| dc.description.abstract | An experiment was conducted at the Research Farm of the Department of Genetics and
Plant Breeding of Hajee Mohammad Danesh Science and Technology University,
Dinajpur, Bangladesh during 2016-2017 to develop biometrical method based on some
morphological traits for characterization of the selected wheat variety. Nine wheat
varieties were used in the experiment and they were collected from Wheat Research
Institute, Dinajpur. The experimental result demonstrated a wide variation among the
nine cultivars in many morphological characters like 50% germination days, 50%
heading days, plant height, number of tiller, internodes distance, flag leaf angle, length
and breadth of flag leaf, awn length, number of spikelet per spike, maturity day, length
and breadth of grain, yield per plant, 1000 grain weight etc. BARI GOM 26 requires
comparatively less day and BARI GOM 27 requires more days for 50% heading than
other cultivars. Among the cultivars BARI GOM 28, BARI GOM 29 and BARI GOM 30
are comparatively short (< 90 cm), others are medium sized (>90 cm). In BARI GOM 27
long internodes distance was found followed by BARI GOM 24 and BARI GOM 25 and
short internodes distance was found in BARI GOM 29. Moreover, long awn exhibited in
BARI GOM 24 and short in BARI GOM 22. BARI GOM 26 is late mature cultivar but
BARI GOM 27 is early mature cultivar. BARI GOM 27 has narrow flag leaf than others.
BARI GOM 28 show short spike length while BARI GOM 22, BARI GOM 26 and
BARI GOM 30 show nearly same length of spike. The density of spikelet in the spike of
BARI GOM 24 is more but in BARI GOM 28 less spikelet present than other cultivars.
The number of grain per spike is presented in following order BARI GOM 22 >BARI
GOM 26 > BARI GOM 24 > BARI GOM 28 > BARI GOM 29 > BARI GOM 27 >
BARI GOM 25 > BARI GOM 30. Moreover, differentiation present in the grain size of
the cultivars. BARI GOM 25 is large sized in length and breadth but the grain of BARI
GOM 27 is comparatively small sized. BARI GOM 22, BARI GOM 23, BARI GOM 24,
BARI GOM 25 and BARI GOM 26 are classified which have <7.5 mm length of grain.
The 1000 grain weight of BARI GOM 24 is more than other cultivars and comparatively
less in BARI GOM 22 and BARI GOM 27. BARI GOM 24 can be identified which
height is >90cm, breath of flag leaf is > 1.2 cm, spike length is>10 cm and yield per
plant is > 20.196 g. Based on these variation, a classification and regression tree (CART)
has been developed to identify the wheat cultivar easily. | en_US |
