Although the values of biological weight, days to maturity, spike length, number of spikelet
per spike, and grain weight per spike did not significantly change between the applications, they were generally higher in rhizobacteria applications (T2, T3, and T4) compared to the control (T1) application (Table 3).These results indicated that rhizobacteria has positive effects on examined traits.
(2017) also did not notice response to the doses of this regulator for the total amount of spikelets
nor for the quantity of filled and unfilled grains per panicle.
(2010) concluded that the number of panicles, grains per panicle, weight of a thousand grains, sterility of spikelets
and grain production were negatively altered with increasing salinity at all stages of crop development.
The estimates of direct and indirect effects of explanatory variables on the main response variable yield (Table 3) showed that the variables number of fertile spikelets
, panicle mass, number of panicles per square meter and mass of one thousand grains obtained high positive magnitudes and a pronounced direct effect on yield; therefore, the existing phenotypic correlation explains much of the true association.
were counted from randomly selected mother shoot spikes manually.
After harvest, spikelet
per main spike (SMS, the 10 main panicle average the value), grain number per spike (GrNo/S, the average value of the random 10 ears), sterile spikelet
number (SSNo, the average value of the random 10 ears), thousand grain weight (TGW, 1000 grain weight), harvest index (HI) and grain yield per plot (GY/P) were investigated.
NP, number of panicles per plant; NGP, number of grains per panicle; NSP, number of spikelets
per panicle; SF, spikelet
fertility; TGW, 1000-grain weight; GY, grain yield per plant; RIL, recombinant inbred line; TC, testcross [F.sub.1]; [H.sub.MP], mid-parent heterosis.
In some species the number of branches and their branching degree are reduced, appearing simple anthelodium, spike of spikelets
and fascicle of spikelets
Pollen grain fertility was recorded after anthers were collected from spikelets
two days before anthesis and later anthers were fixed in acetic acid-alcohol (1:3) solution (Sarial and Singh, 2000).
One of the main reasons for yield drawback in aerobic rice is smaller sink size [1,3]; sink size (spikelets/[m.sup.2]) contributes more to the yield gap between aerobic and flooded rice than grain filling percentage and 1000-grain weight as flooded rice produces more panicles with more spikelets
per panicle than aerobic rice .