Yield elements, coefficient of variation and productivity of popcorn hybrids
Lyuba Glogova
Maize Research Institute, 5835, Knezha, Bulgaria
Резюме
The experimental work has been done out experimental field of the Maize Research
Institute – Knezha in 2016 – 2017. The plants has been grown at a density
of 5000 p/da in three repetitions in a competitive variety experience. The subject
of study has been 16 experimental hybrids of popcorn maize. Five specimens has
been taken from each variation. The aim of the study is to establish the coefficients
of variation of the yield elements and to evaluate the productivity of hybrids of
popcorn maize. The coefficient of variation for each experimental combination and
the mean values of the studied elements of the yield has been calculated: - length of
the cob, tchickness of the base and tip cob, number of rows in one cob, and number
of grains in one row. Grain yields and popcorn volume of the hybrids are under
investigation. It has been found that coefficients of variation for the length of the
cob are in the range of CV = 3% to CV = 13%. For the tchickness of the base cob
the variation is from CV = 2% to CV = 8%. For the tchickness of the cob tip the
dynamics of variation is from CV = 2% to CV = 10%. The coefficient of variation
of the number of rows is between CV = 6% and CV = 15% and the number of grains is from CV = 3% to CV = 16%. From measuriments of the yield elements it was
found that the length of the cob of the studied variants is in the range of 18 to 23
cm. The tchickness at the base of the cob ranges from 33 mm to 38 mm and the top
at 24 to 29 mm. The number of rows ranges from 14 to 18 and the grains from 37 to
46. The grain yield varies from 415 kg/da for KP7/6 x 2LVN to 589 kg/da for KP1
x KP1/20. The popcorn volume is 1800 cm2 at the combination KP367/101 x KP20
and the smallest 1240 cm2 for KP1/20 x Rosa04.