Genetic variability and trait association in maize (Zea mays L.) varieties for growth and yield traits

被引:34
作者
Magar, Bigul Thapa [1 ]
Acharya, Subash [1 ]
Gyawali, Bibek [1 ]
Timilsena, Kiran [2 ]
Upadhayaya, Jharana [3 ]
Shrestha, Jiban [4 ]
机构
[1] TU, IAAS, Prithu Tech Coll, Lamahi, Dang, Nepal
[2] TU, IAAS, Dept Plant Breeding, Kathmandu, Nepal
[3] Nepal Agr Res Council, Natl Maize Res Programme, Rampur, Chitwan, Nepal
[4] Nepal Agr Res Council, Natl Plant Breeding & Genet Res Ctr, Khumaltar, Lalitpur, Nepal
关键词
Maize; PCV; GCV; Heritability; Genetic advance; Correlation; GRAIN-YIELD;
D O I
10.1016/j.heliyon.2021.e07939
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The present study was carried out to study the variation, broad-sense heritability, genetic advance, correlation among traits for growth, yield, and its attributing traits in maize genotypes. Ten maize genotypes were evaluated in a randomized complete block design (RCBD) with three replications from June 2019 to September 2019. The results indicated that the genotypes were significantly different for all traits. For all traits, the phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variation (GCV). The grain yield showed the highest PCV (26.91%) and GCV (25.9%) whereas leaf width at maturity showed the lowest PCV (4.07%) and GCV(6.05%). Genetic Advance over Mean (GAM) for the traits ranged from the lowest value (0.1%) for days to 50%anthesis to the highest value (51.36%) for grain yield. Higher values of heritability and GAM % were obtained for grain yield (0.93, 51.36%) and 1000 grain weight (0.99, 36.95%) whereas the lowest values of heritability andGAM% were found for leaf length (0.5, 7.25%) and leaf width (0.39, 5.25%). Grain yield showed positive and significant phenotypic correlation with test weight (r = 0.706), cob length (r = 0.671), cob diameter (r = 0.573)and number of rows per cob (r = 0.539), respectively. Therefore, traits having high variation can be used as selection indices for indirect selection for the improvement of maize productivity.
引用
收藏
页数:5
相关论文
共 39 条
[1]  
Alake C.O., 2008, ASSET INT J, V8, P27
[2]  
Alvi M.B., 2013, PAKISTAN J BIOL SCI, V6, P136
[3]  
[Anonymous], 1967, STAT METHODS AGR WOR
[4]  
Bartaula S., 2019, Res Agric Livest Fish, V6, P163, DOI [10.3329/ralf.v6i2.42962, DOI 10.3329/RALF.V6I2.42962]
[5]  
Bello O. B., 2012, International Journal of Plant Research, V2, P138, DOI 10.5923/j.plant.20120205.01
[6]   GENETIC AND PHENOTYPIC RELATIONSHIP BETWEEN GRAIN YIELD AND COMPONENTS OF GRAIN YIELD OF MAIZE (Zea mays L.) [J].
Bocanski, Jail ;
Sreckov, Zorana ;
Nastasic, Aleksandra .
GENETIKA-BELGRADE, 2009, 41 (02) :145-154
[7]  
Burton G.W., 1952, Proc. 6th Inter. Grassland Congr, V1, P277
[8]   COMPARISON OF S1 WITH TESTCROSS EVALUATION FOR RECURRENT SELECTION IN MAIZE [J].
CARANGAL, VR ;
ALI, SM ;
KOBLE, AF ;
RINKE, EH ;
SENTZ, JC .
CROP SCIENCE, 1971, 11 (05) :658-&
[9]   CHANGES IN PHYSIOLOGICAL TRAITS ASSOCIATED WITH GRAIN-YIELD IMPROVEMENT IN 3 MAIZE BREEDING PROGRAMS [J].
CROSBIE, TM ;
MOCK, JJ .
CROP SCIENCE, 1981, 21 (02) :255-259
[10]  
Falconer DS., 1996, INTRO QUANTITATIVE G, P464