DIALLEL ANALYSIS OF SPAD, YIELD COMPONENT AND NITROGEN USE EFFICIENCY OF SOME BREAD WHEAT GENOTYPES UNDER LOW AND HIGH NITROGEN LEVELS
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Dosyalar
Tarih
2020
Yazarlar
Dergi Başlığı
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Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Wheat is an extremely essential food crop. It
offers a huge wealth of material for genetic analyses
due to its broad ecological distribution. Due to ex traordinary production cost and restrain the pollution
to the environment, it is imperative to decrease the
amount of nitrogen (N) fertilizer used on wheat
crops. Therefore, a full diallel cross mating design
among 4 bread wheat was determined under low
(Nt0, no N fertilizer) and high (Nt15, 150 kg N ha−1
)
N levels for SPAD, some quality and nitrogen use
efficiency characters to assess general combining
ability (GCA) and specific combining ability (SCA)
effects and their interactions with nitrogen levels.
The analysis of variance was significant for all the
characters which showed a significant variability be tween the two nitrogen levels, except for the starch
content. GCA was highly significant effects for
SPAD at heading growth stage, SPAD at the anthesis
growth stage, thousand kernel weight (TWK) and
starch content. While SCA effects were highly sig nificant for grain yield, grain nitrogen yield (GNY),
grain nitrogen yield nitrogen use efficiency
(gnyNUE) and grain yield nitrogen use efficiency
(gyNUE). The GCA / SCA ratio was less than one
for grain yield, GNY, gnyNUE and gyNUE. These
findings indicate that the non-additive genetic ef fects were more significant than additive gene action
and played a key role in these traits. Cultivar
84CZT04 had the best GCA effects for TWK, pro tein content, grain yield, GNY, gnyNUE and gyNUE
at low and high N levels.
Açıklama
Anahtar Kelimeler
Combining ability, grain N yield, protein content, recipro cal effect, grain yield
Kaynak
Fresenius Environmental Bulletin
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
29
Sayı
8
