The Scientific World Journal

Review Article

Molecular Markers and Cotton Genetic Improvement: Current Status and Future Prospects

Table 3

An overview of QTL studies in cotton.


Traits	Descriptor	Population	Size	Marker (number and type)	QTLs number	Reference

Fiber quality	FS, FL and FF	F₂	171	RFLPs and 85 RAPDs	13	[135]
	FS	F₂	186	217 SSRs, 800 RAPDs UBC and 1040 OPERON	2	[153]
	LY, LP, SW, NS, UQ, SF, FL, FE, FT, FF and IF	F₂	120	144 AFLPs, RFLPs and 150 SSRs	28	[141]
	FS, FE, FL, FU, LP and FF	F₂	117	290 SSRs and 9 AFLPs	16	[19]
	FF	BC₃F₂	3,662	262 RFLPs	41	[185]
	FL, FLU and SFC	BC₃F₂	3,662	262 RFLPs	45	[134]
	FS, FE, FU, FL and FF	RIL’s	270	7508 SSRs, 384 SRAPs and 740 IT-ISJs	13	[186]
	FL, FS, FF and FE	F₂	—	1378 SSRs	39	[136]
	FS, FL, FF, FMT, FE and SFI	RIL’s	180	4106 SSRs, AFLPs, RAPDs and SRAPs	48	[187]
	FE, FL, FS, FF and FU	CP	172	16052 SSRs	63	[188]

Fiber and agronomical	SCY, LY, LP, BW, SI, FMT, PER, WF, WT, FF, FL, FE and FS	RIL’s	188	141 SSRs	56	[189]

Yield and fiber	FS, FL, FF, FE, LP, SI, NB, SCY and LY	RIL’s	258	2131 SSRs	53	[190]
	NB, BW, SI, LP, LI, SCY, LY, FL, FS, FF, FE and FU	4WC and inbred lines	280	6123 SSRs and EST-SSRs	31	[138]
	SCY, LY, NB, BW, LP, SI, LI and FBN	RIL’s and IF2	180	2675 EST-SSRs	111	[191]
	PH, FBN, BW, LP, LI, SI, LY, FL, FS, FE, FF and FU	G. hirsutum accessions	81	121 SSRs	180	[3]
	LI, SI, LY, SCY, NSB and FS	F₂	69	834 SSRs, 437 SRAPs, 107 RAPDs and 16 REMAPs	52	[192]

Morphological	LBNO, SL1, L1, W1, L2, W2, L3 and W3	F₂	180	261 RFLPs	62	[193]
	EM	F₂ and F₃	—	4083 SSRs	54	[140]
	NFB	F₂	251	1165 SSRs	5	[194]

Plant architectural	PH, FBL, FBN, FBA, FBL/PH and NMUB	RIL’s	180	2130 SSRs, 2 RAPDs and 1 SRAP	16	[137]

NB: number of bolls per plant, BW: boll weight, SI: seed index, LP: lint percent, LI: lint index, SI: seed index, SCY: seed cotton yield per plant, LY: lint yield per plant, FL: fiber length, FS: fiber strength, FE: fiber elongation, FU: fiber uniformity ratio, FY: fiber yellowness, FF: fiber fineness, FMT: fiber maturity, PH: plant height, FBL: fruit branch length, FBN: fruit branch number, FBA: fruit branch angle, FLU: fiber length uniformity, SFC: short fiber content, FR: fiber reflectance, SW: seed weight, NS: number of seeds per plant, UQ: upper quartile length, SF: short fiber content, FT: fiber tenacity, IF: immature fiber content, SFI: short fiber index, NSB: number of seeds per boll, EM: early maturity, NMUB: lower, middle, and upside boll number, NFB: node to first fruiting branch, LBNO: lobe numbers, SL1: sublobe number on the main lobe, L1: main-lobe length, W1: main-lobe width, L2: second-lobe length, W2: second-lobe width, L3: third-lobe length, W3: third-lobe length, PER: perimeter, WF: weight fitness, WT: wall thickness, FBL/PH: ratio of fruit branch length to plant height, RIL’s: recombinant inbred lines, IF2: immortalized F2s, 4WC: four way cross, CP: composite cross, and BC₃F₂ = backcross families.