Genetic Effects and Heterosis of Yield and Yield Component Traits Based on Gossypium Barbadense Chromosome Segment Substitution Lines in Two Gossypium Hirsutum Backgrounds

Abstract

We hybridized 10 chromosome segment substitution lines (CSSLs) each from two CSSL populations and produced 50 F1 hybrids according to North Carolina Design II. We analyzed the genetic effects and heterosis of yield and yield components in the F1 hybrids and parents in four environments via the additive-dominance genetic model. Yield and yield components of the CSSLs were controlled by combined additive and dominance effects, and lint percentage was mainly controlled by additive effects, but boll weight, boll number, seedcotton yield and lint yield were mainly controlled by dominance effects. We detected significant interaction effects between genetics and the environment for all yields traits. Similar interactions were detected between two CSSL populations (Pop CCRI 36 and Pop CCRI 45). Significant positive mid-parent heterosis was detected for all yield traits in both populations, and significant positive better-parent heterosis was also detected for all yield traits except lint percentage. The differences among parents were relatively small, but significant heterosis was detected for yield and yield components. Therefore, the relationship between heterosis and genetic distance for yield traits is complicated and requires further study. These CSSLs represent useful tools for improving yield and yield components in cotton.

QTL mapping and genetic effect of chromosome segment substitution lines with excellent fiber quality from Gossypium hirsutum × Gossypium barbadense

“…CSSLs have the potential to enrich the diversity of genetic background and uncover favorable alleles related to important fiber yield and quality traits (Ali et al 2010;Wu et al 2010;Tyagi et al 2014). In addition, CSSLs are ideal materials for QTL mapping, genetic effects identifying and gene cloning (Yang et al 2015), and are more convenient to study the minor and dominant effects of genes (Wan et al 2004;He et al 2015;Li et al 2016;Qiao et al 2016). In this study, the female parent MBI7561 was selected from a CSSL constructed by G.h and G.b, which had stable and significant advantages for fiber quality compared with the recurrent parent of CCRI45, to produce BC 5 F 1 (Table 4).…”

“…After the first molecular genetics map of cotton was constructed (Reinisch et al 1994), a wide variety of populations were used to perform QTL mapping, which predominantly consists of F 2 (Brown et al 2005;Wang et al 2010;Yu et al 2013), double haploid (DH) (Lu et al 2014;Cai et al 2015), backcross (BC) (Chen et al 2012;Shang et al 2016;Wang et al 2016b), backcross inbred lines (BILs) (Pang et al 2012;Nie et al 2015;Zhang et al 2015a), recombinant inbred lines (RILs) (Zhang et al 2015c;Jamshed et al 2016;Shang et al 2016) and CSSLs (Liang et al 2010;Li et al 2016;Shi et al 2016;Zhai et al 2016). The complex genetic background in most populations makes it difficult to estimate the positions and effects of QTL.…”

“…Subsequently, a high-density genetic linkage map was constructed that contained 2292 SSR markers and covered 5115.16 cM of the cotton AD genome (Shi et al 2015), and many QTL were identified using populations with various generations (BC 4 F 1 , BC 4 F 3 , BC 4 F 3:5 and BC 4 F 4 ) (Yang et al 2009;Ge et al 2012;Ma 2014;Guo et al 2015;Lan et al 2015). The genetic effects and heterosis of yield and yield component traits were analyzed through hybridizing 10 CSSLs according to North Carolina Design II (Li et al 2016). A total of 70 QTL and their genetic effects for fiber yield-related traits and 29 QTL for fiber quality traits on 13 chromosomes were detected using CSSLs (BC 5 F 3 , BC 5 F 3:4 and BC 5 F 3:5 ) (He 2014).…”

Dissecting the genetic basis of fiber quality and yield traits in interspecific backcross populations of Gossypium hirsutum × Gossypium barbadense

“…To transfer desirable genes from G. barbadense to G. hirsutum, we developed different interspecific backcross populations and chromosome segment substitution line (CSSL) populations (Li et al 2016a(Li et al , 2017bLu et al 2017;Song et al 2017;Zhai et al 2016;Lan et al 2011;Liang et al 2010;Kong et al 2018) and constructed a high-density simple sequence repeat (SSR) genetic linkage map of the BC 1 F 1 population, which comprised 2292 loci covering 5115.16 centimorgans (cM) of the cotton genome with an average distance of 2.23 cM between markers (Shi et al 2015). This study reports the identification of QTLs related to fiber yield and fiber quality traits using a high-density map and 5 backcross populations from the same interspecific hybrid of the two cultivated tetraploid species.…”

Transcriptome Analysis Suggests That Chromosome Introgression Fragments from Sea Island Cotton (Gossypium barbadense) Increase Fiber Strength in Upland Cotton (Gossypium hirsutum)

“…The 332 CSSLs and the two parent cultivars were genotyped. We then tested fiber strength across three environments: Anyang, China (2010, 2011), and Aksu, Xinjiang Uyghur Autonomous Region (2011; Supplemental Material, Figure S1; (Shi et al 2015; Ma 2013; B. Li et al 2016).…”