Assessment of genetics for turcicum leaf blight resistance in maize (Zea mays L.)

2021 ◽  
Vol 50 (1) ◽  
pp. 195-198
Author(s):  
Dan Singh Jakhar ◽  
Rajesh Singh ◽  
Shravan Kumar Singh
Keyword(s):  
Zea Mays L ◽  
Duplicate Gene ◽  
Gene Interaction ◽  
Leaf Blight ◽  
Gene Interactions ◽  
Exserohilum Turcicum ◽  
Dominance Model ◽  
Gene Effects ◽  
The Cross ◽  
Mode Of Inheritance

Genetics of Turcicum leaf blight (TLB) was to explore the mode of inheritance in maize caused by Exserohilum turcicum is a serious foliar disease. The genetics was estimated with the help of two crosses (CM 212 × V 336 and CM 212 × CM 145) from data of six generations (P1, P2, F1, F2, B1 and B2). The scaling tests as well as joint scaling tests revealed that the inadequacy of simple additive-dominance model and justifying the use of six parameter model for the detection of gene interactions in both the crosses for resistance to Turcicum leaf blight. All the scaling tests (A, B, C and D) were significant for the cross CM 212 × CM 145 and for the cross CM 212 × V 336 only A and C tests were significant. Based on the signs of [h] and [l] gene effects, complementary gene interaction for cross CM 212 × V 336 and duplicate gene interaction for cross CM 212 × CM 145 were evident in the inheritance of Turcicum leaf blight.

GENE EFFECTS IN CORN (ZEA MAYS L.): III. RELATIVE STABILITY OF THE GENE EFFECTS IN DIFFERENT ENVIRONMENTS

1962 ◽  
Vol 42 (4) ◽  
pp. 628-634 ◽  
Author(s):  
Edwin E. Gamble
Keyword(s):  
Zea Mays ◽  
Relative Stability ◽  
Seed Weight ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Minor Importance ◽  
Gene Effects ◽  
Population Means ◽  
Additive Gene ◽  
The Cross

Six inbred lines of corn and their F1’s, F2’s, and backcrosses were tested at two locations in each of 2 years. The population means obtained were used to estimate additive, dominance, additive × additive, additive × dominance, and dominance × dominance gene effects for six quantitative attributes.Variance components of cross × environment interactions indicated the presence of major interactions of gene effects with environments. The cross × year interactions were of major importance but the cross × location interactions were of minor importance. Additive gene effects appeared to be the most constant over environments followed by additive × dominance gene effects. The remaining types of gene effects indicated very little stability over environments for most of the attributes studied. Estimates of gene effects were most constant over environments for ear diameter in corn while yield, plant height, and seed weight showed little or no stability of the estimates of the gene effects.

Genetic analysis of various quantitative traits ininter-varietal crosses of Vigna mungo

2016 ◽  
Author(s):  
Shayla Bindra ◽  
R. K. Mittal ◽  
V. K. Sood ◽  
H. K. Chaudhary
Keyword(s):  
Yield Components ◽  
Quantitative Traits ◽  
Gene Action ◽  
Duplicate Gene ◽  
Vigna Mungo ◽  
Dominance Model ◽  
Early Generation ◽  
Gene Effects ◽  
Complementary Gene ◽  
Complementary Gene Action

Gene effects for 13 characters in four crosses of Vigna mungo were studied by six parameter generation mean model to determine the potential for the improvement of yield components. Scaling tests revealed inadequacy of the additive-dominance model for all the traits indicating the presence of non-allelic interactions. Duplicate gene action was observed for six characters in KUG-216 x HPBU-111, five in KUG-216 x Palampur-93, two in IPU-05-13 x Palampur-93 and one in IPU-05-13 x HPBU-111 and complementary gene action for one character each in KUG-216 x Palampur-93 and IPU-05-13 x HPBU-111 cross. Selection in later generations for duplicate gene action and early generation selection involving intermatings in F2 f or complementary gene action should be adopted for harnessing desirable recombinants.

CO468, CO469, CO470, CO471, CO472, and CO473 corn inbred lines with improved northern corn leaf blight resistance

2019 ◽  
Vol 99 (6) ◽  
pp. 972-984
Author(s):  
L.M. Reid ◽  
X. Zhu ◽  
K.K. Jindal ◽  
T. Woldemariam ◽  
J. Wu ◽  
...  
Keyword(s):  
Zea Mays L ◽  
Resistance Breeding ◽  
Inbred Lines ◽  
Leaf Blight ◽  
Exserohilum Turcicum ◽  
Northern Corn Leaf Blight ◽  
Helminthosporium Turcicum ◽  
Corn Inbred ◽  
Corn Leaf Blight ◽  
Very High

CO468, CO469, CO470, CO471, CO472 and CO473 are the first corn (Zea mays L.) inbred lines released from the northern corn leaf blight [Exserohilum turcicum (Pass.) K.J. Leonard & E.G. Suggs; syn. = Helminthosporium turcicum Pass.] resistance breeding program of Agriculture and Agri-Food Canada. All six inbreds possess intermediate to very high levels of resistance, which is expressed in hybrids when these inbreds are combined with susceptible test lines. Expression is even higher when some of these lines are combined with each other. Acceptable grain yields and moistures are also achieved in several hybrid testcrosses. All six inbreds also possess intermediate to high levels of resistance to eyespot, common rust, Goss’s bacterial wilt, and grey leaf spot.

scholarly journals Genetics of resistance to Fusarium stalk rot caused by Fusarium verticilloides in maize (Zea mays L.)

