In parental lines, CRIS-134 formed 1st sympodial node at the lowest node of 7.50 being earlier while FH-113 formed 1st sympodia
at the highestnode of 10.15, thus it was considered as a late maturing parent.
The cultivars NIAB-999 and CIM-497 displayed positive GCA effects for sympodia
and bolls per plant revealing that sympodia
is positively correlated with bolls and seed cotton yield per plant.
per plant varied from 8.87 to 12.27 and 8.80 to 17.40 in parental cultivars and F3 populations, respectively (Fig.
At maturity ten consecutive plants were randomly selected per entry per replication per irrigation treatment and treated as index plants for recording observations on number of bolls per plant number of sympodia
per plant seedcotton yield per plant and lintcotton yield per plant.
EMS showed highly significant interaction among genotypes of a particular species for plant height, sympodias
, number of bolls/plant, seed cotton yield and lint percentage, whereas (gamma) -rays express less significant interaction for most of the traits except plant height (Table 2).
Traits measurement and statistical analyses: Data were recorded on plant height, monopodia per plant, bolls per sympodia
, boll weight, seeds per boll and seed cotton yield.
Mean squares from line x tester analysis for various characters in upland cotton Source of DF Node Earliness Earliness Plant variation number (bolls (bolls height to 1st formed at opened at sympodia
90 DAP *) 120 DAP) Replications 3 0.36 0.77 0.90 137.90 Genotypes 22 4.63 ** 61.63 ** 43.05 ** 617.30 ** Crosses 14 5.59 ** 50.07 ** 37.20 ** 590.70 ** Lines (GCA) 4 3.00 ** 70.15 ** 41.85 ** 1045.00 ** Testers (GCA) 2 10.22 ** 12.22 ** 11.48 ** 952.30 ** Lines x tester (SCA) 8 5.73 ** 49.49 ** 41.30 ** 273.20 ** Error 42 0.76 0.62 0.56 12.14 Source of No.
The direct path coefficient of fruiting sites per sympodia
to lint yield was positive and significant at 0.05 level.
The interval, in days, between the appearances of flowers at equivalent positions on successive sympodia
is referred to a VFI.
(2010) noted that among the parents, some exhibited higher GCA estimates for bolls per plant, boll weight, seed cotton yield per plant; number of sympodia
; ginning outturn and lint index; yet some were good general combiners for fiber quality traits.
Lou  determined effect of Mn fertilizer on cotton and found pat it increased growp number of sympodia
and squares and promoted boll setting and reduced shedding of fruiting forms pus increasing yield.
The main effect of tip damage is to cause production of vegetative branches (monopodia), which in turn produce fruiting branches (sympodia