Genetic variability predicting breeding potential of upland cotton (Gossypium hirsutum L.) for high temperature tolerance

Table 7 Calculation of specific combining ability (SCA) and heterosis (Better-parent) in different promising crosses for each trait under high temperature stress condition

Traits	Crosses	SCA	Crosses	Heterosis (Better-parent)
RCI	FH-466 × CIM-602	-17.10	NIAB-545 × FH-326	-46.74
RCI	NIAB-878 × CIM-602	-9.36	FH-Lalazar × Silky-3	-46.34
CC	NIAB-545 × FH-442	7.33	-	-
CC	NIAB-878 × SLH-12	6.25	-	-
CT	FH-466 × FH-442	-2.18	NIAB-878 × Silky-3	-14.39
CT	FH-Lalazar × FH-326	-2.14	FH-Lalazar × FH-326	-12.61
BR	FH-Noor × FH-442	12.95	FH-Lalazar × FH-326	11.25
BR	FH-458 × CIM-602	6.20	FH-Lalazar × Silky-3	7.59
B/P	Weal-AG-Shakar × SLH-12	17.71	FH-Lalazar × Silky-3	55.56
B/P	NIAB-878 × Silky-3	13.43	FH-Lalazar × FH-326	50.00
BW	NIAB-878 × FH-326	0.46	NIAB-878 × FH-326	12.75
BW	FH-466 × FH-442	0.36	NIAB-545 × FH-326	9.91
SI	FH-Noor × SLH-12	0.78	NIAB-545 × FH-326	8.17
SI	FH-458 × FH-442	0.72	NIAB-878 × FH-326	7.14
SB	Weal-AG-Shakar × SLH-12	8.07	Weal-AG-Shahakar × SLH-12	40.68
SB	NIAB-878 × Silky-3	5.88	FH-Noor × FH-326	14.81
PH	Weal-AG-Shahkar × SLH-12	32.44	FH-458 × Silky-3	9.55
PH	FH-Noor × CIM-602	30.11	-	-
SCY	Weal-AG-Shahkar × SLH-12	21.90	NIAB-878 × Silky-3	31.90
SCY	NIAB-878 × Silky-3	18.87	NIAB-878 × FH-326	8.44

Note: RCI Relative cell injury, CC Chlorophyll contents, CT Canopy temperature, BR Boll retention, B/P Bolls per plant, BW Boll weight, SB Sympodial branches per plant, SI Seed index, PH Plant height, SCY Seed cotton yield/plant

ISSN: 2523-3254