Yield elements, coefficient of variation and productivity of sweet corn hybrids
Lyuba Glogova
Maize Research Institute, 5835, Knezha, Bulgaria
Резюме
The study has been conducted in 2016 – 2017 on the experimental field of the
Maize Research Institute – Knezha. Sweet corn was growing in a variety experiment
at a density of 5000 p/da in three repetitions. Twelve experimental crosses of
sweet corn were studied. Variable coefficients and average biometric values were
calculated: - length of cob; thickness of the cob at the base and tip; number of rows
per cob and number of grains in one row. The number of standard cobs from each
variant has been measured and their number is established. As a result of the research
it was found that coefficients of variation in the length of the cob is changed
in the range from CV = 3% to CV = 14%. For the thickness of the base cob it varies
from CV = 2% to CV = 8%, and the top of the cob from CV = 5% to CV = 14%.
The number of rows varied from CV = 2% to CV = 13%. For the number of grains
in a row this indicator changes from CV = 2% to CV = 14%. The measured average
values of the biometric indices are respectively: - length of 18 to 23 cm, base cob
thickness from 28 to34 mm. The number of rows ranges from 12 to 16 and that of
grains in a row from 35 to 43. The highest yield of standard cobs of 1365 kg/da is received from a cross hybrid, VN10 x VN18, and the smallest 1091 kg/da of Su/03
x Delight 3. With the highest number of standard cobs 7200 p/da is a combination
of VZ/05 x Su1L, and the smallest 6500 p/da, respectively LN/03 x Delight 3.
Key words: Biometric indexes, Coefficients of variation, Hybrids, Number cobs,
Sugar corn, Yield cobs
