trait associations.