Notice bibliographique
Résumé
With the 70 F1 reciprocal crossing combinations made from widely applied dual-purpose sterile lines such as Zhu 1 S,ZhunS,Peiai 64 S,7001 S and 10 ordianary rice varieties like R 1,R 11,R 16,R 32,Chenghui 210,Xianhui 207,Yan 111 R,R 968,Shuhui 527 as experimental materials,comparing the different agronomic traits of the reciprocal crossing combinations cultivated under the same conditions,this experiment attempts to study the regulations of cytoplasm effects on heterosis so as to provide a more comprehensive oretical understanding on taking full advantage of two-line hybrid rice and cultivating combinations with high yield and fine quality.(1) With the reciprocal crossing combinations made from Zhu 1 S,Lu 18 S which have the same cytoplasm×R 16,Yan 111 R,R 968,9311 and Guangluai-4.as experimental material,the experiment conducts a significant analysis on the their agronomic traits and the production advantage and the result shows that there are significant differences in tiller number,effective panicle,spike length,shoot dry weight,effective grain number,and total grain weight per plant between the reciprocal crossing combinations made by Zhu 1 S and Lu 18 S.This indicates that the significantly different traits between reciprocal crossing combinations are the results of cytoplasm effects.There are also significant differences existing in plant height,grain number,1 000-grain weight and tiller number.But the regulations are different between the combinations made by Zhu 1 S and Lu 18 S,which means that these four traits may have relationship with nucleo-cytoplasmic interaction.(2) The seed setting rates of inter subspecific hybrid combinations under different cytoplasm background are not high,and the seed setting rates are also low,which means that the incompatibility of inter subspecific hybrid are not changed in these combinations.This suggests that the incompatibility of inter subspecific hybrid are controlled not by cytoplasm,but nuclear gene.(3) A comparison of the biological yield of the reciprocal crossing combinations made from sterile lines of Zhu 1 S、Peiai 64 S、7001 S and ZhunS illustrates that the quantity of positive cross combinations made by Zhu 1 S is the highest with the rate reaching as high as 64.3%.This indicates that the cytoplasm of Zhu 1 S has wide combination ability.The combination numbers of the other positive cross combinations are lower than 50% and are respectively 37.5% and 36.4% in that of 7001 S and ZhunS.So we can infer that the cytoplasm of 7001 S and ZhunS may have the character of specific combining ability.(4)The plant height,shoot dry weight and total grain weight per plant of combinations which take R 16 as female parent are significantly lower,which indicates that the cytoplasm of R 16 blocks the function of heterotic advantage and has negative cytoplasm effect.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».