Evaluation of progenies from the fifth reciprocal recurrent selection cycle in maize

Alves, Natália Botega; Pádua, José Maria Villela; Dias, Kaio O. G.; Diniz, Rafael Parreira; Guedes, Marcio Lisboa; Cardoso, Gustavo Andrade; Souza, João Cândido de

doi:10.4238/2015.july.27.11

Cited by 2 publications

(2 citation statements)

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“…The expected selection gain, based on a selection intensity of 10%, was 14.07%, similar to the value reported by Alves et al (2015) (16%), indicating that reciprocal recurrent selection was effective. Thus, high values of heritability result in high gains due to selection reliability.…”

Section: Resultssupporting

confidence: 84%

Number of progenies and repetitions for reciprocal full-sib recurrent selection programs in maize

et al. 2021

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For a reciprocal recurrent selection (RRS) program to succeed, it is essential to maintain genetic variability throughout the selection cycles and to obtain accurate estimates of genetic parameters, which in turn are directly related to the number of progenies and repetitions evaluated. This study evaluates the potential of maize progenies of the sixth cycle of RRS and proposes, using simulation methods, the ideal combination of the number of progenies and repetitions to employ in reciprocal full-sib recurrent selection. A total of 163 full-sib progenies were evaluated in a randomized block design with six repetitions. Based on the yield data, analysis of variance was carried out, and different scenarios were simulated using the Monte Carlo chain method. These scenarios varied in the number of repetitions (two, four, and six) and progenies (30 to 163). The contrast between progenies and controls was significant, revealing the potential of the progenies of the sixth cycle of RRS. The high magnitude of the selective accuracy (0.77) was reflected in high estimates of heritability, which allowed for efficient phenotypic selection, obtaining selection gains of 14.07%. From the estimates of phenotypic and genotypic variance, heritability, accuracy, and standard error, it was found that a repetition number above two results in drastic changes in the estimates of these parameters; however, with the use of 130 progenies, these estimates tend to stabilize, implying that a high number of progenies does not interfere decisively in the quality of most parameters, except for the limits of maximum and minimum variation.

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Section: Resultssupporting

confidence: 84%

Number of progenies and repetitions for reciprocal full-sib recurrent selection programs in maize

et al. 2021

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“…Data concerning ears plant -1 expressed highly significant differences among the half sib recurrent families of maize population CZP-132011. The current findings are in line with Noor et al (2010) who also noted significant (P<0.01) differences among half sib recently families of maize Varity Pahari for plant and ear height, while Alves et al (2015) reported significant differences in fifth recurrent cycle in maize progenies for ears plant -1 . After one cycle of recurrent selection the gain cycle -1 for ears plant -1 was 3.26%.…”

Section: Ears Plant -1supporting

confidence: 92%

Evidence of Improving Yield and Yield Attributes Via Half-sib Family Recurrent Selection in Maize (Zea mays L.)

Sohail¹,

Hussain²,

Ali³

et al. 2018

Int. J. Curr. Res. Biosci. Plant Biol.

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Recurrent selection is a cyclical selection procedure for improving the mean performance of plant populations. The goal of current research was to determine genetic variability, heritability, selection differential, expected response, percent gain cycle -1 and genotypic and phenotypic correlations among various traits. Sixty four half sib recurrently selected families derived from CIMMYT maize population CZP-132011 were evaluated in 8×8 square lattice design with two replications at Cereal Crops Research Institute (CCRI), Pirsabak during 2017. Data were noted on ear plant -1 , ear length, ear diameter, grain rows ear -1 , grains row -1 , 1000 grain weight and grain yield. Results showed highly significant differences among half sib families for all the studied traits. High heritability (h 2 ˃ 0.60) was recorded for all traits except 1000 grain weight which exhibited moderate heritability. High index of variation (I.V ˃ 1.00) was observed for all traits. Based on heritability and selection differential, the expected response was negative for plant height (-2.81 cm) and ear height (-5.22 cm), while positive expected response was recorded for ears plant -1 (0.15), ear length (1.48 cm), ear diameter (0.30 cm), grain rows ear -1 (1.30), grains row -1 (2.94), 1000 grain weight (14.19 g) and grain yield (153.04 kg ha -1 ). After one cycle of recurrent selection in these half sib families, the gain cycle -1 was recorded negative for plant height (-2.34%), ear and height (-4.90%),while positive gain cycle -1 was observed for ears plant -1 (3.26%), ear length (3.06%), ear diameter (4.99%), grain rows ear -1 (2.57%), grains row -1 (7.84%), 1000 grain weight (5.87%) and grain yield (4.17%).Grain yield exhibited significant and positive correlation with ear length (rG = 0.50** and rP = 0.33*) both at genotypic and phenotypic levels. Based on the findings of current experiment, it could be concluded that improvement in half sib families through recurrent selection method was found effective and population CZP-132011 has the potential of improvement through further recurrent selection. K e y w o r d sExpected response Half sib families Heritability Recurrent selection Zea mays L.

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Evaluation of progenies from the fifth reciprocal recurrent selection cycle in maize

Cited by 2 publications

References 10 publications

Number of progenies and repetitions for reciprocal full-sib recurrent selection programs in maize

Number of progenies and repetitions for reciprocal full-sib recurrent selection programs in maize

Evidence of Improving Yield and Yield Attributes Via Half-sib Family Recurrent Selection in Maize (Zea mays L.)

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