PMID- 32785293
OWN - NLM
STAT- MEDLINE
DCOM- 20201002
LR  - 20201002
IS  - 1932-6203 (Electronic)
IS  - 1932-6203 (Linking)
VI  - 15
IP  - 8
DP  - 2020
TI  - Selection criteria for high-yielding and early-flowering bread wheat hybrids 
      under heat stress.
PG  - e0236351
LID - 10.1371/journal.pone.0236351 [doi]
LID - e0236351
AB  - Hybrid performance during wheat breeding can be improved by analyzing genetic 
      distance (GD) among wheat genotypes and determining its correlation with 
      heterosis. This study evaluated the GD between 16 wheat genotypes by using 60 
      simple sequence repeat (SSR) markers to classify them according to their 
      relationships and select those with greater genetic diversity, evaluate the 
      correlation of the SSR marker distance with heterotic performance and specific 
      combining ability (SCA) for heat stress tolerance, and identify traits that most 
      influence grain yield (GY). Eight parental genotypes with greater genetic 
      diversity and their 28 F1 hybrids generated using diallel crossing were evaluated 
      for 12 measured traits in two seasons. The GD varied from 0.235 to 0.911 across 
      the 16 genotypes. Cluster analysis based on the GD estimated using SSRs 
      classified the genotypes into three major groups and six sub-groups, almost 
      consistent with the results of principal coordinate analysis. The combined data 
      indicated that five hybrids showed 20% greater yield than mid-parent or 
      better-parent. Two hybrids (P2 x P4) and (P2 x P5), which showed the highest 
      performance of days to heading (DH), grain filling duration (GFD), and GY, and 
      had large genetic diversity among themselves (0.883 and 0.911, respectively), 
      were deemed as promising heat-tolerant hybrids. They showed the best mid-parent 
      heterosis and better-parent heterosis (BPH) for DH (-11.57 and -7.65%; -13.39 and 
      -8.36%, respectively), GFD (12.74 and 12.17%; 12.09 and 10.59%, respectively), 
      and GY (36.04 and 20.04%; 44.06 and 37.73%, respectively). Correlation between GD 
      and each of BPH and SCA effects based on SSR markers was significantly positive 
      for GFD, hundred kernel weight, number of kernels per spike, harvest index, GY, 
      and grain filling rate and was significantly negative for DH. These correlations 
      indicate that the performance of wheat hybrids with high GY and earliness could 
      be predicted by determining the GD of the parents by using SSR markers. 
      Multivariate analysis (stepwise regression and path coefficient) suggested that 
      GFD, hundred kernel weight, days to maturity, and number of kernels per spike had 
      the highest influence on GY.
FAU - Al-Ashkar, Ibrahim
AU  - Al-Ashkar I
AUID- ORCID: 0000-0001-5022-1555
AD  - Plant Production, College of Food and Agriculture Sciences, King Saud University, 
      Riyadh, Saudi Arabia.
AD  - Agronomy Department, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt.
FAU - Alotaibi, Majed
AU  - Alotaibi M
AD  - Plant Production, College of Food and Agriculture Sciences, King Saud University, 
      Riyadh, Saudi Arabia.
FAU - Refay, Yahya
AU  - Refay Y
AD  - Plant Production, College of Food and Agriculture Sciences, King Saud University, 
      Riyadh, Saudi Arabia.
FAU - Ghazy, Abdelhalim
AU  - Ghazy A
AD  - Plant Production, College of Food and Agriculture Sciences, King Saud University, 
      Riyadh, Saudi Arabia.
FAU - Zakri, Adel
AU  - Zakri A
AD  - Plant Production, College of Food and Agriculture Sciences, King Saud University, 
      Riyadh, Saudi Arabia.
FAU - Al-Doss, Abdullah
AU  - Al-Doss A
AD  - Plant Production, College of Food and Agriculture Sciences, King Saud University, 
      Riyadh, Saudi Arabia.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20200812
PL  - United States
TA  - PLoS One
JT  - PloS one
JID - 101285081
SB  - IM
MH  - Bread
MH  - Breeding
MH  - Edible Grain/genetics/growth & development
MH  - Flowers/genetics/growth & development
MH  - Genotype
MH  - Heat-Shock Response/*genetics
MH  - Humans
MH  - Hybrid Vigor/*genetics
MH  - Hybridization, Genetic/genetics
MH  - Microsatellite Repeats/genetics
MH  - Phenotype
MH  - Selection, Genetic/*genetics
MH  - Triticum/*genetics/growth & development
PMC - PMC7423122
COIS- The authors have declared that no competing interests exist.
EDAT- 2020/08/14 06:00
MHDA- 2020/10/03 06:00
PMCR- 2020/08/12
CRDT- 2020/08/14 06:00
PHST- 2020/03/29 00:00 [received]
PHST- 2020/07/04 00:00 [accepted]
PHST- 2020/08/14 06:00 [entrez]
PHST- 2020/08/14 06:00 [pubmed]
PHST- 2020/10/03 06:00 [medline]
PHST- 2020/08/12 00:00 [pmc-release]
AID - PONE-D-20-08959 [pii]
AID - 10.1371/journal.pone.0236351 [doi]
PST - epublish
SO  - PLoS One. 2020 Aug 12;15(8):e0236351. doi: 10.1371/journal.pone.0236351. 
      eCollection 2020.