Premium
Relationship between SSR‐based Genetic Distance and Cotton F 2 Hybrid Performance for Lint Yield and Fiber Properties
Author(s) -
Zeng Linghe,
Meredith William R.
Publication year - 2011
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2010.09.0536
Subject(s) - germplasm , heterosis , biology , hybrid , upgma , lint , gossypium , genetic distance , malvaceae , horticulture , microbiology and biotechnology , agronomy , genetic variation , genetics , gene
Analysis of relationships between genetic distance and hybrid performance may promote utilization of exotic germplasm in hybrid production. This study was designed to determine the relationship between SSR‐based genetic distance (GD) and F 2 hybrid performance in cotton ( Gossypium hirsutum L.). Forty‐eight F 2 hybrids derived from crosses between four elite germplasm (EL) lines and 12 exotic germplasm lines, that is, six Species Polycross (SP) germplasm lines and six John Cotton (JC) germplasm lines, were evaluated in four environments during 2008 and 2009. One hundred and fourteen primer pairs amplified 284 polymorphic fragments among the 16 parental lines. Parents divided into three groups in a dendrogram of UPGMA clusters based on pair‐wise GD among parents. The correlations between the GD and F 2 performance were significant for some fiber properties, but low with the highest r value in fineness ( r = –0.43). The highest correlation between GD and mid‐parent heterosis was −0.43 for short fiber content. Population differentiation ( P < 0.001) was identified between the JC and EL germplasm, but not between the SP and EL germplasm. Moderate correlations with r values ranging from −0.42 to 0.62 were detected between GD and fiber properties in the JC‐derived F 2 hybrids. The results suggest that prediction of F 2 performance by GD may be effective when crosses are made between parents from genetically differentiated groups in cotton germplasm.