2020 ◽  
Vol 80 (04) ◽  
Author(s):  
B. M. Showkath Babu ◽  
H. C. Lohithaswa ◽  
A. Mohan Rao ◽  
N. Mallikarjuna
Keyword(s):  
Genetic Variance ◽  
Recurrent Selection ◽  
Additive Genetic Variance ◽  
Duplicate Gene ◽  
Genetic Effects ◽  
Reciprocal Recurrent Selection ◽  
Genetics Of Resistance ◽  
Dominance Model ◽  
Gene Effects ◽  
Stalk Rot

Fusarium stalk rot disease (FSR), incited by Fusarium verticilloides, is becoming an important biotic production constraint in many major maize growing areas causing substantial yield losses. The present investigation was conducted to understand the genetics of resistance to FSR through six generation means and variances, as a first step in addressing the problem. Five crosses were developed by crossing four FSR susceptible inbreds (VL1043, VL108867, VL121096 and VL1218) with two resistant inbreds (CM202 and CM212). Six generations of the five crosses (VL1043 × CM212, VL108867 × CM202, VL121096 × CM212, VL1218 × CM202 and VL1218 × CM212) were evaluated through artificial disease inoculation during post rainy season of 2018 and summer, 2019. The scaling tests and joint scaling tests indicated the inadequacy of additive-dominance model and showed the presence of epistatic gene effects in all the five crosses for FSR resistance. The study further revealed the importance of additive, dominance and additive × additive gene effects in the expression of FSR. The magnitude and direction of the additive genetic effects [a], dominance genetic effects [d], magnitudes of additive genetic variance (2A) and dominance genetic variance (2D) varied with the genetic background of the crosses over seasons. Duplicate gene interaction was evident in the inheritance of FSR resistance. Both, additive and non-additive components were found important thus reciprocal recurrent selection would be more effective in obtaining FSR resistant maize inbred lines.

DIALLEL ANALYSIS OF LEAF NUMBER AND DURATION TO MID-SILK IN MAIZE

1977 ◽  
Vol 19 (2) ◽  
pp. 251-258 ◽  
Author(s):  
E. E. N. A. Bonaparte
Keyword(s):  
Zea Mays L ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Inbred Lines ◽  
Leaf Number ◽  
Gene Effects ◽  
Partial Dominance ◽  
Effective Factor ◽  
Additive Gene ◽  
Mode Of Inheritance

The diallel cross technique was used to study the mode of inheritance of leaf number and duration to mid-silk in six inbred lines of maize (Zea mays L.). Leaf number showed partial dominance, and the additive gene effects accounted for a high proportion of the total variation. The narrow and broad heritabilities were both high. Leaf number was controlled by at least one effective factor. Both additive and dominance components were responsible for the expression of duration to mid-silk. The narrow and broad heritabilities were both high. Duration to mid-silk was controlled by at least four effective factors.

scholarly journals Development of a new maize hybrid for the Ecuadorian lowland

2018 ◽  
Vol 36 (2) ◽  
pp. 174-179
Author(s):  
Ricardo Limongi-Andrade ◽  
Daniel Alarcón-Cobeña ◽  
Eddie Zambrano-Zambrano ◽  
Marlon Caicedo ◽  
Paúl Villavicencio-Linzan ◽  
...  
Keyword(s):  
Zea Mays L ◽  
Regression Coefficient ◽  
Yield Potential ◽  
Curvularia Lunata ◽  
Exserohilum Turcicum ◽  
Maize Production ◽  
Maize Hybrid ◽  
Puccinia Sorghi ◽  
Feed Production ◽  
Self Sufficiency

Yellow maize (Zea mays L. var. indurata) is mainly produced in the Ecuadorian lowlands (less than 1,200 m a.s.l.), primarily for feed production. Although Ecuador has recently increased maize production, new genotypes are needed for self-sufficiency and in order to avoid costly imports. Maize is sown mostly from December to January during the rainy season. However, the irregularity of rainfall has become a constraint on production. “INIAP H-603 Superior” is a new single-cross maize hybrid developed for the Ecuadorian lowlands with improved yields, which could contribute to domestic food security. The new hybrid had an average yield of 8.48 t ha-1 with outstanding performance under the rainfall, sustained moisture, and irrigation conditions, outperforming the commercial hybrids INIAP H-602, DEKALB-7088 and INIAP H-553. Additionally, the new hybrid showed tolerance to the principal foliar diseases: leaf blight (Exserohilum turcicum), rust (Puccinia sorghi), and leaf spot (Curvularia lunata), as well as good adaptability and stability, with a regression coefficient (bi) of 0.98 when it was evaluated in 29 locations from 2010 to 2013. The greatest yield potential of the new hybrid (10.82 t ha-1) was obtained with irrigation during the dry season.

Sign in / Sign up

Export Citation Format

Share Document