Characterization of Indigenous and Exotic Maize Hybrids for Grain Yield and Quality Traits under Heat Stress

A set of eighty one genotypes comprising sixty three newly developed single cross quality protein maize hybrids produced by 9 lines x 7 testers crosses along with sixteen parental inbred lines and two standard checks were evaluated for genetic variability, broad sense heritability and genetic advance at CCS, Haryana Agricultural University, Regional Research Station, Karnal, during kharif 2014. Highly significant values of mean sum of squares due to genotypes for all the 17characters studied could be recorded. Close correspondence between GCV and PCV was observed for all the traits except number of cobs per plant and cob diameter. The characters viz., number of grains per cob, tryptophan content, lysine content and grain yield per plant were recorded high estimates of heritability and genetic advance as per cent of mean indicating them to be controlled by additive genes.

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Response of the Gene Actions Governing Grain Yield and Quality Traits in Wheat Parents and Their F1 Progenies to Decreasing Soil-N Rate

Annual Research & Review in Biology ◽

10.9734/arrb/2015/21939 ◽

2015 ◽

Vol 8 (5) ◽

pp. 1-16

Author(s):

A. Al-Naggar ◽

R. Shabana ◽

M. El-Aleem ◽

Zainab El-Rashidy

Keyword(s):

Grain Yield ◽

Quality Traits ◽

Soil N ◽

Yield And Quality ◽

Grain Yield And Quality

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Wheat Cultivars Vary Widely in Their Responses of Grain Yield and Quality to Short Periods of Post-Anthesis Heat Stress

Functional Plant Biology ◽

10.1071/pp9940887 ◽

1994 ◽

Vol 21 (6) ◽

pp. 887 ◽

Cited By ~ 131

Author(s):

PJ Stone ◽

ME Nicolas

Keyword(s):

Heat Stress ◽

High Temperature ◽

Grain Yield ◽

Amylose Content ◽

High Temperature Treatment ◽

Wheat Cultivars ◽

Yield And Quality ◽

Apparent Amylose Content ◽

Wide Range ◽

Grain Yield And Quality

Short periods of high temperature (> 35�C) are common during the post-anthesis period in Australian wheat crops and have recently been shown to significantly reduce grain yield and quality. In view of this, 75 cultivars of wheat were screened for tolerance to 3 days of high temperature (max. 40�C). Detailed results for grain yield and quality are presented for five wheat cultivars in order to illustrate the wide range of responses to short periods of high temperature. Individual kernel mass decreased by up to 23%, depending on variety, and the gliadin : glutenin ratio altered in the range -9 to +18% in response to high temperature treatment, also depending on variety. Noodle swelling power was significantly affected by heat in two cultivars, but there was no significant change due to heat in the apparent amylose content in any variety. The marked response of several yield and quality components to a heat treatment lasting only ca 5% of the grain-filling period suggests that starch and protein synthesis do not immediately andlor fully recover from short, severe heat stress. In addition, we conclude that wheat shows considerable genetic variability in tolerance to short periods of high temperature for both grain yield and quality.

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