Using yield quantitative trait locus targeted SSR markers to study the relationship between genetic distance and yield heterosis in upland cotton (Gossypium hirsutum)

Abstract

The objective of this study was to examine the relationship between heterosis and genetic distance in upland cotton (Gossypium hirsutum L.). Heterosis in the different environments was evaluated and the relationship between heterosis and genetic distance (GD) was determined based on SSR markers for yield quantitative trait loci (QTL). Yields of seed cotton and lint showed a linear relationship with mid‐parent heterosis (MPH) and better‐parent heterosis (BPH). The variation in heterosis for other traits and their correlation with GD may be due to environmental factors or the effort of QTLs tested in the present study may vary in different environments. The present findings provide a foundation for heterotic grouping of parental lines and breeding of new cotton hybrids with improved seed cotton yield. This study calls for more research with stable QTLs as well as advance molecular marker techniques may be used in predicting yield heterosis in a more precise and reliable manner.

Comparative transcriptome analysis of inbred lines and contrasting hybrids reveals overdominance mediate early biomass vigor in hybrid cotton

“…After two-year field experimentation at three locations, the level of heterosis for boll number per plant, boll weight, lint percentage, lint yield, and seed cotton yield were investigated in hybrids and parents. Results can be seen in our previous study [67]. According to results of the field test, when one maternal inbred line named SJ48 (denoted as A) crossed with three paternal inbred lines viz.…”

Adaptability and Stability Comparisons of Inbred and Hybrid Cotton in Yield and Fiber Quality Traits

“…The Wuwei environments (5, 6) showed higher performance than the grand mean. The opposite was true for the Anyang (1,2) and Alar (3,4) environments. Notably, the difference in the recommended planting density was a factor in the large differences between locations (Supplementary Materials, Figure S1a).…”

“…To determine whether hybrids perform better than inbred cotton in different environments, the current study considered 30 intraspecific F 1 hybrids and 11 inbred lines. The inbred lines had diverse genetic backgrounds and performed well in the three main cotton belts of China [1]. Table 1 provides a list of all genotypes.…”

“…Cotton is a prime fiber crop and plays an important role in improving the economy of a country through industrial drive. Globally, cotton crops are cultivated in more than 80 countries and China is one of the leading cotton producing and consuming countries [1]. Thus, cotton is a substantial source of Chinese income.…”

Comparative transcriptome analysis between inbred and hybrids reveals molecular insights into yield heterosis of upland cotton

“…Many researchers tried to explain crop heterosis with the so-called gene action hypothesis of dominance [23][24][25], overdominance [9,26,27], and epistasis [28,29]. However, genetic diversity between two parents and level of heterosis is not simple and straightforward in cotton [30]. QTL mapping is advanced in 1990, makes some opportunities to understand individual QTLs, and interaction between them for heterosis.…”